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-rw-r--r--security/tomoyo/Kconfig11
-rw-r--r--security/tomoyo/Makefile1
-rw-r--r--security/tomoyo/common.c2206
-rw-r--r--security/tomoyo/common.h359
-rw-r--r--security/tomoyo/domain.c878
-rw-r--r--security/tomoyo/file.c1241
-rw-r--r--security/tomoyo/realpath.c482
-rw-r--r--security/tomoyo/realpath.h66
-rw-r--r--security/tomoyo/tomoyo.c294
-rw-r--r--security/tomoyo/tomoyo.h106
10 files changed, 5644 insertions, 0 deletions
diff --git a/security/tomoyo/Kconfig b/security/tomoyo/Kconfig
new file mode 100644
index 000000000000..c8f385793235
--- /dev/null
+++ b/security/tomoyo/Kconfig
@@ -0,0 +1,11 @@
+config SECURITY_TOMOYO
+ bool "TOMOYO Linux Support"
+ depends on SECURITY
+ select SECURITYFS
+ select SECURITY_PATH
+ default n
+ help
+ This selects TOMOYO Linux, pathname-based access control.
+ Required userspace tools and further information may be
+ found at <http://tomoyo.sourceforge.jp/>.
+ If you are unsure how to answer this question, answer N.
diff --git a/security/tomoyo/Makefile b/security/tomoyo/Makefile
new file mode 100644
index 000000000000..10ccd686b290
--- /dev/null
+++ b/security/tomoyo/Makefile
@@ -0,0 +1 @@
+obj-y = common.o realpath.o tomoyo.o domain.o file.o
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
new file mode 100644
index 000000000000..92cea656ad21
--- /dev/null
+++ b/security/tomoyo/common.c
@@ -0,0 +1,2206 @@
+/*
+ * security/tomoyo/common.c
+ *
+ * Common functions for TOMOYO.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#include <linux/uaccess.h>
+#include <linux/security.h>
+#include <linux/hardirq.h>
+#include "realpath.h"
+#include "common.h"
+#include "tomoyo.h"
+
+/* Has loading policy done? */
+bool tomoyo_policy_loaded;
+
+/* String table for functionality that takes 4 modes. */
+static const char *tomoyo_mode_4[4] = {
+ "disabled", "learning", "permissive", "enforcing"
+};
+/* String table for functionality that takes 2 modes. */
+static const char *tomoyo_mode_2[4] = {
+ "disabled", "enabled", "enabled", "enabled"
+};
+
+/* Table for profile. */
+static struct {
+ const char *keyword;
+ unsigned int current_value;
+ const unsigned int max_value;
+} tomoyo_control_array[TOMOYO_MAX_CONTROL_INDEX] = {
+ [TOMOYO_MAC_FOR_FILE] = { "MAC_FOR_FILE", 0, 3 },
+ [TOMOYO_MAX_ACCEPT_ENTRY] = { "MAX_ACCEPT_ENTRY", 2048, INT_MAX },
+ [TOMOYO_VERBOSE] = { "TOMOYO_VERBOSE", 1, 1 },
+};
+
+/* Profile table. Memory is allocated as needed. */
+static struct tomoyo_profile {
+ unsigned int value[TOMOYO_MAX_CONTROL_INDEX];
+ const struct tomoyo_path_info *comment;
+} *tomoyo_profile_ptr[TOMOYO_MAX_PROFILES];
+
+/* Permit policy management by non-root user? */
+static bool tomoyo_manage_by_non_root;
+
+/* Utility functions. */
+
+/* Open operation for /sys/kernel/security/tomoyo/ interface. */
+static int tomoyo_open_control(const u8 type, struct file *file);
+/* Close /sys/kernel/security/tomoyo/ interface. */
+static int tomoyo_close_control(struct file *file);
+/* Read operation for /sys/kernel/security/tomoyo/ interface. */
+static int tomoyo_read_control(struct file *file, char __user *buffer,
+ const int buffer_len);
+/* Write operation for /sys/kernel/security/tomoyo/ interface. */
+static int tomoyo_write_control(struct file *file, const char __user *buffer,
+ const int buffer_len);
+
+/**
+ * tomoyo_is_byte_range - Check whether the string isa \ooo style octal value.
+ *
+ * @str: Pointer to the string.
+ *
+ * Returns true if @str is a \ooo style octal value, false otherwise.
+ *
+ * TOMOYO uses \ooo style representation for 0x01 - 0x20 and 0x7F - 0xFF.
+ * This function verifies that \ooo is in valid range.
+ */
+static inline bool tomoyo_is_byte_range(const char *str)
+{
+ return *str >= '0' && *str++ <= '3' &&
+ *str >= '0' && *str++ <= '7' &&
+ *str >= '0' && *str <= '7';
+}
+
+/**
+ * tomoyo_is_alphabet_char - Check whether the character is an alphabet.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is an alphabet character, false otherwise.
+ */
+static inline bool tomoyo_is_alphabet_char(const char c)
+{
+ return (c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z');
+}
+
+/**
+ * tomoyo_make_byte - Make byte value from three octal characters.
+ *
+ * @c1: The first character.
+ * @c2: The second character.
+ * @c3: The third character.
+ *
+ * Returns byte value.
+ */
+static inline u8 tomoyo_make_byte(const u8 c1, const u8 c2, const u8 c3)
+{
+ return ((c1 - '0') << 6) + ((c2 - '0') << 3) + (c3 - '0');
+}
+
+/**
+ * tomoyo_str_starts - Check whether the given string starts with the given keyword.
+ *
+ * @src: Pointer to pointer to the string.
+ * @find: Pointer to the keyword.
+ *
+ * Returns true if @src starts with @find, false otherwise.
+ *
+ * The @src is updated to point the first character after the @find
+ * if @src starts with @find.
+ */
+static bool tomoyo_str_starts(char **src, const char *find)
+{
+ const int len = strlen(find);
+ char *tmp = *src;
+
+ if (strncmp(tmp, find, len))
+ return false;
+ tmp += len;
+ *src = tmp;
+ return true;
+}
+
+/**
+ * tomoyo_normalize_line - Format string.
+ *
+ * @buffer: The line to normalize.
+ *
+ * Leading and trailing whitespaces are removed.
+ * Multiple whitespaces are packed into single space.
+ *
+ * Returns nothing.
+ */
+static void tomoyo_normalize_line(unsigned char *buffer)
+{
+ unsigned char *sp = buffer;
+ unsigned char *dp = buffer;
+ bool first = true;
+
+ while (tomoyo_is_invalid(*sp))
+ sp++;
+ while (*sp) {
+ if (!first)
+ *dp++ = ' ';
+ first = false;
+ while (tomoyo_is_valid(*sp))
+ *dp++ = *sp++;
+ while (tomoyo_is_invalid(*sp))
+ sp++;
+ }
+ *dp = '\0';
+}
+
+/**
+ * tomoyo_is_correct_path - Validate a pathname.
+ * @filename: The pathname to check.
+ * @start_type: Should the pathname start with '/'?
+ * 1 = must / -1 = must not / 0 = don't care
+ * @pattern_type: Can the pathname contain a wildcard?
+ * 1 = must / -1 = must not / 0 = don't care
+ * @end_type: Should the pathname end with '/'?
+ * 1 = must / -1 = must not / 0 = don't care
+ * @function: The name of function calling me.
+ *
+ * Check whether the given filename follows the naming rules.
+ * Returns true if @filename follows the naming rules, false otherwise.
+ */
+bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
+ const s8 pattern_type, const s8 end_type,
+ const char *function)
+{
+ bool contains_pattern = false;
+ unsigned char c;
+ unsigned char d;
+ unsigned char e;
+ const char *original_filename = filename;
+
+ if (!filename)
+ goto out;
+ c = *filename;
+ if (start_type == 1) { /* Must start with '/' */
+ if (c != '/')
+ goto out;
+ } else if (start_type == -1) { /* Must not start with '/' */
+ if (c == '/')
+ goto out;
+ }
+ if (c)
+ c = *(filename + strlen(filename) - 1);
+ if (end_type == 1) { /* Must end with '/' */
+ if (c != '/')
+ goto out;
+ } else if (end_type == -1) { /* Must not end with '/' */
+ if (c == '/')
+ goto out;
+ }
+ while ((c = *filename++) != '\0') {
+ if (c == '\\') {
+ switch ((c = *filename++)) {
+ case '\\': /* "\\" */
+ continue;
+ case '$': /* "\$" */
+ case '+': /* "\+" */
+ case '?': /* "\?" */
+ case '*': /* "\*" */
+ case '@': /* "\@" */
+ case 'x': /* "\x" */
+ case 'X': /* "\X" */
+ case 'a': /* "\a" */
+ case 'A': /* "\A" */
+ case '-': /* "\-" */
+ if (pattern_type == -1)
+ break; /* Must not contain pattern */
+ contains_pattern = true;
+ continue;
+ case '0': /* "\ooo" */
+ case '1':
+ case '2':
+ case '3':
+ d = *filename++;
+ if (d < '0' || d > '7')
+ break;
+ e = *filename++;
+ if (e < '0' || e > '7')
+ break;
+ c = tomoyo_make_byte(c, d, e);
+ if (tomoyo_is_invalid(c))
+ continue; /* pattern is not \000 */
+ }
+ goto out;
+ } else if (tomoyo_is_invalid(c)) {
+ goto out;
+ }
+ }
+ if (pattern_type == 1) { /* Must contain pattern */
+ if (!contains_pattern)
+ goto out;
+ }
+ return true;
+ out:
+ printk(KERN_DEBUG "%s: Invalid pathname '%s'\n", function,
+ original_filename);
+ return false;
+}
+
+/**
+ * tomoyo_is_correct_domain - Check whether the given domainname follows the naming rules.
+ * @domainname: The domainname to check.
+ * @function: The name of function calling me.
+ *
+ * Returns true if @domainname follows the naming rules, false otherwise.
+ */
+bool tomoyo_is_correct_domain(const unsigned char *domainname,
+ const char *function)
+{
+ unsigned char c;
+ unsigned char d;
+ unsigned char e;
+ const char *org_domainname = domainname;
+
+ if (!domainname || strncmp(domainname, TOMOYO_ROOT_NAME,
+ TOMOYO_ROOT_NAME_LEN))
+ goto out;
+ domainname += TOMOYO_ROOT_NAME_LEN;
+ if (!*domainname)
+ return true;
+ do {
+ if (*domainname++ != ' ')
+ goto out;
+ if (*domainname++ != '/')
+ goto out;
+ while ((c = *domainname) != '\0' && c != ' ') {
+ domainname++;
+ if (c == '\\') {
+ c = *domainname++;
+ switch ((c)) {
+ case '\\': /* "\\" */
+ continue;
+ case '0': /* "\ooo" */
+ case '1':
+ case '2':
+ case '3':
+ d = *domainname++;
+ if (d < '0' || d > '7')
+ break;
+ e = *domainname++;
+ if (e < '0' || e > '7')
+ break;
+ c = tomoyo_make_byte(c, d, e);
+ if (tomoyo_is_invalid(c))
+ /* pattern is not \000 */
+ continue;
+ }
+ goto out;
+ } else if (tomoyo_is_invalid(c)) {
+ goto out;
+ }
+ }
+ } while (*domainname);
+ return true;
+ out:
+ printk(KERN_DEBUG "%s: Invalid domainname '%s'\n", function,
+ org_domainname);
+ return false;
+}
+
+/**
+ * tomoyo_is_domain_def - Check whether the given token can be a domainname.
+ *
+ * @buffer: The token to check.
+ *
+ * Returns true if @buffer possibly be a domainname, false otherwise.
+ */
+bool tomoyo_is_domain_def(const unsigned char *buffer)
+{
+ return !strncmp(buffer, TOMOYO_ROOT_NAME, TOMOYO_ROOT_NAME_LEN);
+}
+
+/**
+ * tomoyo_find_domain - Find a domain by the given name.
+ *
+ * @domainname: The domainname to find.
+ *
+ * Caller must call down_read(&tomoyo_domain_list_lock); or
+ * down_write(&tomoyo_domain_list_lock); .
+ *
+ * Returns pointer to "struct tomoyo_domain_info" if found, NULL otherwise.
+ */
+struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname)
+{
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_path_info name;
+
+ name.name = domainname;
+ tomoyo_fill_path_info(&name);
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ if (!domain->is_deleted &&
+ !tomoyo_pathcmp(&name, domain->domainname))
+ return domain;
+ }
+ return NULL;
+}
+
+/**
+ * tomoyo_path_depth - Evaluate the number of '/' in a string.
+ *
+ * @pathname: The string to evaluate.
+ *
+ * Returns path depth of the string.
+ *
+ * I score 2 for each of the '/' in the @pathname
+ * and score 1 if the @pathname ends with '/'.
+ */
+static int tomoyo_path_depth(const char *pathname)
+{
+ int i = 0;
+
+ if (pathname) {
+ const char *ep = pathname + strlen(pathname);
+ if (pathname < ep--) {
+ if (*ep != '/')
+ i++;
+ while (pathname <= ep)
+ if (*ep-- == '/')
+ i += 2;
+ }
+ }
+ return i;
+}
+
+/**
+ * tomoyo_const_part_length - Evaluate the initial length without a pattern in a token.
+ *
+ * @filename: The string to evaluate.
+ *
+ * Returns the initial length without a pattern in @filename.
+ */
+static int tomoyo_const_part_length(const char *filename)
+{
+ char c;
+ int len = 0;
+
+ if (!filename)
+ return 0;
+ while ((c = *filename++) != '\0') {
+ if (c != '\\') {
+ len++;
+ continue;
+ }
+ c = *filename++;
+ switch (c) {
+ case '\\': /* "\\" */
+ len += 2;
+ continue;
+ case '0': /* "\ooo" */
+ case '1':
+ case '2':
+ case '3':
+ c = *filename++;
+ if (c < '0' || c > '7')
+ break;
+ c = *filename++;
+ if (c < '0' || c > '7')
+ break;
+ len += 4;
+ continue;
+ }
+ break;
+ }
+ return len;
+}
+
+/**
+ * tomoyo_fill_path_info - Fill in "struct tomoyo_path_info" members.
+ *
+ * @ptr: Pointer to "struct tomoyo_path_info" to fill in.
+ *
+ * The caller sets "struct tomoyo_path_info"->name.
+ */
+void tomoyo_fill_path_info(struct tomoyo_path_info *ptr)
+{
+ const char *name = ptr->name;
+ const int len = strlen(name);
+
+ ptr->total_len = len;
+ ptr->const_len = tomoyo_const_part_length(name);
+ ptr->is_dir = len && (name[len - 1] == '/');
+ ptr->is_patterned = (ptr->const_len < len);
+ ptr->hash = full_name_hash(name, len);
+ ptr->depth = tomoyo_path_depth(name);
+}
+
+/**
+ * tomoyo_file_matches_to_pattern2 - Pattern matching without '/' character
+ * and "\-" pattern.
+ *
+ * @filename: The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern: The start of pattern to compare.
+ * @pattern_end: The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool tomoyo_file_matches_to_pattern2(const char *filename,
+ const char *filename_end,
+ const char *pattern,
+ const char *pattern_end)
+{
+ while (filename < filename_end && pattern < pattern_end) {
+ char c;
+ if (*pattern != '\\') {
+ if (*filename++ != *pattern++)
+ return false;
+ continue;
+ }
+ c = *filename;
+ pattern++;
+ switch (*pattern) {
+ int i;
+ int j;
+ case '?':
+ if (c == '/') {
+ return false;
+ } else if (c == '\\') {
+ if (filename[1] == '\\')
+ filename++;
+ else if (tomoyo_is_byte_range(filename + 1))
+ filename += 3;
+ else
+ return false;
+ }
+ break;
+ case '\\':
+ if (c != '\\')
+ return false;
+ if (*++filename != '\\')
+ return false;
+ break;
+ case '+':
+ if (!isdigit(c))
+ return false;
+ break;
+ case 'x':
+ if (!isxdigit(c))
+ return false;
+ break;
+ case 'a':
+ if (!tomoyo_is_alphabet_char(c))
+ return false;
+ break;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ if (c == '\\' && tomoyo_is_byte_range(filename + 1)
+ && strncmp(filename + 1, pattern, 3) == 0) {
+ filename += 3;
+ pattern += 2;
+ break;
+ }
+ return false; /* Not matched. */
+ case '*':
+ case '@':
+ for (i = 0; i <= filename_end - filename; i++) {
+ if (tomoyo_file_matches_to_pattern2(
+ filename + i, filename_end,
+ pattern + 1, pattern_end))
+ return true;
+ c = filename[i];
+ if (c == '.' && *pattern == '@')
+ break;
+ if (c != '\\')
+ continue;
+ if (filename[i + 1] == '\\')
+ i++;
+ else if (tomoyo_is_byte_range(filename + i + 1))
+ i += 3;
+ else
+ break; /* Bad pattern. */
+ }
+ return false; /* Not matched. */
+ default:
+ j = 0;
+ c = *pattern;
+ if (c == '$') {
+ while (isdigit(filename[j]))
+ j++;
+ } else if (c == 'X') {
+ while (isxdigit(filename[j]))
+ j++;
+ } else if (c == 'A') {
+ while (tomoyo_is_alphabet_char(filename[j]))
+ j++;
+ }
+ for (i = 1; i <= j; i++) {
+ if (tomoyo_file_matches_to_pattern2(
+ filename + i, filename_end,
+ pattern + 1, pattern_end))
+ return true;
+ }
+ return false; /* Not matched or bad pattern. */
+ }
+ filename++;
+ pattern++;
+ }
+ while (*pattern == '\\' &&
+ (*(pattern + 1) == '*' || *(pattern + 1) == '@'))
+ pattern += 2;
+ return filename == filename_end && pattern == pattern_end;
+}
+
+/**
+ * tomoyo_file_matches_to_pattern - Pattern matching without without '/' character.
+ *
+ * @filename: The start of string to check.
+ * @filename_end: The end of string to check.
+ * @pattern: The start of pattern to compare.
+ * @pattern_end: The end of pattern to compare.
+ *
+ * Returns true if @filename matches @pattern, false otherwise.
+ */
+static bool tomoyo_file_matches_to_pattern(const char *filename,
+ const char *filename_end,
+ const char *pattern,
+ const char *pattern_end)
+{
+ const char *pattern_start = pattern;
+ bool first = true;
+ bool result;
+
+ while (pattern < pattern_end - 1) {
+ /* Split at "\-" pattern. */
+ if (*pattern++ != '\\' || *pattern++ != '-')
+ continue;
+ result = tomoyo_file_matches_to_pattern2(filename,
+ filename_end,
+ pattern_start,
+ pattern - 2);
+ if (first)
+ result = !result;
+ if (result)
+ return false;
+ first = false;
+ pattern_start = pattern;
+ }
+ result = tomoyo_file_matches_to_pattern2(filename, filename_end,
+ pattern_start, pattern_end);
+ return first ? result : !result;
+}
+
+/**
+ * tomoyo_path_matches_pattern - Check whether the given filename matches the given pattern.
+ * @filename: The filename to check.
+ * @pattern: The pattern to compare.
+ *
+ * Returns true if matches, false otherwise.
+ *
+ * The following patterns are available.
+ * \\ \ itself.
+ * \ooo Octal representation of a byte.
+ * \* More than or equals to 0 character other than '/'.
+ * \@ More than or equals to 0 character other than '/' or '.'.
+ * \? 1 byte character other than '/'.
+ * \$ More than or equals to 1 decimal digit.
+ * \+ 1 decimal digit.
+ * \X More than or equals to 1 hexadecimal digit.
+ * \x 1 hexadecimal digit.
+ * \A More than or equals to 1 alphabet character.
+ * \a 1 alphabet character.
+ * \- Subtraction operator.
+ */
+bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
+ const struct tomoyo_path_info *pattern)
+{
+ /*
+ if (!filename || !pattern)
+ return false;
+ */
+ const char *f = filename->name;
+ const char *p = pattern->name;
+ const int len = pattern->const_len;
+
+ /* If @pattern doesn't contain pattern, I can use strcmp(). */
+ if (!pattern->is_patterned)
+ return !tomoyo_pathcmp(filename, pattern);
+ /* Dont compare if the number of '/' differs. */
+ if (filename->depth != pattern->depth)
+ return false;
+ /* Compare the initial length without patterns. */
+ if (strncmp(f, p, len))
+ return false;
+ f += len;
+ p += len;
+ /* Main loop. Compare each directory component. */
+ while (*f && *p) {
+ const char *f_delimiter = strchr(f, '/');
+ const char *p_delimiter = strchr(p, '/');
+ if (!f_delimiter)
+ f_delimiter = f + strlen(f);
+ if (!p_delimiter)
+ p_delimiter = p + strlen(p);
+ if (!tomoyo_file_matches_to_pattern(f, f_delimiter,
+ p, p_delimiter))
+ return false;
+ f = f_delimiter;
+ if (*f)
+ f++;
+ p = p_delimiter;
+ if (*p)
+ p++;
+ }
+ /* Ignore trailing "\*" and "\@" in @pattern. */
+ while (*p == '\\' &&
+ (*(p + 1) == '*' || *(p + 1) == '@'))
+ p += 2;
+ return !*f && !*p;
+}
+
+/**
+ * tomoyo_io_printf - Transactional printf() to "struct tomoyo_io_buffer" structure.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @fmt: The printf()'s format string, followed by parameters.
+ *
+ * Returns true if output was written, false otherwise.
+ *
+ * The snprintf() will truncate, but tomoyo_io_printf() won't.
+ */
+bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
+{
+ va_list args;
+ int len;
+ int pos = head->read_avail;
+ int size = head->readbuf_size - pos;
+
+ if (size <= 0)
+ return false;
+ va_start(args, fmt);
+ len = vsnprintf(head->read_buf + pos, size, fmt, args);
+ va_end(args);
+ if (pos + len >= head->readbuf_size)
+ return false;
+ head->read_avail += len;
+ return true;
+}
+
+/**
+ * tomoyo_get_exe - Get tomoyo_realpath() of current process.
+ *
+ * Returns the tomoyo_realpath() of current process on success, NULL otherwise.
+ *
+ * This function uses tomoyo_alloc(), so the caller must call tomoyo_free()
+ * if this function didn't return NULL.
+ */
+static const char *tomoyo_get_exe(void)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma;
+ const char *cp = NULL;
+
+ if (!mm)
+ return NULL;
+ down_read(&mm->mmap_sem);
+ for (vma = mm->mmap; vma; vma = vma->vm_next) {
+ if ((vma->vm_flags & VM_EXECUTABLE) && vma->vm_file) {
+ cp = tomoyo_realpath_from_path(&vma->vm_file->f_path);
+ break;
+ }
+ }
+ up_read(&mm->mmap_sem);
+ return cp;
+}
+
+/**
+ * tomoyo_get_msg - Get warning message.
+ *
+ * @is_enforce: Is it enforcing mode?
+ *
+ * Returns "ERROR" or "WARNING".
+ */
+const char *tomoyo_get_msg(const bool is_enforce)
+{
+ if (is_enforce)
+ return "ERROR";
+ else
+ return "WARNING";
+}
+
+/**
+ * tomoyo_check_flags - Check mode for specified functionality.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @index: The functionality to check mode.
+ *
+ * TOMOYO checks only process context.
+ * This code disables TOMOYO's enforcement in case the function is called from
+ * interrupt context.
+ */
+unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
+ const u8 index)
+{
+ const u8 profile = domain->profile;
+
+ if (WARN_ON(in_interrupt()))
+ return 0;
+ return tomoyo_policy_loaded && index < TOMOYO_MAX_CONTROL_INDEX
+#if TOMOYO_MAX_PROFILES != 256
+ && profile < TOMOYO_MAX_PROFILES
+#endif
+ && tomoyo_profile_ptr[profile] ?
+ tomoyo_profile_ptr[profile]->value[index] : 0;
+}
+
+/**
+ * tomoyo_verbose_mode - Check whether TOMOYO is verbose mode.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ *
+ * Returns true if domain policy violation warning should be printed to
+ * console.
+ */
+bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain)
+{
+ return tomoyo_check_flags(domain, TOMOYO_VERBOSE) != 0;
+}
+
+/**
+ * tomoyo_domain_quota_is_ok - Check for domain's quota.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ *
+ * Returns true if the domain is not exceeded quota, false otherwise.
+ */
+bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain)
+{
+ unsigned int count = 0;
+ struct tomoyo_acl_info *ptr;
+
+ if (!domain)
+ return true;
+ down_read(&tomoyo_domain_acl_info_list_lock);
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ if (ptr->type & TOMOYO_ACL_DELETED)
+ continue;
+ switch (tomoyo_acl_type2(ptr)) {
+ struct tomoyo_single_path_acl_record *acl1;
+ struct tomoyo_double_path_acl_record *acl2;
+ u16 perm;
+ case TOMOYO_TYPE_SINGLE_PATH_ACL:
+ acl1 = container_of(ptr,
+ struct tomoyo_single_path_acl_record,
+ head);
+ perm = acl1->perm;
+ if (perm & (1 << TOMOYO_TYPE_EXECUTE_ACL))
+ count++;
+ if (perm &
+ ((1 << TOMOYO_TYPE_READ_ACL) |
+ (1 << TOMOYO_TYPE_WRITE_ACL)))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_CREATE_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_UNLINK_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_MKDIR_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_RMDIR_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_MKFIFO_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_MKSOCK_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_MKBLOCK_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_MKCHAR_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_TRUNCATE_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_SYMLINK_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_REWRITE_ACL))
+ count++;
+ break;
+ case TOMOYO_TYPE_DOUBLE_PATH_ACL:
+ acl2 = container_of(ptr,
+ struct tomoyo_double_path_acl_record,
+ head);
+ perm = acl2->perm;
+ if (perm & (1 << TOMOYO_TYPE_LINK_ACL))
+ count++;
+ if (perm & (1 << TOMOYO_TYPE_RENAME_ACL))
+ count++;
+ break;
+ }
+ }
+ up_read(&tomoyo_domain_acl_info_list_lock);
+ if (count < tomoyo_check_flags(domain, TOMOYO_MAX_ACCEPT_ENTRY))
+ return true;
+ if (!domain->quota_warned) {
+ domain->quota_warned = true;
+ printk(KERN_WARNING "TOMOYO-WARNING: "
+ "Domain '%s' has so many ACLs to hold. "
+ "Stopped learning mode.\n", domain->domainname->name);
+ }
+ return false;
+}
+
+/**
+ * tomoyo_find_or_assign_new_profile - Create a new profile.
+ *
+ * @profile: Profile number to create.
+ *
+ * Returns pointer to "struct tomoyo_profile" on success, NULL otherwise.
+ */
+static struct tomoyo_profile *tomoyo_find_or_assign_new_profile(const unsigned
+ int profile)
+{
+ static DEFINE_MUTEX(lock);
+ struct tomoyo_profile *ptr = NULL;
+ int i;
+
+ if (profile >= TOMOYO_MAX_PROFILES)
+ return NULL;
+ /***** EXCLUSIVE SECTION START *****/
+ mutex_lock(&lock);
+ ptr = tomoyo_profile_ptr[profile];
+ if (ptr)
+ goto ok;
+ ptr = tomoyo_alloc_element(sizeof(*ptr));
+ if (!ptr)
+ goto ok;
+ for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++)
+ ptr->value[i] = tomoyo_control_array[i].current_value;
+ mb(); /* Avoid out-of-order execution. */
+ tomoyo_profile_ptr[profile] = ptr;
+ ok:
+ mutex_unlock(&lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return ptr;
+}
+
+/**
+ * tomoyo_write_profile - Write to profile table.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_write_profile(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ unsigned int i;
+ unsigned int value;
+ char *cp;
+ struct tomoyo_profile *profile;
+ unsigned long num;
+
+ cp = strchr(data, '-');
+ if (cp)
+ *cp = '\0';
+ if (strict_strtoul(data, 10, &num))
+ return -EINVAL;
+ if (cp)
+ data = cp + 1;
+ profile = tomoyo_find_or_assign_new_profile(num);
+ if (!profile)
+ return -EINVAL;
+ cp = strchr(data, '=');
+ if (!cp)
+ return -EINVAL;
+ *cp = '\0';
+ if (!strcmp(data, "COMMENT")) {
+ profile->comment = tomoyo_save_name(cp + 1);
+ return 0;
+ }
+ for (i = 0; i < TOMOYO_MAX_CONTROL_INDEX; i++) {
+ if (strcmp(data, tomoyo_control_array[i].keyword))
+ continue;
+ if (sscanf(cp + 1, "%u", &value) != 1) {
+ int j;
+ const char **modes;
+ switch (i) {
+ case TOMOYO_VERBOSE:
+ modes = tomoyo_mode_2;
+ break;
+ default:
+ modes = tomoyo_mode_4;
+ break;
+ }
+ for (j = 0; j < 4; j++) {
+ if (strcmp(cp + 1, modes[j]))
+ continue;
+ value = j;
+ break;
+ }
+ if (j == 4)
+ return -EINVAL;
+ } else if (value > tomoyo_control_array[i].max_value) {
+ value = tomoyo_control_array[i].max_value;
+ }
+ profile->value[i] = value;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+/**
+ * tomoyo_read_profile - Read from profile table.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_read_profile(struct tomoyo_io_buffer *head)
+{
+ static const int total = TOMOYO_MAX_CONTROL_INDEX + 1;
+ int step;
+
+ if (head->read_eof)
+ return 0;
+ for (step = head->read_step; step < TOMOYO_MAX_PROFILES * total;
+ step++) {
+ const u8 index = step / total;
+ u8 type = step % total;
+ const struct tomoyo_profile *profile
+ = tomoyo_profile_ptr[index];
+ head->read_step = step;
+ if (!profile)
+ continue;
+ if (!type) { /* Print profile' comment tag. */
+ if (!tomoyo_io_printf(head, "%u-COMMENT=%s\n",
+ index, profile->comment ?
+ profile->comment->name : ""))
+ break;
+ continue;
+ }
+ type--;
+ if (type < TOMOYO_MAX_CONTROL_INDEX) {
+ const unsigned int value = profile->value[type];
+ const char **modes = NULL;
+ const char *keyword
+ = tomoyo_control_array[type].keyword;
+ switch (tomoyo_control_array[type].max_value) {
+ case 3:
+ modes = tomoyo_mode_4;
+ break;
+ case 1:
+ modes = tomoyo_mode_2;
+ break;
+ }
+ if (modes) {
+ if (!tomoyo_io_printf(head, "%u-%s=%s\n", index,
+ keyword, modes[value]))
+ break;
+ } else {
+ if (!tomoyo_io_printf(head, "%u-%s=%u\n", index,
+ keyword, value))
+ break;
+ }
+ }
+ }
+ if (step == TOMOYO_MAX_PROFILES * total)
+ head->read_eof = true;
+ return 0;
+}
+
+/* Structure for policy manager. */
+struct tomoyo_policy_manager_entry {
+ struct list_head list;
+ /* A path to program or a domainname. */
+ const struct tomoyo_path_info *manager;
+ bool is_domain; /* True if manager is a domainname. */
+ bool is_deleted; /* True if this entry is deleted. */
+};
+
+/* The list for "struct tomoyo_policy_manager_entry". */
+static LIST_HEAD(tomoyo_policy_manager_list);
+static DECLARE_RWSEM(tomoyo_policy_manager_list_lock);
+
+/**
+ * tomoyo_update_manager_entry - Add a manager entry.
+ *
+ * @manager: The path to manager or the domainnamme.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_manager_entry(const char *manager,
+ const bool is_delete)
+{
+ struct tomoyo_policy_manager_entry *new_entry;
+ struct tomoyo_policy_manager_entry *ptr;
+ const struct tomoyo_path_info *saved_manager;
+ int error = -ENOMEM;
+ bool is_domain = false;
+
+ if (tomoyo_is_domain_def(manager)) {
+ if (!tomoyo_is_correct_domain(manager, __func__))
+ return -EINVAL;
+ is_domain = true;
+ } else {
+ if (!tomoyo_is_correct_path(manager, 1, -1, -1, __func__))
+ return -EINVAL;
+ }
+ saved_manager = tomoyo_save_name(manager);
+ if (!saved_manager)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_policy_manager_list_lock);
+ list_for_each_entry(ptr, &tomoyo_policy_manager_list, list) {
+ if (ptr->manager != saved_manager)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->manager = saved_manager;
+ new_entry->is_domain = is_domain;
+ list_add_tail(&new_entry->list, &tomoyo_policy_manager_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_policy_manager_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_write_manager_policy - Write manager policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_write_manager_policy(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE);
+
+ if (!strcmp(data, "manage_by_non_root")) {
+ tomoyo_manage_by_non_root = !is_delete;
+ return 0;
+ }
+ return tomoyo_update_manager_entry(data, is_delete);
+}
+
+/**
+ * tomoyo_read_manager_policy - Read manager policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_read_manager_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ if (head->read_eof)
+ return 0;
+ down_read(&tomoyo_policy_manager_list_lock);
+ list_for_each_cookie(pos, head->read_var2,
+ &tomoyo_policy_manager_list) {
+ struct tomoyo_policy_manager_entry *ptr;
+ ptr = list_entry(pos, struct tomoyo_policy_manager_entry,
+ list);
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_io_printf(head, "%s\n", ptr->manager->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_policy_manager_list_lock);
+ head->read_eof = done;
+ return 0;
+}
+
+/**
+ * tomoyo_is_policy_manager - Check whether the current process is a policy manager.
+ *
+ * Returns true if the current process is permitted to modify policy
+ * via /sys/kernel/security/tomoyo/ interface.
+ */
+static bool tomoyo_is_policy_manager(void)
+{
+ struct tomoyo_policy_manager_entry *ptr;
+ const char *exe;
+ const struct task_struct *task = current;
+ const struct tomoyo_path_info *domainname = tomoyo_domain()->domainname;
+ bool found = false;
+
+ if (!tomoyo_policy_loaded)
+ return true;
+ if (!tomoyo_manage_by_non_root && (task->cred->uid || task->cred->euid))
+ return false;
+ down_read(&tomoyo_policy_manager_list_lock);
+ list_for_each_entry(ptr, &tomoyo_policy_manager_list, list) {
+ if (!ptr->is_deleted && ptr->is_domain
+ && !tomoyo_pathcmp(domainname, ptr->manager)) {
+ found = true;
+ break;
+ }
+ }
+ up_read(&tomoyo_policy_manager_list_lock);
+ if (found)
+ return true;
+ exe = tomoyo_get_exe();
+ if (!exe)
+ return false;
+ down_read(&tomoyo_policy_manager_list_lock);
+ list_for_each_entry(ptr, &tomoyo_policy_manager_list, list) {
+ if (!ptr->is_deleted && !ptr->is_domain
+ && !strcmp(exe, ptr->manager->name)) {
+ found = true;
+ break;
+ }
+ }
+ up_read(&tomoyo_policy_manager_list_lock);
+ if (!found) { /* Reduce error messages. */
+ static pid_t last_pid;
+ const pid_t pid = current->pid;
+ if (last_pid != pid) {
+ printk(KERN_WARNING "%s ( %s ) is not permitted to "
+ "update policies.\n", domainname->name, exe);
+ last_pid = pid;
+ }
+ }
+ tomoyo_free(exe);
+ return found;
+}
+
+/**
+ * tomoyo_is_select_one - Parse select command.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @data: String to parse.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_is_select_one(struct tomoyo_io_buffer *head,
+ const char *data)
+{
+ unsigned int pid;
+ struct tomoyo_domain_info *domain = NULL;
+
+ if (sscanf(data, "pid=%u", &pid) == 1) {
+ struct task_struct *p;
+ /***** CRITICAL SECTION START *****/
+ read_lock(&tasklist_lock);
+ p = find_task_by_vpid(pid);
+ if (p)
+ domain = tomoyo_real_domain(p);
+ read_unlock(&tasklist_lock);
+ /***** CRITICAL SECTION END *****/
+ } else if (!strncmp(data, "domain=", 7)) {
+ if (tomoyo_is_domain_def(data + 7)) {
+ down_read(&tomoyo_domain_list_lock);
+ domain = tomoyo_find_domain(data + 7);
+ up_read(&tomoyo_domain_list_lock);
+ }
+ } else
+ return false;
+ head->write_var1 = domain;
+ /* Accessing read_buf is safe because head->io_sem is held. */
+ if (!head->read_buf)
+ return true; /* Do nothing if open(O_WRONLY). */
+ head->read_avail = 0;
+ tomoyo_io_printf(head, "# select %s\n", data);
+ head->read_single_domain = true;
+ head->read_eof = !domain;
+ if (domain) {
+ struct tomoyo_domain_info *d;
+ head->read_var1 = NULL;
+ down_read(&tomoyo_domain_list_lock);
+ list_for_each_entry(d, &tomoyo_domain_list, list) {
+ if (d == domain)
+ break;
+ head->read_var1 = &d->list;
+ }
+ up_read(&tomoyo_domain_list_lock);
+ head->read_var2 = NULL;
+ head->read_bit = 0;
+ head->read_step = 0;
+ if (domain->is_deleted)
+ tomoyo_io_printf(head, "# This is a deleted domain.\n");
+ }
+ return true;
+}
+
+/**
+ * tomoyo_write_domain_policy - Write domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_write_domain_policy(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ struct tomoyo_domain_info *domain = head->write_var1;
+ bool is_delete = false;
+ bool is_select = false;
+ bool is_undelete = false;
+ unsigned int profile;
+
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE))
+ is_delete = true;
+ else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_SELECT))
+ is_select = true;
+ else if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_UNDELETE))
+ is_undelete = true;
+ if (is_select && tomoyo_is_select_one(head, data))
+ return 0;
+ /* Don't allow updating policies by non manager programs. */
+ if (!tomoyo_is_policy_manager())
+ return -EPERM;
+ if (tomoyo_is_domain_def(data)) {
+ domain = NULL;
+ if (is_delete)
+ tomoyo_delete_domain(data);
+ else if (is_select) {
+ down_read(&tomoyo_domain_list_lock);
+ domain = tomoyo_find_domain(data);
+ up_read(&tomoyo_domain_list_lock);
+ } else if (is_undelete)
+ domain = tomoyo_undelete_domain(data);
+ else
+ domain = tomoyo_find_or_assign_new_domain(data, 0);
+ head->write_var1 = domain;
+ return 0;
+ }
+ if (!domain)
+ return -EINVAL;
+
+ if (sscanf(data, TOMOYO_KEYWORD_USE_PROFILE "%u", &profile) == 1
+ && profile < TOMOYO_MAX_PROFILES) {
+ if (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded)
+ domain->profile = (u8) profile;
+ return 0;
+ }
+ if (!strcmp(data, TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ)) {
+ tomoyo_set_domain_flag(domain, is_delete,
+ TOMOYO_DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ);
+ return 0;
+ }
+ return tomoyo_write_file_policy(data, domain, is_delete);
+}
+
+/**
+ * tomoyo_print_single_path_acl - Print a single path ACL entry.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_single_path_acl_record".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_single_path_acl(struct tomoyo_io_buffer *head,
+ struct tomoyo_single_path_acl_record *
+ ptr)
+{
+ int pos;
+ u8 bit;
+ const char *atmark = "";
+ const char *filename;
+ const u16 perm = ptr->perm;
+
+ filename = ptr->filename->name;
+ for (bit = head->read_bit; bit < TOMOYO_MAX_SINGLE_PATH_OPERATION;
+ bit++) {
+ const char *msg;
+ if (!(perm & (1 << bit)))
+ continue;
+ /* Print "read/write" instead of "read" and "write". */
+ if ((bit == TOMOYO_TYPE_READ_ACL ||
+ bit == TOMOYO_TYPE_WRITE_ACL)
+ && (perm & (1 << TOMOYO_TYPE_READ_WRITE_ACL)))
+ continue;
+ msg = tomoyo_sp2keyword(bit);
+ pos = head->read_avail;
+ if (!tomoyo_io_printf(head, "allow_%s %s%s\n", msg,
+ atmark, filename))
+ goto out;
+ }
+ head->read_bit = 0;
+ return true;
+ out:
+ head->read_bit = bit;
+ head->read_avail = pos;
+ return false;
+}
+
+/**
+ * tomoyo_print_double_path_acl - Print a double path ACL entry.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to "struct tomoyo_double_path_acl_record".
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_double_path_acl(struct tomoyo_io_buffer *head,
+ struct tomoyo_double_path_acl_record *
+ ptr)
+{
+ int pos;
+ const char *atmark1 = "";
+ const char *atmark2 = "";
+ const char *filename1;
+ const char *filename2;
+ const u8 perm = ptr->perm;
+ u8 bit;
+
+ filename1 = ptr->filename1->name;
+ filename2 = ptr->filename2->name;
+ for (bit = head->read_bit; bit < TOMOYO_MAX_DOUBLE_PATH_OPERATION;
+ bit++) {
+ const char *msg;
+ if (!(perm & (1 << bit)))
+ continue;
+ msg = tomoyo_dp2keyword(bit);
+ pos = head->read_avail;
+ if (!tomoyo_io_printf(head, "allow_%s %s%s %s%s\n", msg,
+ atmark1, filename1, atmark2, filename2))
+ goto out;
+ }
+ head->read_bit = 0;
+ return true;
+ out:
+ head->read_bit = bit;
+ head->read_avail = pos;
+ return false;
+}
+
+/**
+ * tomoyo_print_entry - Print an ACL entry.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ * @ptr: Pointer to an ACL entry.
+ *
+ * Returns true on success, false otherwise.
+ */
+static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
+ struct tomoyo_acl_info *ptr)
+{
+ const u8 acl_type = tomoyo_acl_type2(ptr);
+
+ if (acl_type & TOMOYO_ACL_DELETED)
+ return true;
+ if (acl_type == TOMOYO_TYPE_SINGLE_PATH_ACL) {
+ struct tomoyo_single_path_acl_record *acl
+ = container_of(ptr,
+ struct tomoyo_single_path_acl_record,
+ head);
+ return tomoyo_print_single_path_acl(head, acl);
+ }
+ if (acl_type == TOMOYO_TYPE_DOUBLE_PATH_ACL) {
+ struct tomoyo_double_path_acl_record *acl
+ = container_of(ptr,
+ struct tomoyo_double_path_acl_record,
+ head);
+ return tomoyo_print_double_path_acl(head, acl);
+ }
+ BUG(); /* This must not happen. */
+ return false;
+}
+
+/**
+ * tomoyo_read_domain_policy - Read domain policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_read_domain_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *dpos;
+ struct list_head *apos;
+ bool done = true;
+
+ if (head->read_eof)
+ return 0;
+ if (head->read_step == 0)
+ head->read_step = 1;
+ down_read(&tomoyo_domain_list_lock);
+ list_for_each_cookie(dpos, head->read_var1, &tomoyo_domain_list) {
+ struct tomoyo_domain_info *domain;
+ const char *quota_exceeded = "";
+ const char *transition_failed = "";
+ const char *ignore_global_allow_read = "";
+ domain = list_entry(dpos, struct tomoyo_domain_info, list);
+ if (head->read_step != 1)
+ goto acl_loop;
+ if (domain->is_deleted && !head->read_single_domain)
+ continue;
+ /* Print domainname and flags. */
+ if (domain->quota_warned)
+ quota_exceeded = "quota_exceeded\n";
+ if (domain->flags & TOMOYO_DOMAIN_FLAGS_TRANSITION_FAILED)
+ transition_failed = "transition_failed\n";
+ if (domain->flags &
+ TOMOYO_DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ)
+ ignore_global_allow_read
+ = TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "\n";
+ if (!tomoyo_io_printf(head,
+ "%s\n" TOMOYO_KEYWORD_USE_PROFILE "%u\n"
+ "%s%s%s\n", domain->domainname->name,
+ domain->profile, quota_exceeded,
+ transition_failed,
+ ignore_global_allow_read)) {
+ done = false;
+ break;
+ }
+ head->read_step = 2;
+acl_loop:
+ if (head->read_step == 3)
+ goto tail_mark;
+ /* Print ACL entries in the domain. */
+ down_read(&tomoyo_domain_acl_info_list_lock);
+ list_for_each_cookie(apos, head->read_var2,
+ &domain->acl_info_list) {
+ struct tomoyo_acl_info *ptr
+ = list_entry(apos, struct tomoyo_acl_info,
+ list);
+ if (!tomoyo_print_entry(head, ptr)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_domain_acl_info_list_lock);
+ if (!done)
+ break;
+ head->read_step = 3;
+tail_mark:
+ if (!tomoyo_io_printf(head, "\n")) {
+ done = false;
+ break;
+ }
+ head->read_step = 1;
+ if (head->read_single_domain)
+ break;
+ }
+ up_read(&tomoyo_domain_list_lock);
+ head->read_eof = done;
+ return 0;
+}
+
+/**
+ * tomoyo_write_domain_profile - Assign profile for specified domain.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, -EINVAL otherwise.
+ *
+ * This is equivalent to doing
+ *
+ * ( echo "select " $domainname; echo "use_profile " $profile ) |
+ * /usr/lib/ccs/loadpolicy -d
+ */
+static int tomoyo_write_domain_profile(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ char *cp = strchr(data, ' ');
+ struct tomoyo_domain_info *domain;
+ unsigned long profile;
+
+ if (!cp)
+ return -EINVAL;
+ *cp = '\0';
+ down_read(&tomoyo_domain_list_lock);
+ domain = tomoyo_find_domain(cp + 1);
+ up_read(&tomoyo_domain_list_lock);
+ if (strict_strtoul(data, 10, &profile))
+ return -EINVAL;
+ if (domain && profile < TOMOYO_MAX_PROFILES
+ && (tomoyo_profile_ptr[profile] || !tomoyo_policy_loaded))
+ domain->profile = (u8) profile;
+ return 0;
+}
+
+/**
+ * tomoyo_read_domain_profile - Read only domainname and profile.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns list of profile number and domainname pairs.
+ *
+ * This is equivalent to doing
+ *
+ * grep -A 1 '^<kernel>' /sys/kernel/security/tomoyo/domain_policy |
+ * awk ' { if ( domainname == "" ) { if ( $1 == "<kernel>" )
+ * domainname = $0; } else if ( $1 == "use_profile" ) {
+ * print $2 " " domainname; domainname = ""; } } ; '
+ */
+static int tomoyo_read_domain_profile(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ if (head->read_eof)
+ return 0;
+ down_read(&tomoyo_domain_list_lock);
+ list_for_each_cookie(pos, head->read_var1, &tomoyo_domain_list) {
+ struct tomoyo_domain_info *domain;
+ domain = list_entry(pos, struct tomoyo_domain_info, list);
+ if (domain->is_deleted)
+ continue;
+ if (!tomoyo_io_printf(head, "%u %s\n", domain->profile,
+ domain->domainname->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_domain_list_lock);
+ head->read_eof = done;
+ return 0;
+}
+
+/**
+ * tomoyo_write_pid: Specify PID to obtain domainname.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+static int tomoyo_write_pid(struct tomoyo_io_buffer *head)
+{
+ unsigned long pid;
+ /* No error check. */
+ strict_strtoul(head->write_buf, 10, &pid);
+ head->read_step = (int) pid;
+ head->read_eof = false;
+ return 0;
+}
+
+/**
+ * tomoyo_read_pid - Get domainname of the specified PID.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns the domainname which the specified PID is in on success,
+ * empty string otherwise.
+ * The PID is specified by tomoyo_write_pid() so that the user can obtain
+ * using read()/write() interface rather than sysctl() interface.
+ */
+static int tomoyo_read_pid(struct tomoyo_io_buffer *head)
+{
+ if (head->read_avail == 0 && !head->read_eof) {
+ const int pid = head->read_step;
+ struct task_struct *p;
+ struct tomoyo_domain_info *domain = NULL;
+ /***** CRITICAL SECTION START *****/
+ read_lock(&tasklist_lock);
+ p = find_task_by_vpid(pid);
+ if (p)
+ domain = tomoyo_real_domain(p);
+ read_unlock(&tasklist_lock);
+ /***** CRITICAL SECTION END *****/
+ if (domain)
+ tomoyo_io_printf(head, "%d %u %s", pid, domain->profile,
+ domain->domainname->name);
+ head->read_eof = true;
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_write_exception_policy - Write exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_write_exception_policy(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ bool is_delete = tomoyo_str_starts(&data, TOMOYO_KEYWORD_DELETE);
+
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_KEEP_DOMAIN))
+ return tomoyo_write_domain_keeper_policy(data, false,
+ is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_KEEP_DOMAIN))
+ return tomoyo_write_domain_keeper_policy(data, true, is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_INITIALIZE_DOMAIN))
+ return tomoyo_write_domain_initializer_policy(data, false,
+ is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN))
+ return tomoyo_write_domain_initializer_policy(data, true,
+ is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALIAS))
+ return tomoyo_write_alias_policy(data, is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_ALLOW_READ))
+ return tomoyo_write_globally_readable_policy(data, is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_FILE_PATTERN))
+ return tomoyo_write_pattern_policy(data, is_delete);
+ if (tomoyo_str_starts(&data, TOMOYO_KEYWORD_DENY_REWRITE))
+ return tomoyo_write_no_rewrite_policy(data, is_delete);
+ return -EINVAL;
+}
+
+/**
+ * tomoyo_read_exception_policy - Read exception policy.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0 on success, -EINVAL otherwise.
+ */
+static int tomoyo_read_exception_policy(struct tomoyo_io_buffer *head)
+{
+ if (!head->read_eof) {
+ switch (head->read_step) {
+ case 0:
+ head->read_var2 = NULL;
+ head->read_step = 1;
+ case 1:
+ if (!tomoyo_read_domain_keeper_policy(head))
+ break;
+ head->read_var2 = NULL;
+ head->read_step = 2;
+ case 2:
+ if (!tomoyo_read_globally_readable_policy(head))
+ break;
+ head->read_var2 = NULL;
+ head->read_step = 3;
+ case 3:
+ head->read_var2 = NULL;
+ head->read_step = 4;
+ case 4:
+ if (!tomoyo_read_domain_initializer_policy(head))
+ break;
+ head->read_var2 = NULL;
+ head->read_step = 5;
+ case 5:
+ if (!tomoyo_read_alias_policy(head))
+ break;
+ head->read_var2 = NULL;
+ head->read_step = 6;
+ case 6:
+ head->read_var2 = NULL;
+ head->read_step = 7;
+ case 7:
+ if (!tomoyo_read_file_pattern(head))
+ break;
+ head->read_var2 = NULL;
+ head->read_step = 8;
+ case 8:
+ if (!tomoyo_read_no_rewrite_policy(head))
+ break;
+ head->read_var2 = NULL;
+ head->read_step = 9;
+ case 9:
+ head->read_eof = true;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+/* path to policy loader */
+static const char *tomoyo_loader = "/sbin/tomoyo-init";
+
+/**
+ * tomoyo_policy_loader_exists - Check whether /sbin/tomoyo-init exists.
+ *
+ * Returns true if /sbin/tomoyo-init exists, false otherwise.
+ */
+static bool tomoyo_policy_loader_exists(void)
+{
+ /*
+ * Don't activate MAC if the policy loader doesn't exist.
+ * If the initrd includes /sbin/init but real-root-dev has not
+ * mounted on / yet, activating MAC will block the system since
+ * policies are not loaded yet.
+ * Thus, let do_execve() call this function everytime.
+ */
+ struct nameidata nd;
+
+ if (path_lookup(tomoyo_loader, LOOKUP_FOLLOW, &nd)) {
+ printk(KERN_INFO "Not activating Mandatory Access Control now "
+ "since %s doesn't exist.\n", tomoyo_loader);
+ return false;
+ }
+ path_put(&nd.path);
+ return true;
+}
+
+/**
+ * tomoyo_load_policy - Run external policy loader to load policy.
+ *
+ * @filename: The program about to start.
+ *
+ * This function checks whether @filename is /sbin/init , and if so
+ * invoke /sbin/tomoyo-init and wait for the termination of /sbin/tomoyo-init
+ * and then continues invocation of /sbin/init.
+ * /sbin/tomoyo-init reads policy files in /etc/tomoyo/ directory and
+ * writes to /sys/kernel/security/tomoyo/ interfaces.
+ *
+ * Returns nothing.
+ */
+void tomoyo_load_policy(const char *filename)
+{
+ char *argv[2];
+ char *envp[3];
+
+ if (tomoyo_policy_loaded)
+ return;
+ /*
+ * Check filename is /sbin/init or /sbin/tomoyo-start.
+ * /sbin/tomoyo-start is a dummy filename in case where /sbin/init can't
+ * be passed.
+ * You can create /sbin/tomoyo-start by
+ * "ln -s /bin/true /sbin/tomoyo-start".
+ */
+ if (strcmp(filename, "/sbin/init") &&
+ strcmp(filename, "/sbin/tomoyo-start"))
+ return;
+ if (!tomoyo_policy_loader_exists())
+ return;
+
+ printk(KERN_INFO "Calling %s to load policy. Please wait.\n",
+ tomoyo_loader);
+ argv[0] = (char *) tomoyo_loader;
+ argv[1] = NULL;
+ envp[0] = "HOME=/";
+ envp[1] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+ envp[2] = NULL;
+ call_usermodehelper(argv[0], argv, envp, 1);
+
+ printk(KERN_INFO "TOMOYO: 2.2.0-pre 2009/02/01\n");
+ printk(KERN_INFO "Mandatory Access Control activated.\n");
+ tomoyo_policy_loaded = true;
+ { /* Check all profiles currently assigned to domains are defined. */
+ struct tomoyo_domain_info *domain;
+ down_read(&tomoyo_domain_list_lock);
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ const u8 profile = domain->profile;
+ if (tomoyo_profile_ptr[profile])
+ continue;
+ panic("Profile %u (used by '%s') not defined.\n",
+ profile, domain->domainname->name);
+ }
+ up_read(&tomoyo_domain_list_lock);
+ }
+}
+
+/**
+ * tomoyo_read_version: Get version.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns version information.
+ */
+static int tomoyo_read_version(struct tomoyo_io_buffer *head)
+{
+ if (!head->read_eof) {
+ tomoyo_io_printf(head, "2.2.0-pre");
+ head->read_eof = true;
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_read_self_domain - Get the current process's domainname.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns the current process's domainname.
+ */
+static int tomoyo_read_self_domain(struct tomoyo_io_buffer *head)
+{
+ if (!head->read_eof) {
+ /*
+ * tomoyo_domain()->domainname != NULL
+ * because every process belongs to a domain and
+ * the domain's name cannot be NULL.
+ */
+ tomoyo_io_printf(head, "%s", tomoyo_domain()->domainname->name);
+ head->read_eof = true;
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_open_control - open() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @type: Type of interface.
+ * @file: Pointer to "struct file".
+ *
+ * Associates policy handler and returns 0 on success, -ENOMEM otherwise.
+ */
+static int tomoyo_open_control(const u8 type, struct file *file)
+{
+ struct tomoyo_io_buffer *head = tomoyo_alloc(sizeof(*head));
+
+ if (!head)
+ return -ENOMEM;
+ mutex_init(&head->io_sem);
+ switch (type) {
+ case TOMOYO_DOMAINPOLICY:
+ /* /sys/kernel/security/tomoyo/domain_policy */
+ head->write = tomoyo_write_domain_policy;
+ head->read = tomoyo_read_domain_policy;
+ break;
+ case TOMOYO_EXCEPTIONPOLICY:
+ /* /sys/kernel/security/tomoyo/exception_policy */
+ head->write = tomoyo_write_exception_policy;
+ head->read = tomoyo_read_exception_policy;
+ break;
+ case TOMOYO_SELFDOMAIN:
+ /* /sys/kernel/security/tomoyo/self_domain */
+ head->read = tomoyo_read_self_domain;
+ break;
+ case TOMOYO_DOMAIN_STATUS:
+ /* /sys/kernel/security/tomoyo/.domain_status */
+ head->write = tomoyo_write_domain_profile;
+ head->read = tomoyo_read_domain_profile;
+ break;
+ case TOMOYO_PROCESS_STATUS:
+ /* /sys/kernel/security/tomoyo/.process_status */
+ head->write = tomoyo_write_pid;
+ head->read = tomoyo_read_pid;
+ break;
+ case TOMOYO_VERSION:
+ /* /sys/kernel/security/tomoyo/version */
+ head->read = tomoyo_read_version;
+ head->readbuf_size = 128;
+ break;
+ case TOMOYO_MEMINFO:
+ /* /sys/kernel/security/tomoyo/meminfo */
+ head->write = tomoyo_write_memory_quota;
+ head->read = tomoyo_read_memory_counter;
+ head->readbuf_size = 512;
+ break;
+ case TOMOYO_PROFILE:
+ /* /sys/kernel/security/tomoyo/profile */
+ head->write = tomoyo_write_profile;
+ head->read = tomoyo_read_profile;
+ break;
+ case TOMOYO_MANAGER:
+ /* /sys/kernel/security/tomoyo/manager */
+ head->write = tomoyo_write_manager_policy;
+ head->read = tomoyo_read_manager_policy;
+ break;
+ }
+ if (!(file->f_mode & FMODE_READ)) {
+ /*
+ * No need to allocate read_buf since it is not opened
+ * for reading.
+ */
+ head->read = NULL;
+ } else {
+ if (!head->readbuf_size)
+ head->readbuf_size = 4096 * 2;
+ head->read_buf = tomoyo_alloc(head->readbuf_size);
+ if (!head->read_buf) {
+ tomoyo_free(head);
+ return -ENOMEM;
+ }
+ }
+ if (!(file->f_mode & FMODE_WRITE)) {
+ /*
+ * No need to allocate write_buf since it is not opened
+ * for writing.
+ */
+ head->write = NULL;
+ } else if (head->write) {
+ head->writebuf_size = 4096 * 2;
+ head->write_buf = tomoyo_alloc(head->writebuf_size);
+ if (!head->write_buf) {
+ tomoyo_free(head->read_buf);
+ tomoyo_free(head);
+ return -ENOMEM;
+ }
+ }
+ file->private_data = head;
+ /*
+ * Call the handler now if the file is
+ * /sys/kernel/security/tomoyo/self_domain
+ * so that the user can use
+ * cat < /sys/kernel/security/tomoyo/self_domain"
+ * to know the current process's domainname.
+ */
+ if (type == TOMOYO_SELFDOMAIN)
+ tomoyo_read_control(file, NULL, 0);
+ return 0;
+}
+
+/**
+ * tomoyo_read_control - read() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buffer: Poiner to buffer to write to.
+ * @buffer_len: Size of @buffer.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+static int tomoyo_read_control(struct file *file, char __user *buffer,
+ const int buffer_len)
+{
+ int len = 0;
+ struct tomoyo_io_buffer *head = file->private_data;
+ char *cp;
+
+ if (!head->read)
+ return -ENOSYS;
+ if (mutex_lock_interruptible(&head->io_sem))
+ return -EINTR;
+ /* Call the policy handler. */
+ len = head->read(head);
+ if (len < 0)
+ goto out;
+ /* Write to buffer. */
+ len = head->read_avail;
+ if (len > buffer_len)
+ len = buffer_len;
+ if (!len)
+ goto out;
+ /* head->read_buf changes by some functions. */
+ cp = head->read_buf;
+ if (copy_to_user(buffer, cp, len)) {
+ len = -EFAULT;
+ goto out;
+ }
+ head->read_avail -= len;
+ memmove(cp, cp + len, head->read_avail);
+ out:
+ mutex_unlock(&head->io_sem);
+ return len;
+}
+
+/**
+ * tomoyo_write_control - write() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buffer: Pointer to buffer to read from.
+ * @buffer_len: Size of @buffer.
+ *
+ * Returns @buffer_len on success, negative value otherwise.
+ */
+static int tomoyo_write_control(struct file *file, const char __user *buffer,
+ const int buffer_len)
+{
+ struct tomoyo_io_buffer *head = file->private_data;
+ int error = buffer_len;
+ int avail_len = buffer_len;
+ char *cp0 = head->write_buf;
+
+ if (!head->write)
+ return -ENOSYS;
+ if (!access_ok(VERIFY_READ, buffer, buffer_len))
+ return -EFAULT;
+ /* Don't allow updating policies by non manager programs. */
+ if (head->write != tomoyo_write_pid &&
+ head->write != tomoyo_write_domain_policy &&
+ !tomoyo_is_policy_manager())
+ return -EPERM;
+ if (mutex_lock_interruptible(&head->io_sem))
+ return -EINTR;
+ /* Read a line and dispatch it to the policy handler. */
+ while (avail_len > 0) {
+ char c;
+ if (head->write_avail >= head->writebuf_size - 1) {
+ error = -ENOMEM;
+ break;
+ } else if (get_user(c, buffer)) {
+ error = -EFAULT;
+ break;
+ }
+ buffer++;
+ avail_len--;
+ cp0[head->write_avail++] = c;
+ if (c != '\n')
+ continue;
+ cp0[head->write_avail - 1] = '\0';
+ head->write_avail = 0;
+ tomoyo_normalize_line(cp0);
+ head->write(head);
+ }
+ mutex_unlock(&head->io_sem);
+ return error;
+}
+
+/**
+ * tomoyo_close_control - close() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ *
+ * Releases memory and returns 0.
+ */
+static int tomoyo_close_control(struct file *file)
+{
+ struct tomoyo_io_buffer *head = file->private_data;
+
+ /* Release memory used for policy I/O. */
+ tomoyo_free(head->read_buf);
+ head->read_buf = NULL;
+ tomoyo_free(head->write_buf);
+ head->write_buf = NULL;
+ tomoyo_free(head);
+ head = NULL;
+ file->private_data = NULL;
+ return 0;
+}
+
+/**
+ * tomoyo_alloc_acl_element - Allocate permanent memory for ACL entry.
+ *
+ * @acl_type: Type of ACL entry.
+ *
+ * Returns pointer to the ACL entry on success, NULL otherwise.
+ */
+void *tomoyo_alloc_acl_element(const u8 acl_type)
+{
+ int len;
+ struct tomoyo_acl_info *ptr;
+
+ switch (acl_type) {
+ case TOMOYO_TYPE_SINGLE_PATH_ACL:
+ len = sizeof(struct tomoyo_single_path_acl_record);
+ break;
+ case TOMOYO_TYPE_DOUBLE_PATH_ACL:
+ len = sizeof(struct tomoyo_double_path_acl_record);
+ break;
+ default:
+ return NULL;
+ }
+ ptr = tomoyo_alloc_element(len);
+ if (!ptr)
+ return NULL;
+ ptr->type = acl_type;
+ return ptr;
+}
+
+/**
+ * tomoyo_open - open() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_open(struct inode *inode, struct file *file)
+{
+ const int key = ((u8 *) file->f_path.dentry->d_inode->i_private)
+ - ((u8 *) NULL);
+ return tomoyo_open_control(key, file);
+}
+
+/**
+ * tomoyo_release - close() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @inode: Pointer to "struct inode".
+ * @file: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_release(struct inode *inode, struct file *file)
+{
+ return tomoyo_close_control(file);
+}
+
+/**
+ * tomoyo_read - read() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buf: Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos: Unused.
+ *
+ * Returns bytes read on success, negative value otherwise.
+ */
+static ssize_t tomoyo_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ return tomoyo_read_control(file, buf, count);
+}
+
+/**
+ * tomoyo_write - write() for /sys/kernel/security/tomoyo/ interface.
+ *
+ * @file: Pointer to "struct file".
+ * @buf: Pointer to buffer.
+ * @count: Size of @buf.
+ * @ppos: Unused.
+ *
+ * Returns @count on success, negative value otherwise.
+ */
+static ssize_t tomoyo_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ return tomoyo_write_control(file, buf, count);
+}
+
+/* Operations for /sys/kernel/security/tomoyo/ interface. */
+static const struct file_operations tomoyo_operations = {
+ .open = tomoyo_open,
+ .release = tomoyo_release,
+ .read = tomoyo_read,
+ .write = tomoyo_write,
+};
+
+/**
+ * tomoyo_create_entry - Create interface files under /sys/kernel/security/tomoyo/ directory.
+ *
+ * @name: The name of the interface file.
+ * @mode: The permission of the interface file.
+ * @parent: The parent directory.
+ * @key: Type of interface.
+ *
+ * Returns nothing.
+ */
+static void __init tomoyo_create_entry(const char *name, const mode_t mode,
+ struct dentry *parent, const u8 key)
+{
+ securityfs_create_file(name, mode, parent, ((u8 *) NULL) + key,
+ &tomoyo_operations);
+}
+
+/**
+ * tomoyo_initerface_init - Initialize /sys/kernel/security/tomoyo/ interface.
+ *
+ * Returns 0.
+ */
+static int __init tomoyo_initerface_init(void)
+{
+ struct dentry *tomoyo_dir;
+
+ /* Don't create securityfs entries unless registered. */
+ if (current_cred()->security != &tomoyo_kernel_domain)
+ return 0;
+
+ tomoyo_dir = securityfs_create_dir("tomoyo", NULL);
+ tomoyo_create_entry("domain_policy", 0600, tomoyo_dir,
+ TOMOYO_DOMAINPOLICY);
+ tomoyo_create_entry("exception_policy", 0600, tomoyo_dir,
+ TOMOYO_EXCEPTIONPOLICY);
+ tomoyo_create_entry("self_domain", 0400, tomoyo_dir,
+ TOMOYO_SELFDOMAIN);
+ tomoyo_create_entry(".domain_status", 0600, tomoyo_dir,
+ TOMOYO_DOMAIN_STATUS);
+ tomoyo_create_entry(".process_status", 0600, tomoyo_dir,
+ TOMOYO_PROCESS_STATUS);
+ tomoyo_create_entry("meminfo", 0600, tomoyo_dir,
+ TOMOYO_MEMINFO);
+ tomoyo_create_entry("profile", 0600, tomoyo_dir,
+ TOMOYO_PROFILE);
+ tomoyo_create_entry("manager", 0600, tomoyo_dir,
+ TOMOYO_MANAGER);
+ tomoyo_create_entry("version", 0400, tomoyo_dir,
+ TOMOYO_VERSION);
+ return 0;
+}
+
+fs_initcall(tomoyo_initerface_init);
diff --git a/security/tomoyo/common.h b/security/tomoyo/common.h
new file mode 100644
index 000000000000..6dcb7cc0ed1d
--- /dev/null
+++ b/security/tomoyo/common.h
@@ -0,0 +1,359 @@
+/*
+ * security/tomoyo/common.h
+ *
+ * Common functions for TOMOYO.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#ifndef _SECURITY_TOMOYO_COMMON_H
+#define _SECURITY_TOMOYO_COMMON_H
+
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/file.h>
+#include <linux/kmod.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/namei.h>
+#include <linux/mount.h>
+#include <linux/list.h>
+
+struct dentry;
+struct vfsmount;
+
+/* Temporary buffer for holding pathnames. */
+struct tomoyo_page_buffer {
+ char buffer[4096];
+};
+
+/* Structure for holding a token. */
+struct tomoyo_path_info {
+ const char *name;
+ u32 hash; /* = full_name_hash(name, strlen(name)) */
+ u16 total_len; /* = strlen(name) */
+ u16 const_len; /* = tomoyo_const_part_length(name) */
+ bool is_dir; /* = tomoyo_strendswith(name, "/") */
+ bool is_patterned; /* = tomoyo_path_contains_pattern(name) */
+ u16 depth; /* = tomoyo_path_depth(name) */
+};
+
+/*
+ * This is the max length of a token.
+ *
+ * A token consists of only ASCII printable characters.
+ * Non printable characters in a token is represented in \ooo style
+ * octal string. Thus, \ itself is represented as \\.
+ */
+#define TOMOYO_MAX_PATHNAME_LEN 4000
+
+/* Structure for holding requested pathname. */
+struct tomoyo_path_info_with_data {
+ /* Keep "head" first, for this pointer is passed to tomoyo_free(). */
+ struct tomoyo_path_info head;
+ char bariier1[16]; /* Safeguard for overrun. */
+ char body[TOMOYO_MAX_PATHNAME_LEN];
+ char barrier2[16]; /* Safeguard for overrun. */
+};
+
+/*
+ * Common header for holding ACL entries.
+ *
+ * Packing "struct tomoyo_acl_info" allows
+ * "struct tomoyo_single_path_acl_record" to embed "u16" and
+ * "struct tomoyo_double_path_acl_record" to embed "u8"
+ * without enlarging their structure size.
+ */
+struct tomoyo_acl_info {
+ struct list_head list;
+ /*
+ * Type of this ACL entry.
+ *
+ * MSB is is_deleted flag.
+ */
+ u8 type;
+} __packed;
+
+/* This ACL entry is deleted. */
+#define TOMOYO_ACL_DELETED 0x80
+
+/* Structure for domain information. */
+struct tomoyo_domain_info {
+ struct list_head list;
+ struct list_head acl_info_list;
+ /* Name of this domain. Never NULL. */
+ const struct tomoyo_path_info *domainname;
+ u8 profile; /* Profile number to use. */
+ u8 is_deleted; /* Delete flag.
+ 0 = active.
+ 1 = deleted but undeletable.
+ 255 = deleted and no longer undeletable. */
+ bool quota_warned; /* Quota warnning flag. */
+ /* DOMAIN_FLAGS_*. Use tomoyo_set_domain_flag() to modify. */
+ u8 flags;
+};
+
+/* Profile number is an integer between 0 and 255. */
+#define TOMOYO_MAX_PROFILES 256
+
+/* Ignore "allow_read" directive in exception policy. */
+#define TOMOYO_DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ 1
+/*
+ * This domain was unable to create a new domain at tomoyo_find_next_domain()
+ * because the name of the domain to be created was too long or
+ * it could not allocate memory.
+ * More than one process continued execve() without domain transition.
+ */
+#define TOMOYO_DOMAIN_FLAGS_TRANSITION_FAILED 2
+
+/*
+ * Structure for "allow_read/write", "allow_execute", "allow_read",
+ * "allow_write", "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
+ * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
+ * "allow_truncate", "allow_symlink" and "allow_rewrite" directive.
+ */
+struct tomoyo_single_path_acl_record {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_SINGLE_PATH_ACL */
+ u16 perm;
+ /* Pointer to single pathname. */
+ const struct tomoyo_path_info *filename;
+};
+
+/* Structure for "allow_rename" and "allow_link" directive. */
+struct tomoyo_double_path_acl_record {
+ struct tomoyo_acl_info head; /* type = TOMOYO_TYPE_DOUBLE_PATH_ACL */
+ u8 perm;
+ /* Pointer to single pathname. */
+ const struct tomoyo_path_info *filename1;
+ /* Pointer to single pathname. */
+ const struct tomoyo_path_info *filename2;
+};
+
+/* Keywords for ACLs. */
+#define TOMOYO_KEYWORD_ALIAS "alias "
+#define TOMOYO_KEYWORD_ALLOW_READ "allow_read "
+#define TOMOYO_KEYWORD_DELETE "delete "
+#define TOMOYO_KEYWORD_DENY_REWRITE "deny_rewrite "
+#define TOMOYO_KEYWORD_FILE_PATTERN "file_pattern "
+#define TOMOYO_KEYWORD_INITIALIZE_DOMAIN "initialize_domain "
+#define TOMOYO_KEYWORD_KEEP_DOMAIN "keep_domain "
+#define TOMOYO_KEYWORD_NO_INITIALIZE_DOMAIN "no_initialize_domain "
+#define TOMOYO_KEYWORD_NO_KEEP_DOMAIN "no_keep_domain "
+#define TOMOYO_KEYWORD_SELECT "select "
+#define TOMOYO_KEYWORD_UNDELETE "undelete "
+#define TOMOYO_KEYWORD_USE_PROFILE "use_profile "
+#define TOMOYO_KEYWORD_IGNORE_GLOBAL_ALLOW_READ "ignore_global_allow_read"
+/* A domain definition starts with <kernel>. */
+#define TOMOYO_ROOT_NAME "<kernel>"
+#define TOMOYO_ROOT_NAME_LEN (sizeof(TOMOYO_ROOT_NAME) - 1)
+
+/* Index numbers for Access Controls. */
+#define TOMOYO_MAC_FOR_FILE 0 /* domain_policy.conf */
+#define TOMOYO_MAX_ACCEPT_ENTRY 1
+#define TOMOYO_VERBOSE 2
+#define TOMOYO_MAX_CONTROL_INDEX 3
+
+/* Structure for reading/writing policy via securityfs interfaces. */
+struct tomoyo_io_buffer {
+ int (*read) (struct tomoyo_io_buffer *);
+ int (*write) (struct tomoyo_io_buffer *);
+ /* Exclusive lock for this structure. */
+ struct mutex io_sem;
+ /* The position currently reading from. */
+ struct list_head *read_var1;
+ /* Extra variables for reading. */
+ struct list_head *read_var2;
+ /* The position currently writing to. */
+ struct tomoyo_domain_info *write_var1;
+ /* The step for reading. */
+ int read_step;
+ /* Buffer for reading. */
+ char *read_buf;
+ /* EOF flag for reading. */
+ bool read_eof;
+ /* Read domain ACL of specified PID? */
+ bool read_single_domain;
+ /* Extra variable for reading. */
+ u8 read_bit;
+ /* Bytes available for reading. */
+ int read_avail;
+ /* Size of read buffer. */
+ int readbuf_size;
+ /* Buffer for writing. */
+ char *write_buf;
+ /* Bytes available for writing. */
+ int write_avail;
+ /* Size of write buffer. */
+ int writebuf_size;
+};
+
+/* Check whether the domain has too many ACL entries to hold. */
+bool tomoyo_domain_quota_is_ok(struct tomoyo_domain_info * const domain);
+/* Transactional sprintf() for policy dump. */
+bool tomoyo_io_printf(struct tomoyo_io_buffer *head, const char *fmt, ...)
+ __attribute__ ((format(printf, 2, 3)));
+/* Check whether the domainname is correct. */
+bool tomoyo_is_correct_domain(const unsigned char *domainname,
+ const char *function);
+/* Check whether the token is correct. */
+bool tomoyo_is_correct_path(const char *filename, const s8 start_type,
+ const s8 pattern_type, const s8 end_type,
+ const char *function);
+/* Check whether the token can be a domainname. */
+bool tomoyo_is_domain_def(const unsigned char *buffer);
+/* Check whether the given filename matches the given pattern. */
+bool tomoyo_path_matches_pattern(const struct tomoyo_path_info *filename,
+ const struct tomoyo_path_info *pattern);
+/* Read "alias" entry in exception policy. */
+bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head);
+/*
+ * Read "initialize_domain" and "no_initialize_domain" entry
+ * in exception policy.
+ */
+bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head);
+/* Read "keep_domain" and "no_keep_domain" entry in exception policy. */
+bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head);
+/* Read "file_pattern" entry in exception policy. */
+bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head);
+/* Read "allow_read" entry in exception policy. */
+bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head);
+/* Read "deny_rewrite" entry in exception policy. */
+bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head);
+/* Write domain policy violation warning message to console? */
+bool tomoyo_verbose_mode(const struct tomoyo_domain_info *domain);
+/* Convert double path operation to operation name. */
+const char *tomoyo_dp2keyword(const u8 operation);
+/* Get the last component of the given domainname. */
+const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain);
+/* Get warning message. */
+const char *tomoyo_get_msg(const bool is_enforce);
+/* Convert single path operation to operation name. */
+const char *tomoyo_sp2keyword(const u8 operation);
+/* Delete a domain. */
+int tomoyo_delete_domain(char *data);
+/* Create "alias" entry in exception policy. */
+int tomoyo_write_alias_policy(char *data, const bool is_delete);
+/*
+ * Create "initialize_domain" and "no_initialize_domain" entry
+ * in exception policy.
+ */
+int tomoyo_write_domain_initializer_policy(char *data, const bool is_not,
+ const bool is_delete);
+/* Create "keep_domain" and "no_keep_domain" entry in exception policy. */
+int tomoyo_write_domain_keeper_policy(char *data, const bool is_not,
+ const bool is_delete);
+/*
+ * Create "allow_read/write", "allow_execute", "allow_read", "allow_write",
+ * "allow_create", "allow_unlink", "allow_mkdir", "allow_rmdir",
+ * "allow_mkfifo", "allow_mksock", "allow_mkblock", "allow_mkchar",
+ * "allow_truncate", "allow_symlink", "allow_rewrite", "allow_rename" and
+ * "allow_link" entry in domain policy.
+ */
+int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
+ const bool is_delete);
+/* Create "allow_read" entry in exception policy. */
+int tomoyo_write_globally_readable_policy(char *data, const bool is_delete);
+/* Create "deny_rewrite" entry in exception policy. */
+int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete);
+/* Create "file_pattern" entry in exception policy. */
+int tomoyo_write_pattern_policy(char *data, const bool is_delete);
+/* Find a domain by the given name. */
+struct tomoyo_domain_info *tomoyo_find_domain(const char *domainname);
+/* Find or create a domain by the given name. */
+struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
+ domainname,
+ const u8 profile);
+/* Undelete a domain. */
+struct tomoyo_domain_info *tomoyo_undelete_domain(const char *domainname);
+/* Check mode for specified functionality. */
+unsigned int tomoyo_check_flags(const struct tomoyo_domain_info *domain,
+ const u8 index);
+/* Allocate memory for structures. */
+void *tomoyo_alloc_acl_element(const u8 acl_type);
+/* Fill in "struct tomoyo_path_info" members. */
+void tomoyo_fill_path_info(struct tomoyo_path_info *ptr);
+/* Run policy loader when /sbin/init starts. */
+void tomoyo_load_policy(const char *filename);
+/* Change "struct tomoyo_domain_info"->flags. */
+void tomoyo_set_domain_flag(struct tomoyo_domain_info *domain,
+ const bool is_delete, const u8 flags);
+
+/* strcmp() for "struct tomoyo_path_info" structure. */
+static inline bool tomoyo_pathcmp(const struct tomoyo_path_info *a,
+ const struct tomoyo_path_info *b)
+{
+ return a->hash != b->hash || strcmp(a->name, b->name);
+}
+
+/* Get type of an ACL entry. */
+static inline u8 tomoyo_acl_type1(struct tomoyo_acl_info *ptr)
+{
+ return ptr->type & ~TOMOYO_ACL_DELETED;
+}
+
+/* Get type of an ACL entry. */
+static inline u8 tomoyo_acl_type2(struct tomoyo_acl_info *ptr)
+{
+ return ptr->type;
+}
+
+/**
+ * tomoyo_is_valid - Check whether the character is a valid char.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is a valid character, false otherwise.
+ */
+static inline bool tomoyo_is_valid(const unsigned char c)
+{
+ return c > ' ' && c < 127;
+}
+
+/**
+ * tomoyo_is_invalid - Check whether the character is an invalid char.
+ *
+ * @c: The character to check.
+ *
+ * Returns true if @c is an invalid character, false otherwise.
+ */
+static inline bool tomoyo_is_invalid(const unsigned char c)
+{
+ return c && (c <= ' ' || c >= 127);
+}
+
+/* The list for "struct tomoyo_domain_info". */
+extern struct list_head tomoyo_domain_list;
+extern struct rw_semaphore tomoyo_domain_list_lock;
+
+/* Lock for domain->acl_info_list. */
+extern struct rw_semaphore tomoyo_domain_acl_info_list_lock;
+
+/* Has /sbin/init started? */
+extern bool tomoyo_policy_loaded;
+
+/* The kernel's domain. */
+extern struct tomoyo_domain_info tomoyo_kernel_domain;
+
+/**
+ * list_for_each_cookie - iterate over a list with cookie.
+ * @pos: the &struct list_head to use as a loop cursor.
+ * @cookie: the &struct list_head to use as a cookie.
+ * @head: the head for your list.
+ *
+ * Same with list_for_each() except that this primitive uses @cookie
+ * so that we can continue iteration.
+ * @cookie must be NULL when iteration starts, and @cookie will become
+ * NULL when iteration finishes.
+ */
+#define list_for_each_cookie(pos, cookie, head) \
+ for (({ if (!cookie) \
+ cookie = head; }), \
+ pos = (cookie)->next; \
+ prefetch(pos->next), pos != (head) || ((cookie) = NULL); \
+ (cookie) = pos, pos = pos->next)
+
+#endif /* !defined(_SECURITY_TOMOYO_COMMON_H) */
diff --git a/security/tomoyo/domain.c b/security/tomoyo/domain.c
new file mode 100644
index 000000000000..093a756030bd
--- /dev/null
+++ b/security/tomoyo/domain.c
@@ -0,0 +1,878 @@
+/*
+ * security/tomoyo/domain.c
+ *
+ * Implementation of the Domain-Based Mandatory Access Control.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#include "common.h"
+#include "tomoyo.h"
+#include "realpath.h"
+#include <linux/binfmts.h>
+
+/* Variables definitions.*/
+
+/* The initial domain. */
+struct tomoyo_domain_info tomoyo_kernel_domain;
+
+/* The list for "struct tomoyo_domain_info". */
+LIST_HEAD(tomoyo_domain_list);
+DECLARE_RWSEM(tomoyo_domain_list_lock);
+
+/* Structure for "initialize_domain" and "no_initialize_domain" keyword. */
+struct tomoyo_domain_initializer_entry {
+ struct list_head list;
+ const struct tomoyo_path_info *domainname; /* This may be NULL */
+ const struct tomoyo_path_info *program;
+ bool is_deleted;
+ bool is_not; /* True if this entry is "no_initialize_domain". */
+ /* True if the domainname is tomoyo_get_last_name(). */
+ bool is_last_name;
+};
+
+/* Structure for "keep_domain" and "no_keep_domain" keyword. */
+struct tomoyo_domain_keeper_entry {
+ struct list_head list;
+ const struct tomoyo_path_info *domainname;
+ const struct tomoyo_path_info *program; /* This may be NULL */
+ bool is_deleted;
+ bool is_not; /* True if this entry is "no_keep_domain". */
+ /* True if the domainname is tomoyo_get_last_name(). */
+ bool is_last_name;
+};
+
+/* Structure for "alias" keyword. */
+struct tomoyo_alias_entry {
+ struct list_head list;
+ const struct tomoyo_path_info *original_name;
+ const struct tomoyo_path_info *aliased_name;
+ bool is_deleted;
+};
+
+/**
+ * tomoyo_set_domain_flag - Set or clear domain's attribute flags.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ * @flags: Flags to set or clear.
+ *
+ * Returns nothing.
+ */
+void tomoyo_set_domain_flag(struct tomoyo_domain_info *domain,
+ const bool is_delete, const u8 flags)
+{
+ /* We need to serialize because this is bitfield operation. */
+ static DEFINE_SPINLOCK(lock);
+ /***** CRITICAL SECTION START *****/
+ spin_lock(&lock);
+ if (!is_delete)
+ domain->flags |= flags;
+ else
+ domain->flags &= ~flags;
+ spin_unlock(&lock);
+ /***** CRITICAL SECTION END *****/
+}
+
+/**
+ * tomoyo_get_last_name - Get last component of a domainname.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ *
+ * Returns the last component of the domainname.
+ */
+const char *tomoyo_get_last_name(const struct tomoyo_domain_info *domain)
+{
+ const char *cp0 = domain->domainname->name;
+ const char *cp1 = strrchr(cp0, ' ');
+
+ if (cp1)
+ return cp1 + 1;
+ return cp0;
+}
+
+/* The list for "struct tomoyo_domain_initializer_entry". */
+static LIST_HEAD(tomoyo_domain_initializer_list);
+static DECLARE_RWSEM(tomoyo_domain_initializer_list_lock);
+
+/**
+ * tomoyo_update_domain_initializer_entry - Update "struct tomoyo_domain_initializer_entry" list.
+ *
+ * @domainname: The name of domain. May be NULL.
+ * @program: The name of program.
+ * @is_not: True if it is "no_initialize_domain" entry.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_domain_initializer_entry(const char *domainname,
+ const char *program,
+ const bool is_not,
+ const bool is_delete)
+{
+ struct tomoyo_domain_initializer_entry *new_entry;
+ struct tomoyo_domain_initializer_entry *ptr;
+ const struct tomoyo_path_info *saved_program;
+ const struct tomoyo_path_info *saved_domainname = NULL;
+ int error = -ENOMEM;
+ bool is_last_name = false;
+
+ if (!tomoyo_is_correct_path(program, 1, -1, -1, __func__))
+ return -EINVAL; /* No patterns allowed. */
+ if (domainname) {
+ if (!tomoyo_is_domain_def(domainname) &&
+ tomoyo_is_correct_path(domainname, 1, -1, -1, __func__))
+ is_last_name = true;
+ else if (!tomoyo_is_correct_domain(domainname, __func__))
+ return -EINVAL;
+ saved_domainname = tomoyo_save_name(domainname);
+ if (!saved_domainname)
+ return -ENOMEM;
+ }
+ saved_program = tomoyo_save_name(program);
+ if (!saved_program)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_initializer_list_lock);
+ list_for_each_entry(ptr, &tomoyo_domain_initializer_list, list) {
+ if (ptr->is_not != is_not ||
+ ptr->domainname != saved_domainname ||
+ ptr->program != saved_program)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->domainname = saved_domainname;
+ new_entry->program = saved_program;
+ new_entry->is_not = is_not;
+ new_entry->is_last_name = is_last_name;
+ list_add_tail(&new_entry->list, &tomoyo_domain_initializer_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_domain_initializer_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_read_domain_initializer_policy - Read "struct tomoyo_domain_initializer_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_read_domain_initializer_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ down_read(&tomoyo_domain_initializer_list_lock);
+ list_for_each_cookie(pos, head->read_var2,
+ &tomoyo_domain_initializer_list) {
+ const char *no;
+ const char *from = "";
+ const char *domain = "";
+ struct tomoyo_domain_initializer_entry *ptr;
+ ptr = list_entry(pos, struct tomoyo_domain_initializer_entry,
+ list);
+ if (ptr->is_deleted)
+ continue;
+ no = ptr->is_not ? "no_" : "";
+ if (ptr->domainname) {
+ from = " from ";
+ domain = ptr->domainname->name;
+ }
+ if (!tomoyo_io_printf(head,
+ "%s" TOMOYO_KEYWORD_INITIALIZE_DOMAIN
+ "%s%s%s\n", no, ptr->program->name, from,
+ domain)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_domain_initializer_list_lock);
+ return done;
+}
+
+/**
+ * tomoyo_write_domain_initializer_policy - Write "struct tomoyo_domain_initializer_entry" list.
+ *
+ * @data: String to parse.
+ * @is_not: True if it is "no_initialize_domain" entry.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_domain_initializer_policy(char *data, const bool is_not,
+ const bool is_delete)
+{
+ char *cp = strstr(data, " from ");
+
+ if (cp) {
+ *cp = '\0';
+ return tomoyo_update_domain_initializer_entry(cp + 6, data,
+ is_not,
+ is_delete);
+ }
+ return tomoyo_update_domain_initializer_entry(NULL, data, is_not,
+ is_delete);
+}
+
+/**
+ * tomoyo_is_domain_initializer - Check whether the given program causes domainname reinitialization.
+ *
+ * @domainname: The name of domain.
+ * @program: The name of program.
+ * @last_name: The last component of @domainname.
+ *
+ * Returns true if executing @program reinitializes domain transition,
+ * false otherwise.
+ */
+static bool tomoyo_is_domain_initializer(const struct tomoyo_path_info *
+ domainname,
+ const struct tomoyo_path_info *program,
+ const struct tomoyo_path_info *
+ last_name)
+{
+ struct tomoyo_domain_initializer_entry *ptr;
+ bool flag = false;
+
+ down_read(&tomoyo_domain_initializer_list_lock);
+ list_for_each_entry(ptr, &tomoyo_domain_initializer_list, list) {
+ if (ptr->is_deleted)
+ continue;
+ if (ptr->domainname) {
+ if (!ptr->is_last_name) {
+ if (ptr->domainname != domainname)
+ continue;
+ } else {
+ if (tomoyo_pathcmp(ptr->domainname, last_name))
+ continue;
+ }
+ }
+ if (tomoyo_pathcmp(ptr->program, program))
+ continue;
+ if (ptr->is_not) {
+ flag = false;
+ break;
+ }
+ flag = true;
+ }
+ up_read(&tomoyo_domain_initializer_list_lock);
+ return flag;
+}
+
+/* The list for "struct tomoyo_domain_keeper_entry". */
+static LIST_HEAD(tomoyo_domain_keeper_list);
+static DECLARE_RWSEM(tomoyo_domain_keeper_list_lock);
+
+/**
+ * tomoyo_update_domain_keeper_entry - Update "struct tomoyo_domain_keeper_entry" list.
+ *
+ * @domainname: The name of domain.
+ * @program: The name of program. May be NULL.
+ * @is_not: True if it is "no_keep_domain" entry.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_domain_keeper_entry(const char *domainname,
+ const char *program,
+ const bool is_not,
+ const bool is_delete)
+{
+ struct tomoyo_domain_keeper_entry *new_entry;
+ struct tomoyo_domain_keeper_entry *ptr;
+ const struct tomoyo_path_info *saved_domainname;
+ const struct tomoyo_path_info *saved_program = NULL;
+ static DEFINE_MUTEX(lock);
+ int error = -ENOMEM;
+ bool is_last_name = false;
+
+ if (!tomoyo_is_domain_def(domainname) &&
+ tomoyo_is_correct_path(domainname, 1, -1, -1, __func__))
+ is_last_name = true;
+ else if (!tomoyo_is_correct_domain(domainname, __func__))
+ return -EINVAL;
+ if (program) {
+ if (!tomoyo_is_correct_path(program, 1, -1, -1, __func__))
+ return -EINVAL;
+ saved_program = tomoyo_save_name(program);
+ if (!saved_program)
+ return -ENOMEM;
+ }
+ saved_domainname = tomoyo_save_name(domainname);
+ if (!saved_domainname)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_keeper_list_lock);
+ list_for_each_entry(ptr, &tomoyo_domain_keeper_list, list) {
+ if (ptr->is_not != is_not ||
+ ptr->domainname != saved_domainname ||
+ ptr->program != saved_program)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->domainname = saved_domainname;
+ new_entry->program = saved_program;
+ new_entry->is_not = is_not;
+ new_entry->is_last_name = is_last_name;
+ list_add_tail(&new_entry->list, &tomoyo_domain_keeper_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_domain_keeper_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_write_domain_keeper_policy - Write "struct tomoyo_domain_keeper_entry" list.
+ *
+ * @data: String to parse.
+ * @is_not: True if it is "no_keep_domain" entry.
+ * @is_delete: True if it is a delete request.
+ *
+ */
+int tomoyo_write_domain_keeper_policy(char *data, const bool is_not,
+ const bool is_delete)
+{
+ char *cp = strstr(data, " from ");
+
+ if (cp) {
+ *cp = '\0';
+ return tomoyo_update_domain_keeper_entry(cp + 6, data, is_not,
+ is_delete);
+ }
+ return tomoyo_update_domain_keeper_entry(data, NULL, is_not, is_delete);
+}
+
+/**
+ * tomoyo_read_domain_keeper_policy - Read "struct tomoyo_domain_keeper_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_read_domain_keeper_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ down_read(&tomoyo_domain_keeper_list_lock);
+ list_for_each_cookie(pos, head->read_var2,
+ &tomoyo_domain_keeper_list) {
+ struct tomoyo_domain_keeper_entry *ptr;
+ const char *no;
+ const char *from = "";
+ const char *program = "";
+
+ ptr = list_entry(pos, struct tomoyo_domain_keeper_entry, list);
+ if (ptr->is_deleted)
+ continue;
+ no = ptr->is_not ? "no_" : "";
+ if (ptr->program) {
+ from = " from ";
+ program = ptr->program->name;
+ }
+ if (!tomoyo_io_printf(head,
+ "%s" TOMOYO_KEYWORD_KEEP_DOMAIN
+ "%s%s%s\n", no, program, from,
+ ptr->domainname->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_domain_keeper_list_lock);
+ return done;
+}
+
+/**
+ * tomoyo_is_domain_keeper - Check whether the given program causes domain transition suppression.
+ *
+ * @domainname: The name of domain.
+ * @program: The name of program.
+ * @last_name: The last component of @domainname.
+ *
+ * Returns true if executing @program supresses domain transition,
+ * false otherwise.
+ */
+static bool tomoyo_is_domain_keeper(const struct tomoyo_path_info *domainname,
+ const struct tomoyo_path_info *program,
+ const struct tomoyo_path_info *last_name)
+{
+ struct tomoyo_domain_keeper_entry *ptr;
+ bool flag = false;
+
+ down_read(&tomoyo_domain_keeper_list_lock);
+ list_for_each_entry(ptr, &tomoyo_domain_keeper_list, list) {
+ if (ptr->is_deleted)
+ continue;
+ if (!ptr->is_last_name) {
+ if (ptr->domainname != domainname)
+ continue;
+ } else {
+ if (tomoyo_pathcmp(ptr->domainname, last_name))
+ continue;
+ }
+ if (ptr->program && tomoyo_pathcmp(ptr->program, program))
+ continue;
+ if (ptr->is_not) {
+ flag = false;
+ break;
+ }
+ flag = true;
+ }
+ up_read(&tomoyo_domain_keeper_list_lock);
+ return flag;
+}
+
+/* The list for "struct tomoyo_alias_entry". */
+static LIST_HEAD(tomoyo_alias_list);
+static DECLARE_RWSEM(tomoyo_alias_list_lock);
+
+/**
+ * tomoyo_update_alias_entry - Update "struct tomoyo_alias_entry" list.
+ *
+ * @original_name: The original program's real name.
+ * @aliased_name: The symbolic program's symbolic link's name.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_alias_entry(const char *original_name,
+ const char *aliased_name,
+ const bool is_delete)
+{
+ struct tomoyo_alias_entry *new_entry;
+ struct tomoyo_alias_entry *ptr;
+ const struct tomoyo_path_info *saved_original_name;
+ const struct tomoyo_path_info *saved_aliased_name;
+ int error = -ENOMEM;
+
+ if (!tomoyo_is_correct_path(original_name, 1, -1, -1, __func__) ||
+ !tomoyo_is_correct_path(aliased_name, 1, -1, -1, __func__))
+ return -EINVAL; /* No patterns allowed. */
+ saved_original_name = tomoyo_save_name(original_name);
+ saved_aliased_name = tomoyo_save_name(aliased_name);
+ if (!saved_original_name || !saved_aliased_name)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_alias_list_lock);
+ list_for_each_entry(ptr, &tomoyo_alias_list, list) {
+ if (ptr->original_name != saved_original_name ||
+ ptr->aliased_name != saved_aliased_name)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->original_name = saved_original_name;
+ new_entry->aliased_name = saved_aliased_name;
+ list_add_tail(&new_entry->list, &tomoyo_alias_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_alias_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_read_alias_policy - Read "struct tomoyo_alias_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_read_alias_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ down_read(&tomoyo_alias_list_lock);
+ list_for_each_cookie(pos, head->read_var2, &tomoyo_alias_list) {
+ struct tomoyo_alias_entry *ptr;
+
+ ptr = list_entry(pos, struct tomoyo_alias_entry, list);
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALIAS "%s %s\n",
+ ptr->original_name->name,
+ ptr->aliased_name->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_alias_list_lock);
+ return done;
+}
+
+/**
+ * tomoyo_write_alias_policy - Write "struct tomoyo_alias_entry" list.
+ *
+ * @data: String to parse.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_alias_policy(char *data, const bool is_delete)
+{
+ char *cp = strchr(data, ' ');
+
+ if (!cp)
+ return -EINVAL;
+ *cp++ = '\0';
+ return tomoyo_update_alias_entry(data, cp, is_delete);
+}
+
+/* Domain create/delete/undelete handler. */
+
+/* #define TOMOYO_DEBUG_DOMAIN_UNDELETE */
+
+/**
+ * tomoyo_delete_domain - Delete a domain.
+ *
+ * @domainname: The name of domain.
+ *
+ * Returns 0.
+ */
+int tomoyo_delete_domain(char *domainname)
+{
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_path_info name;
+
+ name.name = domainname;
+ tomoyo_fill_path_info(&name);
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_list_lock);
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ printk(KERN_DEBUG "tomoyo_delete_domain %s\n", domainname);
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ if (tomoyo_pathcmp(domain->domainname, &name))
+ continue;
+ printk(KERN_DEBUG "List: %p %u\n", domain, domain->is_deleted);
+ }
+#endif
+ /* Is there an active domain? */
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ struct tomoyo_domain_info *domain2;
+ /* Never delete tomoyo_kernel_domain */
+ if (domain == &tomoyo_kernel_domain)
+ continue;
+ if (domain->is_deleted ||
+ tomoyo_pathcmp(domain->domainname, &name))
+ continue;
+ /* Mark already deleted domains as non undeletable. */
+ list_for_each_entry(domain2, &tomoyo_domain_list, list) {
+ if (!domain2->is_deleted ||
+ tomoyo_pathcmp(domain2->domainname, &name))
+ continue;
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ if (domain2->is_deleted != 255)
+ printk(KERN_DEBUG
+ "Marked %p as non undeletable\n",
+ domain2);
+#endif
+ domain2->is_deleted = 255;
+ }
+ /* Delete and mark active domain as undeletable. */
+ domain->is_deleted = 1;
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ printk(KERN_DEBUG "Marked %p as undeletable\n", domain);
+#endif
+ break;
+ }
+ up_write(&tomoyo_domain_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return 0;
+}
+
+/**
+ * tomoyo_undelete_domain - Undelete a domain.
+ *
+ * @domainname: The name of domain.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise.
+ */
+struct tomoyo_domain_info *tomoyo_undelete_domain(const char *domainname)
+{
+ struct tomoyo_domain_info *domain;
+ struct tomoyo_domain_info *candidate_domain = NULL;
+ struct tomoyo_path_info name;
+
+ name.name = domainname;
+ tomoyo_fill_path_info(&name);
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_list_lock);
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ printk(KERN_DEBUG "tomoyo_undelete_domain %s\n", domainname);
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ if (tomoyo_pathcmp(domain->domainname, &name))
+ continue;
+ printk(KERN_DEBUG "List: %p %u\n", domain, domain->is_deleted);
+ }
+#endif
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ if (tomoyo_pathcmp(&name, domain->domainname))
+ continue;
+ if (!domain->is_deleted) {
+ /* This domain is active. I can't undelete. */
+ candidate_domain = NULL;
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ printk(KERN_DEBUG "%p is active. I can't undelete.\n",
+ domain);
+#endif
+ break;
+ }
+ /* Is this domain undeletable? */
+ if (domain->is_deleted == 1)
+ candidate_domain = domain;
+ }
+ if (candidate_domain) {
+ candidate_domain->is_deleted = 0;
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ printk(KERN_DEBUG "%p was undeleted.\n", candidate_domain);
+#endif
+ }
+ up_write(&tomoyo_domain_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return candidate_domain;
+}
+
+/**
+ * tomoyo_find_or_assign_new_domain - Create a domain.
+ *
+ * @domainname: The name of domain.
+ * @profile: Profile number to assign if the domain was newly created.
+ *
+ * Returns pointer to "struct tomoyo_domain_info" on success, NULL otherwise.
+ */
+struct tomoyo_domain_info *tomoyo_find_or_assign_new_domain(const char *
+ domainname,
+ const u8 profile)
+{
+ struct tomoyo_domain_info *domain = NULL;
+ const struct tomoyo_path_info *saved_domainname;
+
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_list_lock);
+ domain = tomoyo_find_domain(domainname);
+ if (domain)
+ goto out;
+ if (!tomoyo_is_correct_domain(domainname, __func__))
+ goto out;
+ saved_domainname = tomoyo_save_name(domainname);
+ if (!saved_domainname)
+ goto out;
+ /* Can I reuse memory of deleted domain? */
+ list_for_each_entry(domain, &tomoyo_domain_list, list) {
+ struct task_struct *p;
+ struct tomoyo_acl_info *ptr;
+ bool flag;
+ if (!domain->is_deleted ||
+ domain->domainname != saved_domainname)
+ continue;
+ flag = false;
+ /***** CRITICAL SECTION START *****/
+ read_lock(&tasklist_lock);
+ for_each_process(p) {
+ if (tomoyo_real_domain(p) != domain)
+ continue;
+ flag = true;
+ break;
+ }
+ read_unlock(&tasklist_lock);
+ /***** CRITICAL SECTION END *****/
+ if (flag)
+ continue;
+#ifdef TOMOYO_DEBUG_DOMAIN_UNDELETE
+ printk(KERN_DEBUG "Reusing %p %s\n", domain,
+ domain->domainname->name);
+#endif
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ ptr->type |= TOMOYO_ACL_DELETED;
+ }
+ tomoyo_set_domain_flag(domain, true, domain->flags);
+ domain->profile = profile;
+ domain->quota_warned = false;
+ mb(); /* Avoid out-of-order execution. */
+ domain->is_deleted = 0;
+ goto out;
+ }
+ /* No memory reusable. Create using new memory. */
+ domain = tomoyo_alloc_element(sizeof(*domain));
+ if (domain) {
+ INIT_LIST_HEAD(&domain->acl_info_list);
+ domain->domainname = saved_domainname;
+ domain->profile = profile;
+ list_add_tail(&domain->list, &tomoyo_domain_list);
+ }
+ out:
+ up_write(&tomoyo_domain_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return domain;
+}
+
+/**
+ * tomoyo_find_next_domain - Find a domain.
+ *
+ * @bprm: Pointer to "struct linux_binprm".
+ * @next_domain: Pointer to pointer to "struct tomoyo_domain_info".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_find_next_domain(struct linux_binprm *bprm,
+ struct tomoyo_domain_info **next_domain)
+{
+ /*
+ * This function assumes that the size of buffer returned by
+ * tomoyo_realpath() = TOMOYO_MAX_PATHNAME_LEN.
+ */
+ struct tomoyo_page_buffer *tmp = tomoyo_alloc(sizeof(*tmp));
+ struct tomoyo_domain_info *old_domain = tomoyo_domain();
+ struct tomoyo_domain_info *domain = NULL;
+ const char *old_domain_name = old_domain->domainname->name;
+ const char *original_name = bprm->filename;
+ char *new_domain_name = NULL;
+ char *real_program_name = NULL;
+ char *symlink_program_name = NULL;
+ const u8 mode = tomoyo_check_flags(old_domain, TOMOYO_MAC_FOR_FILE);
+ const bool is_enforce = (mode == 3);
+ int retval = -ENOMEM;
+ struct tomoyo_path_info r; /* real name */
+ struct tomoyo_path_info s; /* symlink name */
+ struct tomoyo_path_info l; /* last name */
+ static bool initialized;
+
+ if (!tmp)
+ goto out;
+
+ if (!initialized) {
+ /*
+ * Built-in initializers. This is needed because policies are
+ * not loaded until starting /sbin/init.
+ */
+ tomoyo_update_domain_initializer_entry(NULL, "/sbin/hotplug",
+ false, false);
+ tomoyo_update_domain_initializer_entry(NULL, "/sbin/modprobe",
+ false, false);
+ initialized = true;
+ }
+
+ /* Get tomoyo_realpath of program. */
+ retval = -ENOENT;
+ /* I hope tomoyo_realpath() won't fail with -ENOMEM. */
+ real_program_name = tomoyo_realpath(original_name);
+ if (!real_program_name)
+ goto out;
+ /* Get tomoyo_realpath of symbolic link. */
+ symlink_program_name = tomoyo_realpath_nofollow(original_name);
+ if (!symlink_program_name)
+ goto out;
+
+ r.name = real_program_name;
+ tomoyo_fill_path_info(&r);
+ s.name = symlink_program_name;
+ tomoyo_fill_path_info(&s);
+ l.name = tomoyo_get_last_name(old_domain);
+ tomoyo_fill_path_info(&l);
+
+ /* Check 'alias' directive. */
+ if (tomoyo_pathcmp(&r, &s)) {
+ struct tomoyo_alias_entry *ptr;
+ /* Is this program allowed to be called via symbolic links? */
+ down_read(&tomoyo_alias_list_lock);
+ list_for_each_entry(ptr, &tomoyo_alias_list, list) {
+ if (ptr->is_deleted ||
+ tomoyo_pathcmp(&r, ptr->original_name) ||
+ tomoyo_pathcmp(&s, ptr->aliased_name))
+ continue;
+ memset(real_program_name, 0, TOMOYO_MAX_PATHNAME_LEN);
+ strncpy(real_program_name, ptr->aliased_name->name,
+ TOMOYO_MAX_PATHNAME_LEN - 1);
+ tomoyo_fill_path_info(&r);
+ break;
+ }
+ up_read(&tomoyo_alias_list_lock);
+ }
+
+ /* Check execute permission. */
+ retval = tomoyo_check_exec_perm(old_domain, &r, tmp);
+ if (retval < 0)
+ goto out;
+
+ new_domain_name = tmp->buffer;
+ if (tomoyo_is_domain_initializer(old_domain->domainname, &r, &l)) {
+ /* Transit to the child of tomoyo_kernel_domain domain. */
+ snprintf(new_domain_name, TOMOYO_MAX_PATHNAME_LEN + 1,
+ TOMOYO_ROOT_NAME " " "%s", real_program_name);
+ } else if (old_domain == &tomoyo_kernel_domain &&
+ !tomoyo_policy_loaded) {
+ /*
+ * Needn't to transit from kernel domain before starting
+ * /sbin/init. But transit from kernel domain if executing
+ * initializers because they might start before /sbin/init.
+ */
+ domain = old_domain;
+ } else if (tomoyo_is_domain_keeper(old_domain->domainname, &r, &l)) {
+ /* Keep current domain. */
+ domain = old_domain;
+ } else {
+ /* Normal domain transition. */
+ snprintf(new_domain_name, TOMOYO_MAX_PATHNAME_LEN + 1,
+ "%s %s", old_domain_name, real_program_name);
+ }
+ if (domain || strlen(new_domain_name) >= TOMOYO_MAX_PATHNAME_LEN)
+ goto done;
+ down_read(&tomoyo_domain_list_lock);
+ domain = tomoyo_find_domain(new_domain_name);
+ up_read(&tomoyo_domain_list_lock);
+ if (domain)
+ goto done;
+ if (is_enforce)
+ goto done;
+ domain = tomoyo_find_or_assign_new_domain(new_domain_name,
+ old_domain->profile);
+ done:
+ if (domain)
+ goto out;
+ printk(KERN_WARNING "TOMOYO-ERROR: Domain '%s' not defined.\n",
+ new_domain_name);
+ if (is_enforce)
+ retval = -EPERM;
+ else
+ tomoyo_set_domain_flag(old_domain, false,
+ TOMOYO_DOMAIN_FLAGS_TRANSITION_FAILED);
+ out:
+ tomoyo_free(real_program_name);
+ tomoyo_free(symlink_program_name);
+ *next_domain = domain ? domain : old_domain;
+ tomoyo_free(tmp);
+ return retval;
+}
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
new file mode 100644
index 000000000000..65f50c1c5ee9
--- /dev/null
+++ b/security/tomoyo/file.c
@@ -0,0 +1,1241 @@
+/*
+ * security/tomoyo/file.c
+ *
+ * Implementation of the Domain-Based Mandatory Access Control.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#include "common.h"
+#include "tomoyo.h"
+#include "realpath.h"
+#define ACC_MODE(x) ("\000\004\002\006"[(x)&O_ACCMODE])
+
+/* Structure for "allow_read" keyword. */
+struct tomoyo_globally_readable_file_entry {
+ struct list_head list;
+ const struct tomoyo_path_info *filename;
+ bool is_deleted;
+};
+
+/* Structure for "file_pattern" keyword. */
+struct tomoyo_pattern_entry {
+ struct list_head list;
+ const struct tomoyo_path_info *pattern;
+ bool is_deleted;
+};
+
+/* Structure for "deny_rewrite" keyword. */
+struct tomoyo_no_rewrite_entry {
+ struct list_head list;
+ const struct tomoyo_path_info *pattern;
+ bool is_deleted;
+};
+
+/* Keyword array for single path operations. */
+static const char *tomoyo_sp_keyword[TOMOYO_MAX_SINGLE_PATH_OPERATION] = {
+ [TOMOYO_TYPE_READ_WRITE_ACL] = "read/write",
+ [TOMOYO_TYPE_EXECUTE_ACL] = "execute",
+ [TOMOYO_TYPE_READ_ACL] = "read",
+ [TOMOYO_TYPE_WRITE_ACL] = "write",
+ [TOMOYO_TYPE_CREATE_ACL] = "create",
+ [TOMOYO_TYPE_UNLINK_ACL] = "unlink",
+ [TOMOYO_TYPE_MKDIR_ACL] = "mkdir",
+ [TOMOYO_TYPE_RMDIR_ACL] = "rmdir",
+ [TOMOYO_TYPE_MKFIFO_ACL] = "mkfifo",
+ [TOMOYO_TYPE_MKSOCK_ACL] = "mksock",
+ [TOMOYO_TYPE_MKBLOCK_ACL] = "mkblock",
+ [TOMOYO_TYPE_MKCHAR_ACL] = "mkchar",
+ [TOMOYO_TYPE_TRUNCATE_ACL] = "truncate",
+ [TOMOYO_TYPE_SYMLINK_ACL] = "symlink",
+ [TOMOYO_TYPE_REWRITE_ACL] = "rewrite",
+};
+
+/* Keyword array for double path operations. */
+static const char *tomoyo_dp_keyword[TOMOYO_MAX_DOUBLE_PATH_OPERATION] = {
+ [TOMOYO_TYPE_LINK_ACL] = "link",
+ [TOMOYO_TYPE_RENAME_ACL] = "rename",
+};
+
+/**
+ * tomoyo_sp2keyword - Get the name of single path operation.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns the name of single path operation.
+ */
+const char *tomoyo_sp2keyword(const u8 operation)
+{
+ return (operation < TOMOYO_MAX_SINGLE_PATH_OPERATION)
+ ? tomoyo_sp_keyword[operation] : NULL;
+}
+
+/**
+ * tomoyo_dp2keyword - Get the name of double path operation.
+ *
+ * @operation: Type of operation.
+ *
+ * Returns the name of double path operation.
+ */
+const char *tomoyo_dp2keyword(const u8 operation)
+{
+ return (operation < TOMOYO_MAX_DOUBLE_PATH_OPERATION)
+ ? tomoyo_dp_keyword[operation] : NULL;
+}
+
+/**
+ * tomoyo_strendswith - Check whether the token ends with the given token.
+ *
+ * @name: The token to check.
+ * @tail: The token to find.
+ *
+ * Returns true if @name ends with @tail, false otherwise.
+ */
+static bool tomoyo_strendswith(const char *name, const char *tail)
+{
+ int len;
+
+ if (!name || !tail)
+ return false;
+ len = strlen(name) - strlen(tail);
+ return len >= 0 && !strcmp(name + len, tail);
+}
+
+/**
+ * tomoyo_get_path - Get realpath.
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
+ */
+static struct tomoyo_path_info *tomoyo_get_path(struct path *path)
+{
+ int error;
+ struct tomoyo_path_info_with_data *buf = tomoyo_alloc(sizeof(*buf));
+
+ if (!buf)
+ return NULL;
+ /* Reserve one byte for appending "/". */
+ error = tomoyo_realpath_from_path2(path, buf->body,
+ sizeof(buf->body) - 2);
+ if (!error) {
+ buf->head.name = buf->body;
+ tomoyo_fill_path_info(&buf->head);
+ return &buf->head;
+ }
+ tomoyo_free(buf);
+ return NULL;
+}
+
+/* Lock for domain->acl_info_list. */
+DECLARE_RWSEM(tomoyo_domain_acl_info_list_lock);
+
+static int tomoyo_update_double_path_acl(const u8 type, const char *filename1,
+ const char *filename2,
+ struct tomoyo_domain_info *
+ const domain, const bool is_delete);
+static int tomoyo_update_single_path_acl(const u8 type, const char *filename,
+ struct tomoyo_domain_info *
+ const domain, const bool is_delete);
+
+/* The list for "struct tomoyo_globally_readable_file_entry". */
+static LIST_HEAD(tomoyo_globally_readable_list);
+static DECLARE_RWSEM(tomoyo_globally_readable_list_lock);
+
+/**
+ * tomoyo_update_globally_readable_entry - Update "struct tomoyo_globally_readable_file_entry" list.
+ *
+ * @filename: Filename unconditionally permitted to open() for reading.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_globally_readable_entry(const char *filename,
+ const bool is_delete)
+{
+ struct tomoyo_globally_readable_file_entry *new_entry;
+ struct tomoyo_globally_readable_file_entry *ptr;
+ const struct tomoyo_path_info *saved_filename;
+ int error = -ENOMEM;
+
+ if (!tomoyo_is_correct_path(filename, 1, 0, -1, __func__))
+ return -EINVAL;
+ saved_filename = tomoyo_save_name(filename);
+ if (!saved_filename)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_globally_readable_list_lock);
+ list_for_each_entry(ptr, &tomoyo_globally_readable_list, list) {
+ if (ptr->filename != saved_filename)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->filename = saved_filename;
+ list_add_tail(&new_entry->list, &tomoyo_globally_readable_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_globally_readable_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_is_globally_readable_file - Check if the file is unconditionnaly permitted to be open()ed for reading.
+ *
+ * @filename: The filename to check.
+ *
+ * Returns true if any domain can open @filename for reading, false otherwise.
+ */
+static bool tomoyo_is_globally_readable_file(const struct tomoyo_path_info *
+ filename)
+{
+ struct tomoyo_globally_readable_file_entry *ptr;
+ bool found = false;
+ down_read(&tomoyo_globally_readable_list_lock);
+ list_for_each_entry(ptr, &tomoyo_globally_readable_list, list) {
+ if (!ptr->is_deleted &&
+ tomoyo_path_matches_pattern(filename, ptr->filename)) {
+ found = true;
+ break;
+ }
+ }
+ up_read(&tomoyo_globally_readable_list_lock);
+ return found;
+}
+
+/**
+ * tomoyo_write_globally_readable_policy - Write "struct tomoyo_globally_readable_file_entry" list.
+ *
+ * @data: String to parse.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_globally_readable_policy(char *data, const bool is_delete)
+{
+ return tomoyo_update_globally_readable_entry(data, is_delete);
+}
+
+/**
+ * tomoyo_read_globally_readable_policy - Read "struct tomoyo_globally_readable_file_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_read_globally_readable_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ down_read(&tomoyo_globally_readable_list_lock);
+ list_for_each_cookie(pos, head->read_var2,
+ &tomoyo_globally_readable_list) {
+ struct tomoyo_globally_readable_file_entry *ptr;
+ ptr = list_entry(pos,
+ struct tomoyo_globally_readable_file_entry,
+ list);
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_ALLOW_READ "%s\n",
+ ptr->filename->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_globally_readable_list_lock);
+ return done;
+}
+
+/* The list for "struct tomoyo_pattern_entry". */
+static LIST_HEAD(tomoyo_pattern_list);
+static DECLARE_RWSEM(tomoyo_pattern_list_lock);
+
+/**
+ * tomoyo_update_file_pattern_entry - Update "struct tomoyo_pattern_entry" list.
+ *
+ * @pattern: Pathname pattern.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_file_pattern_entry(const char *pattern,
+ const bool is_delete)
+{
+ struct tomoyo_pattern_entry *new_entry;
+ struct tomoyo_pattern_entry *ptr;
+ const struct tomoyo_path_info *saved_pattern;
+ int error = -ENOMEM;
+
+ if (!tomoyo_is_correct_path(pattern, 0, 1, 0, __func__))
+ return -EINVAL;
+ saved_pattern = tomoyo_save_name(pattern);
+ if (!saved_pattern)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_pattern_list_lock);
+ list_for_each_entry(ptr, &tomoyo_pattern_list, list) {
+ if (saved_pattern != ptr->pattern)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->pattern = saved_pattern;
+ list_add_tail(&new_entry->list, &tomoyo_pattern_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_pattern_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_get_file_pattern - Get patterned pathname.
+ *
+ * @filename: The filename to find patterned pathname.
+ *
+ * Returns pointer to pathname pattern if matched, @filename otherwise.
+ */
+static const struct tomoyo_path_info *
+tomoyo_get_file_pattern(const struct tomoyo_path_info *filename)
+{
+ struct tomoyo_pattern_entry *ptr;
+ const struct tomoyo_path_info *pattern = NULL;
+
+ down_read(&tomoyo_pattern_list_lock);
+ list_for_each_entry(ptr, &tomoyo_pattern_list, list) {
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
+ continue;
+ pattern = ptr->pattern;
+ if (tomoyo_strendswith(pattern->name, "/\\*")) {
+ /* Do nothing. Try to find the better match. */
+ } else {
+ /* This would be the better match. Use this. */
+ break;
+ }
+ }
+ up_read(&tomoyo_pattern_list_lock);
+ if (pattern)
+ filename = pattern;
+ return filename;
+}
+
+/**
+ * tomoyo_write_pattern_policy - Write "struct tomoyo_pattern_entry" list.
+ *
+ * @data: String to parse.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_pattern_policy(char *data, const bool is_delete)
+{
+ return tomoyo_update_file_pattern_entry(data, is_delete);
+}
+
+/**
+ * tomoyo_read_file_pattern - Read "struct tomoyo_pattern_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_read_file_pattern(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ down_read(&tomoyo_pattern_list_lock);
+ list_for_each_cookie(pos, head->read_var2, &tomoyo_pattern_list) {
+ struct tomoyo_pattern_entry *ptr;
+ ptr = list_entry(pos, struct tomoyo_pattern_entry, list);
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_FILE_PATTERN "%s\n",
+ ptr->pattern->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_pattern_list_lock);
+ return done;
+}
+
+/* The list for "struct tomoyo_no_rewrite_entry". */
+static LIST_HEAD(tomoyo_no_rewrite_list);
+static DECLARE_RWSEM(tomoyo_no_rewrite_list_lock);
+
+/**
+ * tomoyo_update_no_rewrite_entry - Update "struct tomoyo_no_rewrite_entry" list.
+ *
+ * @pattern: Pathname pattern that are not rewritable by default.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_no_rewrite_entry(const char *pattern,
+ const bool is_delete)
+{
+ struct tomoyo_no_rewrite_entry *new_entry, *ptr;
+ const struct tomoyo_path_info *saved_pattern;
+ int error = -ENOMEM;
+
+ if (!tomoyo_is_correct_path(pattern, 0, 0, 0, __func__))
+ return -EINVAL;
+ saved_pattern = tomoyo_save_name(pattern);
+ if (!saved_pattern)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_no_rewrite_list_lock);
+ list_for_each_entry(ptr, &tomoyo_no_rewrite_list, list) {
+ if (ptr->pattern != saved_pattern)
+ continue;
+ ptr->is_deleted = is_delete;
+ error = 0;
+ goto out;
+ }
+ if (is_delete) {
+ error = -ENOENT;
+ goto out;
+ }
+ new_entry = tomoyo_alloc_element(sizeof(*new_entry));
+ if (!new_entry)
+ goto out;
+ new_entry->pattern = saved_pattern;
+ list_add_tail(&new_entry->list, &tomoyo_no_rewrite_list);
+ error = 0;
+ out:
+ up_write(&tomoyo_no_rewrite_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_is_no_rewrite_file - Check if the given pathname is not permitted to be rewrited.
+ *
+ * @filename: Filename to check.
+ *
+ * Returns true if @filename is specified by "deny_rewrite" directive,
+ * false otherwise.
+ */
+static bool tomoyo_is_no_rewrite_file(const struct tomoyo_path_info *filename)
+{
+ struct tomoyo_no_rewrite_entry *ptr;
+ bool found = false;
+
+ down_read(&tomoyo_no_rewrite_list_lock);
+ list_for_each_entry(ptr, &tomoyo_no_rewrite_list, list) {
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_path_matches_pattern(filename, ptr->pattern))
+ continue;
+ found = true;
+ break;
+ }
+ up_read(&tomoyo_no_rewrite_list_lock);
+ return found;
+}
+
+/**
+ * tomoyo_write_no_rewrite_policy - Write "struct tomoyo_no_rewrite_entry" list.
+ *
+ * @data: String to parse.
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_no_rewrite_policy(char *data, const bool is_delete)
+{
+ return tomoyo_update_no_rewrite_entry(data, is_delete);
+}
+
+/**
+ * tomoyo_read_no_rewrite_policy - Read "struct tomoyo_no_rewrite_entry" list.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns true on success, false otherwise.
+ */
+bool tomoyo_read_no_rewrite_policy(struct tomoyo_io_buffer *head)
+{
+ struct list_head *pos;
+ bool done = true;
+
+ down_read(&tomoyo_no_rewrite_list_lock);
+ list_for_each_cookie(pos, head->read_var2, &tomoyo_no_rewrite_list) {
+ struct tomoyo_no_rewrite_entry *ptr;
+ ptr = list_entry(pos, struct tomoyo_no_rewrite_entry, list);
+ if (ptr->is_deleted)
+ continue;
+ if (!tomoyo_io_printf(head, TOMOYO_KEYWORD_DENY_REWRITE "%s\n",
+ ptr->pattern->name)) {
+ done = false;
+ break;
+ }
+ }
+ up_read(&tomoyo_no_rewrite_list_lock);
+ return done;
+}
+
+/**
+ * tomoyo_update_file_acl - Update file's read/write/execute ACL.
+ *
+ * @filename: Filename.
+ * @perm: Permission (between 1 to 7).
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * This is legacy support interface for older policy syntax.
+ * Current policy syntax uses "allow_read/write" instead of "6",
+ * "allow_read" instead of "4", "allow_write" instead of "2",
+ * "allow_execute" instead of "1".
+ */
+static int tomoyo_update_file_acl(const char *filename, u8 perm,
+ struct tomoyo_domain_info * const domain,
+ const bool is_delete)
+{
+ if (perm > 7 || !perm) {
+ printk(KERN_DEBUG "%s: Invalid permission '%d %s'\n",
+ __func__, perm, filename);
+ return -EINVAL;
+ }
+ if (filename[0] != '@' && tomoyo_strendswith(filename, "/"))
+ /*
+ * Only 'allow_mkdir' and 'allow_rmdir' are valid for
+ * directory permissions.
+ */
+ return 0;
+ if (perm & 4)
+ tomoyo_update_single_path_acl(TOMOYO_TYPE_READ_ACL, filename,
+ domain, is_delete);
+ if (perm & 2)
+ tomoyo_update_single_path_acl(TOMOYO_TYPE_WRITE_ACL, filename,
+ domain, is_delete);
+ if (perm & 1)
+ tomoyo_update_single_path_acl(TOMOYO_TYPE_EXECUTE_ACL,
+ filename, domain, is_delete);
+ return 0;
+}
+
+/**
+ * tomoyo_check_single_path_acl2 - Check permission for single path operation.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @filename: Filename to check.
+ * @perm: Permission.
+ * @may_use_pattern: True if patterned ACL is permitted.
+ *
+ * Returns 0 on success, -EPERM otherwise.
+ */
+static int tomoyo_check_single_path_acl2(const struct tomoyo_domain_info *
+ domain,
+ const struct tomoyo_path_info *
+ filename,
+ const u16 perm,
+ const bool may_use_pattern)
+{
+ struct tomoyo_acl_info *ptr;
+ int error = -EPERM;
+
+ down_read(&tomoyo_domain_acl_info_list_lock);
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ struct tomoyo_single_path_acl_record *acl;
+ if (tomoyo_acl_type2(ptr) != TOMOYO_TYPE_SINGLE_PATH_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_single_path_acl_record,
+ head);
+ if (!(acl->perm & perm))
+ continue;
+ if (may_use_pattern || !acl->filename->is_patterned) {
+ if (!tomoyo_path_matches_pattern(filename,
+ acl->filename))
+ continue;
+ } else {
+ continue;
+ }
+ error = 0;
+ break;
+ }
+ up_read(&tomoyo_domain_acl_info_list_lock);
+ return error;
+}
+
+/**
+ * tomoyo_check_file_acl - Check permission for opening files.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @filename: Filename to check.
+ * @operation: Mode ("read" or "write" or "read/write" or "execute").
+ *
+ * Returns 0 on success, -EPERM otherwise.
+ */
+static int tomoyo_check_file_acl(const struct tomoyo_domain_info *domain,
+ const struct tomoyo_path_info *filename,
+ const u8 operation)
+{
+ u16 perm = 0;
+
+ if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
+ return 0;
+ if (operation == 6)
+ perm = 1 << TOMOYO_TYPE_READ_WRITE_ACL;
+ else if (operation == 4)
+ perm = 1 << TOMOYO_TYPE_READ_ACL;
+ else if (operation == 2)
+ perm = 1 << TOMOYO_TYPE_WRITE_ACL;
+ else if (operation == 1)
+ perm = 1 << TOMOYO_TYPE_EXECUTE_ACL;
+ else
+ BUG();
+ return tomoyo_check_single_path_acl2(domain, filename, perm,
+ operation != 1);
+}
+
+/**
+ * tomoyo_check_file_perm2 - Check permission for opening files.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @filename: Filename to check.
+ * @perm: Mode ("read" or "write" or "read/write" or "execute").
+ * @operation: Operation name passed used for verbose mode.
+ * @mode: Access control mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_check_file_perm2(struct tomoyo_domain_info * const domain,
+ const struct tomoyo_path_info *filename,
+ const u8 perm, const char *operation,
+ const u8 mode)
+{
+ const bool is_enforce = (mode == 3);
+ const char *msg = "<unknown>";
+ int error = 0;
+
+ if (!filename)
+ return 0;
+ error = tomoyo_check_file_acl(domain, filename, perm);
+ if (error && perm == 4 &&
+ (domain->flags & TOMOYO_DOMAIN_FLAGS_IGNORE_GLOBAL_ALLOW_READ) == 0
+ && tomoyo_is_globally_readable_file(filename))
+ error = 0;
+ if (perm == 6)
+ msg = tomoyo_sp2keyword(TOMOYO_TYPE_READ_WRITE_ACL);
+ else if (perm == 4)
+ msg = tomoyo_sp2keyword(TOMOYO_TYPE_READ_ACL);
+ else if (perm == 2)
+ msg = tomoyo_sp2keyword(TOMOYO_TYPE_WRITE_ACL);
+ else if (perm == 1)
+ msg = tomoyo_sp2keyword(TOMOYO_TYPE_EXECUTE_ACL);
+ else
+ BUG();
+ if (!error)
+ return 0;
+ if (tomoyo_verbose_mode(domain))
+ printk(KERN_WARNING "TOMOYO-%s: Access '%s(%s) %s' denied "
+ "for %s\n", tomoyo_get_msg(is_enforce), msg, operation,
+ filename->name, tomoyo_get_last_name(domain));
+ if (is_enforce)
+ return error;
+ if (mode == 1 && tomoyo_domain_quota_is_ok(domain)) {
+ /* Don't use patterns for execute permission. */
+ const struct tomoyo_path_info *patterned_file = (perm != 1) ?
+ tomoyo_get_file_pattern(filename) : filename;
+ tomoyo_update_file_acl(patterned_file->name, perm,
+ domain, false);
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_write_file_policy - Update file related list.
+ *
+ * @data: String to parse.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_write_file_policy(char *data, struct tomoyo_domain_info *domain,
+ const bool is_delete)
+{
+ char *filename = strchr(data, ' ');
+ char *filename2;
+ unsigned int perm;
+ u8 type;
+
+ if (!filename)
+ return -EINVAL;
+ *filename++ = '\0';
+ if (sscanf(data, "%u", &perm) == 1)
+ return tomoyo_update_file_acl(filename, (u8) perm, domain,
+ is_delete);
+ if (strncmp(data, "allow_", 6))
+ goto out;
+ data += 6;
+ for (type = 0; type < TOMOYO_MAX_SINGLE_PATH_OPERATION; type++) {
+ if (strcmp(data, tomoyo_sp_keyword[type]))
+ continue;
+ return tomoyo_update_single_path_acl(type, filename,
+ domain, is_delete);
+ }
+ filename2 = strchr(filename, ' ');
+ if (!filename2)
+ goto out;
+ *filename2++ = '\0';
+ for (type = 0; type < TOMOYO_MAX_DOUBLE_PATH_OPERATION; type++) {
+ if (strcmp(data, tomoyo_dp_keyword[type]))
+ continue;
+ return tomoyo_update_double_path_acl(type, filename, filename2,
+ domain, is_delete);
+ }
+ out:
+ return -EINVAL;
+}
+
+/**
+ * tomoyo_update_single_path_acl - Update "struct tomoyo_single_path_acl_record" list.
+ *
+ * @type: Type of operation.
+ * @filename: Filename.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_single_path_acl(const u8 type, const char *filename,
+ struct tomoyo_domain_info *
+ const domain, const bool is_delete)
+{
+ static const u16 rw_mask =
+ (1 << TOMOYO_TYPE_READ_ACL) | (1 << TOMOYO_TYPE_WRITE_ACL);
+ const struct tomoyo_path_info *saved_filename;
+ struct tomoyo_acl_info *ptr;
+ struct tomoyo_single_path_acl_record *acl;
+ int error = -ENOMEM;
+ const u16 perm = 1 << type;
+
+ if (!domain)
+ return -EINVAL;
+ if (!tomoyo_is_correct_path(filename, 0, 0, 0, __func__))
+ return -EINVAL;
+ saved_filename = tomoyo_save_name(filename);
+ if (!saved_filename)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_acl_info_list_lock);
+ if (is_delete)
+ goto delete;
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ if (tomoyo_acl_type1(ptr) != TOMOYO_TYPE_SINGLE_PATH_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_single_path_acl_record,
+ head);
+ if (acl->filename != saved_filename)
+ continue;
+ /* Special case. Clear all bits if marked as deleted. */
+ if (ptr->type & TOMOYO_ACL_DELETED)
+ acl->perm = 0;
+ acl->perm |= perm;
+ if ((acl->perm & rw_mask) == rw_mask)
+ acl->perm |= 1 << TOMOYO_TYPE_READ_WRITE_ACL;
+ else if (acl->perm & (1 << TOMOYO_TYPE_READ_WRITE_ACL))
+ acl->perm |= rw_mask;
+ ptr->type &= ~TOMOYO_ACL_DELETED;
+ error = 0;
+ goto out;
+ }
+ /* Not found. Append it to the tail. */
+ acl = tomoyo_alloc_acl_element(TOMOYO_TYPE_SINGLE_PATH_ACL);
+ if (!acl)
+ goto out;
+ acl->perm = perm;
+ if (perm == (1 << TOMOYO_TYPE_READ_WRITE_ACL))
+ acl->perm |= rw_mask;
+ acl->filename = saved_filename;
+ list_add_tail(&acl->head.list, &domain->acl_info_list);
+ error = 0;
+ goto out;
+ delete:
+ error = -ENOENT;
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ if (tomoyo_acl_type2(ptr) != TOMOYO_TYPE_SINGLE_PATH_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_single_path_acl_record,
+ head);
+ if (acl->filename != saved_filename)
+ continue;
+ acl->perm &= ~perm;
+ if ((acl->perm & rw_mask) != rw_mask)
+ acl->perm &= ~(1 << TOMOYO_TYPE_READ_WRITE_ACL);
+ else if (!(acl->perm & (1 << TOMOYO_TYPE_READ_WRITE_ACL)))
+ acl->perm &= ~rw_mask;
+ if (!acl->perm)
+ ptr->type |= TOMOYO_ACL_DELETED;
+ error = 0;
+ break;
+ }
+ out:
+ up_write(&tomoyo_domain_acl_info_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_update_double_path_acl - Update "struct tomoyo_double_path_acl_record" list.
+ *
+ * @type: Type of operation.
+ * @filename1: First filename.
+ * @filename2: Second filename.
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @is_delete: True if it is a delete request.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_update_double_path_acl(const u8 type, const char *filename1,
+ const char *filename2,
+ struct tomoyo_domain_info *
+ const domain, const bool is_delete)
+{
+ const struct tomoyo_path_info *saved_filename1;
+ const struct tomoyo_path_info *saved_filename2;
+ struct tomoyo_acl_info *ptr;
+ struct tomoyo_double_path_acl_record *acl;
+ int error = -ENOMEM;
+ const u8 perm = 1 << type;
+
+ if (!domain)
+ return -EINVAL;
+ if (!tomoyo_is_correct_path(filename1, 0, 0, 0, __func__) ||
+ !tomoyo_is_correct_path(filename2, 0, 0, 0, __func__))
+ return -EINVAL;
+ saved_filename1 = tomoyo_save_name(filename1);
+ saved_filename2 = tomoyo_save_name(filename2);
+ if (!saved_filename1 || !saved_filename2)
+ return -ENOMEM;
+ /***** EXCLUSIVE SECTION START *****/
+ down_write(&tomoyo_domain_acl_info_list_lock);
+ if (is_delete)
+ goto delete;
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ if (tomoyo_acl_type1(ptr) != TOMOYO_TYPE_DOUBLE_PATH_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_double_path_acl_record,
+ head);
+ if (acl->filename1 != saved_filename1 ||
+ acl->filename2 != saved_filename2)
+ continue;
+ /* Special case. Clear all bits if marked as deleted. */
+ if (ptr->type & TOMOYO_ACL_DELETED)
+ acl->perm = 0;
+ acl->perm |= perm;
+ ptr->type &= ~TOMOYO_ACL_DELETED;
+ error = 0;
+ goto out;
+ }
+ /* Not found. Append it to the tail. */
+ acl = tomoyo_alloc_acl_element(TOMOYO_TYPE_DOUBLE_PATH_ACL);
+ if (!acl)
+ goto out;
+ acl->perm = perm;
+ acl->filename1 = saved_filename1;
+ acl->filename2 = saved_filename2;
+ list_add_tail(&acl->head.list, &domain->acl_info_list);
+ error = 0;
+ goto out;
+ delete:
+ error = -ENOENT;
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ if (tomoyo_acl_type2(ptr) != TOMOYO_TYPE_DOUBLE_PATH_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_double_path_acl_record,
+ head);
+ if (acl->filename1 != saved_filename1 ||
+ acl->filename2 != saved_filename2)
+ continue;
+ acl->perm &= ~perm;
+ if (!acl->perm)
+ ptr->type |= TOMOYO_ACL_DELETED;
+ error = 0;
+ break;
+ }
+ out:
+ up_write(&tomoyo_domain_acl_info_list_lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return error;
+}
+
+/**
+ * tomoyo_check_single_path_acl - Check permission for single path operation.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @type: Type of operation.
+ * @filename: Filename to check.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_check_single_path_acl(struct tomoyo_domain_info *domain,
+ const u8 type,
+ const struct tomoyo_path_info *filename)
+{
+ if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
+ return 0;
+ return tomoyo_check_single_path_acl2(domain, filename, 1 << type, 1);
+}
+
+/**
+ * tomoyo_check_double_path_acl - Check permission for double path operation.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @type: Type of operation.
+ * @filename1: First filename to check.
+ * @filename2: Second filename to check.
+ *
+ * Returns 0 on success, -EPERM otherwise.
+ */
+static int tomoyo_check_double_path_acl(const struct tomoyo_domain_info *domain,
+ const u8 type,
+ const struct tomoyo_path_info *
+ filename1,
+ const struct tomoyo_path_info *
+ filename2)
+{
+ struct tomoyo_acl_info *ptr;
+ const u8 perm = 1 << type;
+ int error = -EPERM;
+
+ if (!tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE))
+ return 0;
+ down_read(&tomoyo_domain_acl_info_list_lock);
+ list_for_each_entry(ptr, &domain->acl_info_list, list) {
+ struct tomoyo_double_path_acl_record *acl;
+ if (tomoyo_acl_type2(ptr) != TOMOYO_TYPE_DOUBLE_PATH_ACL)
+ continue;
+ acl = container_of(ptr, struct tomoyo_double_path_acl_record,
+ head);
+ if (!(acl->perm & perm))
+ continue;
+ if (!tomoyo_path_matches_pattern(filename1, acl->filename1))
+ continue;
+ if (!tomoyo_path_matches_pattern(filename2, acl->filename2))
+ continue;
+ error = 0;
+ break;
+ }
+ up_read(&tomoyo_domain_acl_info_list_lock);
+ return error;
+}
+
+/**
+ * tomoyo_check_single_path_permission2 - Check permission for single path operation.
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @operation: Type of operation.
+ * @filename: Filename to check.
+ * @mode: Access control mode.
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+static int tomoyo_check_single_path_permission2(struct tomoyo_domain_info *
+ const domain, u8 operation,
+ const struct tomoyo_path_info *
+ filename, const u8 mode)
+{
+ const char *msg;
+ int error;
+ const bool is_enforce = (mode == 3);
+
+ if (!mode)
+ return 0;
+ next:
+ error = tomoyo_check_single_path_acl(domain, operation, filename);
+ msg = tomoyo_sp2keyword(operation);
+ if (!error)
+ goto ok;
+ if (tomoyo_verbose_mode(domain))
+ printk(KERN_WARNING "TOMOYO-%s: Access '%s %s' denied for %s\n",
+ tomoyo_get_msg(is_enforce), msg, filename->name,
+ tomoyo_get_last_name(domain));
+ if (mode == 1 && tomoyo_domain_quota_is_ok(domain)) {
+ const char *name = tomoyo_get_file_pattern(filename)->name;
+ tomoyo_update_single_path_acl(operation, name, domain, false);
+ }
+ if (!is_enforce)
+ error = 0;
+ ok:
+ /*
+ * Since "allow_truncate" doesn't imply "allow_rewrite" permission,
+ * we need to check "allow_rewrite" permission if the filename is
+ * specified by "deny_rewrite" keyword.
+ */
+ if (!error && operation == TOMOYO_TYPE_TRUNCATE_ACL &&
+ tomoyo_is_no_rewrite_file(filename)) {
+ operation = TOMOYO_TYPE_REWRITE_ACL;
+ goto next;
+ }
+ return error;
+}
+
+/**
+ * tomoyo_check_file_perm - Check permission for sysctl()'s "read" and "write".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @filename: Filename to check.
+ * @perm: Mode ("read" or "write" or "read/write").
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_check_file_perm(struct tomoyo_domain_info *domain,
+ const char *filename, const u8 perm)
+{
+ struct tomoyo_path_info name;
+ const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+
+ if (!mode)
+ return 0;
+ name.name = filename;
+ tomoyo_fill_path_info(&name);
+ return tomoyo_check_file_perm2(domain, &name, perm, "sysctl", mode);
+}
+
+/**
+ * tomoyo_check_exec_perm - Check permission for "execute".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @filename: Check permission for "execute".
+ * @tmp: Buffer for temporary use.
+ *
+ * Returns 0 on success, negativevalue otherwise.
+ */
+int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
+ const struct tomoyo_path_info *filename,
+ struct tomoyo_page_buffer *tmp)
+{
+ const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+
+ if (!mode)
+ return 0;
+ return tomoyo_check_file_perm2(domain, filename, 1, "do_execve", mode);
+}
+
+/**
+ * tomoyo_check_open_permission - Check permission for "read" and "write".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @path: Pointer to "struct path".
+ * @flag: Flags for open().
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
+ struct path *path, const int flag)
+{
+ const u8 acc_mode = ACC_MODE(flag);
+ int error = -ENOMEM;
+ struct tomoyo_path_info *buf;
+ const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+ const bool is_enforce = (mode == 3);
+
+ if (!mode || !path->mnt)
+ return 0;
+ if (acc_mode == 0)
+ return 0;
+ if (path->dentry->d_inode && S_ISDIR(path->dentry->d_inode->i_mode))
+ /*
+ * I don't check directories here because mkdir() and rmdir()
+ * don't call me.
+ */
+ return 0;
+ buf = tomoyo_get_path(path);
+ if (!buf)
+ goto out;
+ error = 0;
+ /*
+ * If the filename is specified by "deny_rewrite" keyword,
+ * we need to check "allow_rewrite" permission when the filename is not
+ * opened for append mode or the filename is truncated at open time.
+ */
+ if ((acc_mode & MAY_WRITE) &&
+ ((flag & O_TRUNC) || !(flag & O_APPEND)) &&
+ (tomoyo_is_no_rewrite_file(buf))) {
+ error = tomoyo_check_single_path_permission2(domain,
+ TOMOYO_TYPE_REWRITE_ACL,
+ buf, mode);
+ }
+ if (!error)
+ error = tomoyo_check_file_perm2(domain, buf, acc_mode, "open",
+ mode);
+ if (!error && (flag & O_TRUNC))
+ error = tomoyo_check_single_path_permission2(domain,
+ TOMOYO_TYPE_TRUNCATE_ACL,
+ buf, mode);
+ out:
+ tomoyo_free(buf);
+ if (!is_enforce)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_check_1path_perm - Check permission for "create", "unlink", "mkdir", "rmdir", "mkfifo", "mksock", "mkblock", "mkchar", "truncate" and "symlink".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @operation: Type of operation.
+ * @path: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_check_1path_perm(struct tomoyo_domain_info *domain,
+ const u8 operation, struct path *path)
+{
+ int error = -ENOMEM;
+ struct tomoyo_path_info *buf;
+ const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+ const bool is_enforce = (mode == 3);
+
+ if (!mode || !path->mnt)
+ return 0;
+ buf = tomoyo_get_path(path);
+ if (!buf)
+ goto out;
+ switch (operation) {
+ case TOMOYO_TYPE_MKDIR_ACL:
+ case TOMOYO_TYPE_RMDIR_ACL:
+ if (!buf->is_dir) {
+ /*
+ * tomoyo_get_path() reserves space for appending "/."
+ */
+ strcat((char *) buf->name, "/");
+ tomoyo_fill_path_info(buf);
+ }
+ }
+ error = tomoyo_check_single_path_permission2(domain, operation, buf,
+ mode);
+ out:
+ tomoyo_free(buf);
+ if (!is_enforce)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_check_rewrite_permission - Check permission for "rewrite".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @filp: Pointer to "struct file".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_check_rewrite_permission(struct tomoyo_domain_info *domain,
+ struct file *filp)
+{
+ int error = -ENOMEM;
+ const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+ const bool is_enforce = (mode == 3);
+ struct tomoyo_path_info *buf;
+
+ if (!mode || !filp->f_path.mnt)
+ return 0;
+ buf = tomoyo_get_path(&filp->f_path);
+ if (!buf)
+ goto out;
+ if (!tomoyo_is_no_rewrite_file(buf)) {
+ error = 0;
+ goto out;
+ }
+ error = tomoyo_check_single_path_permission2(domain,
+ TOMOYO_TYPE_REWRITE_ACL,
+ buf, mode);
+ out:
+ tomoyo_free(buf);
+ if (!is_enforce)
+ error = 0;
+ return error;
+}
+
+/**
+ * tomoyo_check_2path_perm - Check permission for "rename" and "link".
+ *
+ * @domain: Pointer to "struct tomoyo_domain_info".
+ * @operation: Type of operation.
+ * @path1: Pointer to "struct path".
+ * @path2: Pointer to "struct path".
+ *
+ * Returns 0 on success, negative value otherwise.
+ */
+int tomoyo_check_2path_perm(struct tomoyo_domain_info * const domain,
+ const u8 operation, struct path *path1,
+ struct path *path2)
+{
+ int error = -ENOMEM;
+ struct tomoyo_path_info *buf1, *buf2;
+ const u8 mode = tomoyo_check_flags(domain, TOMOYO_MAC_FOR_FILE);
+ const bool is_enforce = (mode == 3);
+ const char *msg;
+
+ if (!mode || !path1->mnt || !path2->mnt)
+ return 0;
+ buf1 = tomoyo_get_path(path1);
+ buf2 = tomoyo_get_path(path2);
+ if (!buf1 || !buf2)
+ goto out;
+ {
+ struct dentry *dentry = path1->dentry;
+ if (dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)) {
+ /*
+ * tomoyo_get_path() reserves space for appending "/."
+ */
+ if (!buf1->is_dir) {
+ strcat((char *) buf1->name, "/");
+ tomoyo_fill_path_info(buf1);
+ }
+ if (!buf2->is_dir) {
+ strcat((char *) buf2->name, "/");
+ tomoyo_fill_path_info(buf2);
+ }
+ }
+ }
+ error = tomoyo_check_double_path_acl(domain, operation, buf1, buf2);
+ msg = tomoyo_dp2keyword(operation);
+ if (!error)
+ goto out;
+ if (tomoyo_verbose_mode(domain))
+ printk(KERN_WARNING "TOMOYO-%s: Access '%s %s %s' "
+ "denied for %s\n", tomoyo_get_msg(is_enforce),
+ msg, buf1->name, buf2->name,
+ tomoyo_get_last_name(domain));
+ if (mode == 1 && tomoyo_domain_quota_is_ok(domain)) {
+ const char *name1 = tomoyo_get_file_pattern(buf1)->name;
+ const char *name2 = tomoyo_get_file_pattern(buf2)->name;
+ tomoyo_update_double_path_acl(operation, name1, name2, domain,
+ false);
+ }
+ out:
+ tomoyo_free(buf1);
+ tomoyo_free(buf2);
+ if (!is_enforce)
+ error = 0;
+ return error;
+}
diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
new file mode 100644
index 000000000000..d47f16b844b2
--- /dev/null
+++ b/security/tomoyo/realpath.c
@@ -0,0 +1,482 @@
+/*
+ * security/tomoyo/realpath.c
+ *
+ * Get the canonicalized absolute pathnames. The basis for TOMOYO.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/mount.h>
+#include <linux/mnt_namespace.h>
+#include "common.h"
+#include "realpath.h"
+
+/**
+ * tomoyo_encode: Convert binary string to ascii string.
+ *
+ * @buffer: Buffer for ASCII string.
+ * @buflen: Size of @buffer.
+ * @str: Binary string.
+ *
+ * Returns 0 on success, -ENOMEM otherwise.
+ */
+int tomoyo_encode(char *buffer, int buflen, const char *str)
+{
+ while (1) {
+ const unsigned char c = *(unsigned char *) str++;
+
+ if (tomoyo_is_valid(c)) {
+ if (--buflen <= 0)
+ break;
+ *buffer++ = (char) c;
+ if (c != '\\')
+ continue;
+ if (--buflen <= 0)
+ break;
+ *buffer++ = (char) c;
+ continue;
+ }
+ if (!c) {
+ if (--buflen <= 0)
+ break;
+ *buffer = '\0';
+ return 0;
+ }
+ buflen -= 4;
+ if (buflen <= 0)
+ break;
+ *buffer++ = '\\';
+ *buffer++ = (c >> 6) + '0';
+ *buffer++ = ((c >> 3) & 7) + '0';
+ *buffer++ = (c & 7) + '0';
+ }
+ return -ENOMEM;
+}
+
+/**
+ * tomoyo_realpath_from_path2 - Returns realpath(3) of the given dentry but ignores chroot'ed root.
+ *
+ * @path: Pointer to "struct path".
+ * @newname: Pointer to buffer to return value in.
+ * @newname_len: Size of @newname.
+ *
+ * Returns 0 on success, negative value otherwise.
+ *
+ * If dentry is a directory, trailing '/' is appended.
+ * Characters out of 0x20 < c < 0x7F range are converted to
+ * \ooo style octal string.
+ * Character \ is converted to \\ string.
+ */
+int tomoyo_realpath_from_path2(struct path *path, char *newname,
+ int newname_len)
+{
+ int error = -ENOMEM;
+ struct dentry *dentry = path->dentry;
+ char *sp;
+
+ if (!dentry || !path->mnt || !newname || newname_len <= 2048)
+ return -EINVAL;
+ if (dentry->d_op && dentry->d_op->d_dname) {
+ /* For "socket:[\$]" and "pipe:[\$]". */
+ static const int offset = 1536;
+ sp = dentry->d_op->d_dname(dentry, newname + offset,
+ newname_len - offset);
+ } else {
+ /* Taken from d_namespace_path(). */
+ struct path root;
+ struct path ns_root = { };
+ struct path tmp;
+
+ read_lock(&current->fs->lock);
+ root = current->fs->root;
+ path_get(&root);
+ read_unlock(&current->fs->lock);
+ spin_lock(&vfsmount_lock);
+ if (root.mnt && root.mnt->mnt_ns)
+ ns_root.mnt = mntget(root.mnt->mnt_ns->root);
+ if (ns_root.mnt)
+ ns_root.dentry = dget(ns_root.mnt->mnt_root);
+ spin_unlock(&vfsmount_lock);
+ spin_lock(&dcache_lock);
+ tmp = ns_root;
+ sp = __d_path(path, &tmp, newname, newname_len);
+ spin_unlock(&dcache_lock);
+ path_put(&root);
+ path_put(&ns_root);
+ }
+ if (IS_ERR(sp))
+ error = PTR_ERR(sp);
+ else
+ error = tomoyo_encode(newname, sp - newname, sp);
+ /* Append trailing '/' if dentry is a directory. */
+ if (!error && dentry->d_inode && S_ISDIR(dentry->d_inode->i_mode)
+ && *newname) {
+ sp = newname + strlen(newname);
+ if (*(sp - 1) != '/') {
+ if (sp < newname + newname_len - 4) {
+ *sp++ = '/';
+ *sp = '\0';
+ } else {
+ error = -ENOMEM;
+ }
+ }
+ }
+ if (error)
+ printk(KERN_WARNING "tomoyo_realpath: Pathname too long.\n");
+ return error;
+}
+
+/**
+ * tomoyo_realpath_from_path - Returns realpath(3) of the given pathname but ignores chroot'ed root.
+ *
+ * @path: Pointer to "struct path".
+ *
+ * Returns the realpath of the given @path on success, NULL otherwise.
+ *
+ * These functions use tomoyo_alloc(), so the caller must call tomoyo_free()
+ * if these functions didn't return NULL.
+ */
+char *tomoyo_realpath_from_path(struct path *path)
+{
+ char *buf = tomoyo_alloc(sizeof(struct tomoyo_page_buffer));
+
+ BUILD_BUG_ON(sizeof(struct tomoyo_page_buffer)
+ <= TOMOYO_MAX_PATHNAME_LEN - 1);
+ if (!buf)
+ return NULL;
+ if (tomoyo_realpath_from_path2(path, buf,
+ TOMOYO_MAX_PATHNAME_LEN - 1) == 0)
+ return buf;
+ tomoyo_free(buf);
+ return NULL;
+}
+
+/**
+ * tomoyo_realpath - Get realpath of a pathname.
+ *
+ * @pathname: The pathname to solve.
+ *
+ * Returns the realpath of @pathname on success, NULL otherwise.
+ */
+char *tomoyo_realpath(const char *pathname)
+{
+ struct nameidata nd;
+
+ if (pathname && path_lookup(pathname, LOOKUP_FOLLOW, &nd) == 0) {
+ char *buf = tomoyo_realpath_from_path(&nd.path);
+ path_put(&nd.path);
+ return buf;
+ }
+ return NULL;
+}
+
+/**
+ * tomoyo_realpath_nofollow - Get realpath of a pathname.
+ *
+ * @pathname: The pathname to solve.
+ *
+ * Returns the realpath of @pathname on success, NULL otherwise.
+ */
+char *tomoyo_realpath_nofollow(const char *pathname)
+{
+ struct nameidata nd;
+
+ if (pathname && path_lookup(pathname, 0, &nd) == 0) {
+ char *buf = tomoyo_realpath_from_path(&nd.path);
+ path_put(&nd.path);
+ return buf;
+ }
+ return NULL;
+}
+
+/* Memory allocated for non-string data. */
+static unsigned int tomoyo_allocated_memory_for_elements;
+/* Quota for holding non-string data. */
+static unsigned int tomoyo_quota_for_elements;
+
+/**
+ * tomoyo_alloc_element - Allocate permanent memory for structures.
+ *
+ * @size: Size in bytes.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ *
+ * Memory has to be zeroed.
+ * The RAM is chunked, so NEVER try to kfree() the returned pointer.
+ */
+void *tomoyo_alloc_element(const unsigned int size)
+{
+ static char *buf;
+ static DEFINE_MUTEX(lock);
+ static unsigned int buf_used_len = PATH_MAX;
+ char *ptr = NULL;
+ /*Assumes sizeof(void *) >= sizeof(long) is true. */
+ const unsigned int word_aligned_size
+ = roundup(size, max(sizeof(void *), sizeof(long)));
+ if (word_aligned_size > PATH_MAX)
+ return NULL;
+ /***** EXCLUSIVE SECTION START *****/
+ mutex_lock(&lock);
+ if (buf_used_len + word_aligned_size > PATH_MAX) {
+ if (!tomoyo_quota_for_elements ||
+ tomoyo_allocated_memory_for_elements
+ + PATH_MAX <= tomoyo_quota_for_elements)
+ ptr = kzalloc(PATH_MAX, GFP_KERNEL);
+ if (!ptr) {
+ printk(KERN_WARNING "ERROR: Out of memory "
+ "for tomoyo_alloc_element().\n");
+ if (!tomoyo_policy_loaded)
+ panic("MAC Initialization failed.\n");
+ } else {
+ buf = ptr;
+ tomoyo_allocated_memory_for_elements += PATH_MAX;
+ buf_used_len = word_aligned_size;
+ ptr = buf;
+ }
+ } else if (word_aligned_size) {
+ int i;
+ ptr = buf + buf_used_len;
+ buf_used_len += word_aligned_size;
+ for (i = 0; i < word_aligned_size; i++) {
+ if (!ptr[i])
+ continue;
+ printk(KERN_ERR "WARNING: Reserved memory was tainted! "
+ "The system might go wrong.\n");
+ ptr[i] = '\0';
+ }
+ }
+ mutex_unlock(&lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return ptr;
+}
+
+/* Memory allocated for string data in bytes. */
+static unsigned int tomoyo_allocated_memory_for_savename;
+/* Quota for holding string data in bytes. */
+static unsigned int tomoyo_quota_for_savename;
+
+/*
+ * TOMOYO uses this hash only when appending a string into the string
+ * table. Frequency of appending strings is very low. So we don't need
+ * large (e.g. 64k) hash size. 256 will be sufficient.
+ */
+#define TOMOYO_MAX_HASH 256
+
+/* Structure for string data. */
+struct tomoyo_name_entry {
+ struct list_head list;
+ struct tomoyo_path_info entry;
+};
+
+/* Structure for available memory region. */
+struct tomoyo_free_memory_block_list {
+ struct list_head list;
+ char *ptr; /* Pointer to a free area. */
+ int len; /* Length of the area. */
+};
+
+/*
+ * The list for "struct tomoyo_name_entry".
+ *
+ * This list is updated only inside tomoyo_save_name(), thus
+ * no global mutex exists.
+ */
+static struct list_head tomoyo_name_list[TOMOYO_MAX_HASH];
+
+/**
+ * tomoyo_save_name - Allocate permanent memory for string data.
+ *
+ * @name: The string to store into the permernent memory.
+ *
+ * Returns pointer to "struct tomoyo_path_info" on success, NULL otherwise.
+ *
+ * The RAM is shared, so NEVER try to modify or kfree() the returned name.
+ */
+const struct tomoyo_path_info *tomoyo_save_name(const char *name)
+{
+ static LIST_HEAD(fmb_list);
+ static DEFINE_MUTEX(lock);
+ struct tomoyo_name_entry *ptr;
+ unsigned int hash;
+ /* fmb contains available size in bytes.
+ fmb is removed from the fmb_list when fmb->len becomes 0. */
+ struct tomoyo_free_memory_block_list *fmb;
+ int len;
+ char *cp;
+
+ if (!name)
+ return NULL;
+ len = strlen(name) + 1;
+ if (len > TOMOYO_MAX_PATHNAME_LEN) {
+ printk(KERN_WARNING "ERROR: Name too long "
+ "for tomoyo_save_name().\n");
+ return NULL;
+ }
+ hash = full_name_hash((const unsigned char *) name, len - 1);
+ /***** EXCLUSIVE SECTION START *****/
+ mutex_lock(&lock);
+ list_for_each_entry(ptr, &tomoyo_name_list[hash % TOMOYO_MAX_HASH],
+ list) {
+ if (hash == ptr->entry.hash && !strcmp(name, ptr->entry.name))
+ goto out;
+ }
+ list_for_each_entry(fmb, &fmb_list, list) {
+ if (len <= fmb->len)
+ goto ready;
+ }
+ if (!tomoyo_quota_for_savename ||
+ tomoyo_allocated_memory_for_savename + PATH_MAX
+ <= tomoyo_quota_for_savename)
+ cp = kzalloc(PATH_MAX, GFP_KERNEL);
+ else
+ cp = NULL;
+ fmb = kzalloc(sizeof(*fmb), GFP_KERNEL);
+ if (!cp || !fmb) {
+ kfree(cp);
+ kfree(fmb);
+ printk(KERN_WARNING "ERROR: Out of memory "
+ "for tomoyo_save_name().\n");
+ if (!tomoyo_policy_loaded)
+ panic("MAC Initialization failed.\n");
+ ptr = NULL;
+ goto out;
+ }
+ tomoyo_allocated_memory_for_savename += PATH_MAX;
+ list_add(&fmb->list, &fmb_list);
+ fmb->ptr = cp;
+ fmb->len = PATH_MAX;
+ ready:
+ ptr = tomoyo_alloc_element(sizeof(*ptr));
+ if (!ptr)
+ goto out;
+ ptr->entry.name = fmb->ptr;
+ memmove(fmb->ptr, name, len);
+ tomoyo_fill_path_info(&ptr->entry);
+ fmb->ptr += len;
+ fmb->len -= len;
+ list_add_tail(&ptr->list, &tomoyo_name_list[hash % TOMOYO_MAX_HASH]);
+ if (fmb->len == 0) {
+ list_del(&fmb->list);
+ kfree(fmb);
+ }
+ out:
+ mutex_unlock(&lock);
+ /***** EXCLUSIVE SECTION END *****/
+ return ptr ? &ptr->entry : NULL;
+}
+
+/**
+ * tomoyo_realpath_init - Initialize realpath related code.
+ */
+void __init tomoyo_realpath_init(void)
+{
+ int i;
+
+ BUILD_BUG_ON(TOMOYO_MAX_PATHNAME_LEN > PATH_MAX);
+ for (i = 0; i < TOMOYO_MAX_HASH; i++)
+ INIT_LIST_HEAD(&tomoyo_name_list[i]);
+ INIT_LIST_HEAD(&tomoyo_kernel_domain.acl_info_list);
+ tomoyo_kernel_domain.domainname = tomoyo_save_name(TOMOYO_ROOT_NAME);
+ list_add_tail(&tomoyo_kernel_domain.list, &tomoyo_domain_list);
+ down_read(&tomoyo_domain_list_lock);
+ if (tomoyo_find_domain(TOMOYO_ROOT_NAME) != &tomoyo_kernel_domain)
+ panic("Can't register tomoyo_kernel_domain");
+ up_read(&tomoyo_domain_list_lock);
+}
+
+/* Memory allocated for temporary purpose. */
+static atomic_t tomoyo_dynamic_memory_size;
+
+/**
+ * tomoyo_alloc - Allocate memory for temporary purpose.
+ *
+ * @size: Size in bytes.
+ *
+ * Returns pointer to allocated memory on success, NULL otherwise.
+ */
+void *tomoyo_alloc(const size_t size)
+{
+ void *p = kzalloc(size, GFP_KERNEL);
+ if (p)
+ atomic_add(ksize(p), &tomoyo_dynamic_memory_size);
+ return p;
+}
+
+/**
+ * tomoyo_free - Release memory allocated by tomoyo_alloc().
+ *
+ * @p: Pointer returned by tomoyo_alloc(). May be NULL.
+ *
+ * Returns nothing.
+ */
+void tomoyo_free(const void *p)
+{
+ if (p) {
+ atomic_sub(ksize(p), &tomoyo_dynamic_memory_size);
+ kfree(p);
+ }
+}
+
+/**
+ * tomoyo_read_memory_counter - Check for memory usage in bytes.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns memory usage.
+ */
+int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head)
+{
+ if (!head->read_eof) {
+ const unsigned int shared
+ = tomoyo_allocated_memory_for_savename;
+ const unsigned int private
+ = tomoyo_allocated_memory_for_elements;
+ const unsigned int dynamic
+ = atomic_read(&tomoyo_dynamic_memory_size);
+ char buffer[64];
+
+ memset(buffer, 0, sizeof(buffer));
+ if (tomoyo_quota_for_savename)
+ snprintf(buffer, sizeof(buffer) - 1,
+ " (Quota: %10u)",
+ tomoyo_quota_for_savename);
+ else
+ buffer[0] = '\0';
+ tomoyo_io_printf(head, "Shared: %10u%s\n", shared, buffer);
+ if (tomoyo_quota_for_elements)
+ snprintf(buffer, sizeof(buffer) - 1,
+ " (Quota: %10u)",
+ tomoyo_quota_for_elements);
+ else
+ buffer[0] = '\0';
+ tomoyo_io_printf(head, "Private: %10u%s\n", private, buffer);
+ tomoyo_io_printf(head, "Dynamic: %10u\n", dynamic);
+ tomoyo_io_printf(head, "Total: %10u\n",
+ shared + private + dynamic);
+ head->read_eof = true;
+ }
+ return 0;
+}
+
+/**
+ * tomoyo_write_memory_quota - Set memory quota.
+ *
+ * @head: Pointer to "struct tomoyo_io_buffer".
+ *
+ * Returns 0.
+ */
+int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head)
+{
+ char *data = head->write_buf;
+ unsigned int size;
+
+ if (sscanf(data, "Shared: %u", &size) == 1)
+ tomoyo_quota_for_savename = size;
+ else if (sscanf(data, "Private: %u", &size) == 1)
+ tomoyo_quota_for_elements = size;
+ return 0;
+}
diff --git a/security/tomoyo/realpath.h b/security/tomoyo/realpath.h
new file mode 100644
index 000000000000..7ec9fc9cbc07
--- /dev/null
+++ b/security/tomoyo/realpath.h
@@ -0,0 +1,66 @@
+/*
+ * security/tomoyo/realpath.h
+ *
+ * Get the canonicalized absolute pathnames. The basis for TOMOYO.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#ifndef _SECURITY_TOMOYO_REALPATH_H
+#define _SECURITY_TOMOYO_REALPATH_H
+
+struct path;
+struct tomoyo_path_info;
+struct tomoyo_io_buffer;
+
+/* Convert binary string to ascii string. */
+int tomoyo_encode(char *buffer, int buflen, const char *str);
+
+/* Returns realpath(3) of the given pathname but ignores chroot'ed root. */
+int tomoyo_realpath_from_path2(struct path *path, char *newname,
+ int newname_len);
+
+/*
+ * Returns realpath(3) of the given pathname but ignores chroot'ed root.
+ * These functions use tomoyo_alloc(), so the caller must call tomoyo_free()
+ * if these functions didn't return NULL.
+ */
+char *tomoyo_realpath(const char *pathname);
+/*
+ * Same with tomoyo_realpath() except that it doesn't follow the final symlink.
+ */
+char *tomoyo_realpath_nofollow(const char *pathname);
+/* Same with tomoyo_realpath() except that the pathname is already solved. */
+char *tomoyo_realpath_from_path(struct path *path);
+
+/*
+ * Allocate memory for ACL entry.
+ * The RAM is chunked, so NEVER try to kfree() the returned pointer.
+ */
+void *tomoyo_alloc_element(const unsigned int size);
+
+/*
+ * Keep the given name on the RAM.
+ * The RAM is shared, so NEVER try to modify or kfree() the returned name.
+ */
+const struct tomoyo_path_info *tomoyo_save_name(const char *name);
+
+/* Allocate memory for temporary use (e.g. permission checks). */
+void *tomoyo_alloc(const size_t size);
+
+/* Free memory allocated by tomoyo_alloc(). */
+void tomoyo_free(const void *p);
+
+/* Check for memory usage. */
+int tomoyo_read_memory_counter(struct tomoyo_io_buffer *head);
+
+/* Set memory quota. */
+int tomoyo_write_memory_quota(struct tomoyo_io_buffer *head);
+
+/* Initialize realpath related code. */
+void __init tomoyo_realpath_init(void);
+
+#endif /* !defined(_SECURITY_TOMOYO_REALPATH_H) */
diff --git a/security/tomoyo/tomoyo.c b/security/tomoyo/tomoyo.c
new file mode 100644
index 000000000000..3eeeae12c4dc
--- /dev/null
+++ b/security/tomoyo/tomoyo.c
@@ -0,0 +1,294 @@
+/*
+ * security/tomoyo/tomoyo.c
+ *
+ * LSM hooks for TOMOYO Linux.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#include <linux/security.h>
+#include "common.h"
+#include "tomoyo.h"
+#include "realpath.h"
+
+static int tomoyo_cred_prepare(struct cred *new, const struct cred *old,
+ gfp_t gfp)
+{
+ /*
+ * Since "struct tomoyo_domain_info *" is a sharable pointer,
+ * we don't need to duplicate.
+ */
+ new->security = old->security;
+ return 0;
+}
+
+static int tomoyo_bprm_set_creds(struct linux_binprm *bprm)
+{
+ /*
+ * Do only if this function is called for the first time of an execve
+ * operation.
+ */
+ if (bprm->cred_prepared)
+ return 0;
+ /*
+ * Load policy if /sbin/tomoyo-init exists and /sbin/init is requested
+ * for the first time.
+ */
+ if (!tomoyo_policy_loaded)
+ tomoyo_load_policy(bprm->filename);
+ /*
+ * Tell tomoyo_bprm_check_security() is called for the first time of an
+ * execve operation.
+ */
+ bprm->cred->security = NULL;
+ return 0;
+}
+
+static int tomoyo_bprm_check_security(struct linux_binprm *bprm)
+{
+ struct tomoyo_domain_info *domain = bprm->cred->security;
+
+ /*
+ * Execute permission is checked against pathname passed to do_execve()
+ * using current domain.
+ */
+ if (!domain) {
+ struct tomoyo_domain_info *next_domain = NULL;
+ int retval = tomoyo_find_next_domain(bprm, &next_domain);
+
+ if (!retval)
+ bprm->cred->security = next_domain;
+ return retval;
+ }
+ /*
+ * Read permission is checked against interpreters using next domain.
+ * '1' is the result of open_to_namei_flags(O_RDONLY).
+ */
+ return tomoyo_check_open_permission(domain, &bprm->file->f_path, 1);
+}
+
+#ifdef CONFIG_SYSCTL
+
+static int tomoyo_prepend(char **buffer, int *buflen, const char *str)
+{
+ int namelen = strlen(str);
+
+ if (*buflen < namelen)
+ return -ENOMEM;
+ *buflen -= namelen;
+ *buffer -= namelen;
+ memcpy(*buffer, str, namelen);
+ return 0;
+}
+
+/**
+ * tomoyo_sysctl_path - return the realpath of a ctl_table.
+ * @table: pointer to "struct ctl_table".
+ *
+ * Returns realpath(3) of the @table on success.
+ * Returns NULL on failure.
+ *
+ * This function uses tomoyo_alloc(), so the caller must call tomoyo_free()
+ * if this function didn't return NULL.
+ */
+static char *tomoyo_sysctl_path(struct ctl_table *table)
+{
+ int buflen = TOMOYO_MAX_PATHNAME_LEN;
+ char *buf = tomoyo_alloc(buflen);
+ char *end = buf + buflen;
+ int error = -ENOMEM;
+
+ if (!buf)
+ return NULL;
+
+ *--end = '\0';
+ buflen--;
+ while (table) {
+ char num[32];
+ const char *sp = table->procname;
+
+ if (!sp) {
+ memset(num, 0, sizeof(num));
+ snprintf(num, sizeof(num) - 1, "=%d=", table->ctl_name);
+ sp = num;
+ }
+ if (tomoyo_prepend(&end, &buflen, sp) ||
+ tomoyo_prepend(&end, &buflen, "/"))
+ goto out;
+ table = table->parent;
+ }
+ if (tomoyo_prepend(&end, &buflen, "/proc/sys"))
+ goto out;
+ error = tomoyo_encode(buf, end - buf, end);
+ out:
+ if (!error)
+ return buf;
+ tomoyo_free(buf);
+ return NULL;
+}
+
+static int tomoyo_sysctl(struct ctl_table *table, int op)
+{
+ int error;
+ char *name;
+
+ op &= MAY_READ | MAY_WRITE;
+ if (!op)
+ return 0;
+ name = tomoyo_sysctl_path(table);
+ if (!name)
+ return -ENOMEM;
+ error = tomoyo_check_file_perm(tomoyo_domain(), name, op);
+ tomoyo_free(name);
+ return error;
+}
+#endif
+
+static int tomoyo_path_truncate(struct path *path, loff_t length,
+ unsigned int time_attrs)
+{
+ return tomoyo_check_1path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_TRUNCATE_ACL,
+ path);
+}
+
+static int tomoyo_path_unlink(struct path *parent, struct dentry *dentry)
+{
+ struct path path = { parent->mnt, dentry };
+ return tomoyo_check_1path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_UNLINK_ACL,
+ &path);
+}
+
+static int tomoyo_path_mkdir(struct path *parent, struct dentry *dentry,
+ int mode)
+{
+ struct path path = { parent->mnt, dentry };
+ return tomoyo_check_1path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_MKDIR_ACL,
+ &path);
+}
+
+static int tomoyo_path_rmdir(struct path *parent, struct dentry *dentry)
+{
+ struct path path = { parent->mnt, dentry };
+ return tomoyo_check_1path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_RMDIR_ACL,
+ &path);
+}
+
+static int tomoyo_path_symlink(struct path *parent, struct dentry *dentry,
+ const char *old_name)
+{
+ struct path path = { parent->mnt, dentry };
+ return tomoyo_check_1path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_SYMLINK_ACL,
+ &path);
+}
+
+static int tomoyo_path_mknod(struct path *parent, struct dentry *dentry,
+ int mode, unsigned int dev)
+{
+ struct path path = { parent->mnt, dentry };
+ int type = TOMOYO_TYPE_CREATE_ACL;
+
+ switch (mode & S_IFMT) {
+ case S_IFCHR:
+ type = TOMOYO_TYPE_MKCHAR_ACL;
+ break;
+ case S_IFBLK:
+ type = TOMOYO_TYPE_MKBLOCK_ACL;
+ break;
+ case S_IFIFO:
+ type = TOMOYO_TYPE_MKFIFO_ACL;
+ break;
+ case S_IFSOCK:
+ type = TOMOYO_TYPE_MKSOCK_ACL;
+ break;
+ }
+ return tomoyo_check_1path_perm(tomoyo_domain(),
+ type, &path);
+}
+
+static int tomoyo_path_link(struct dentry *old_dentry, struct path *new_dir,
+ struct dentry *new_dentry)
+{
+ struct path path1 = { new_dir->mnt, old_dentry };
+ struct path path2 = { new_dir->mnt, new_dentry };
+ return tomoyo_check_2path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_LINK_ACL,
+ &path1, &path2);
+}
+
+static int tomoyo_path_rename(struct path *old_parent,
+ struct dentry *old_dentry,
+ struct path *new_parent,
+ struct dentry *new_dentry)
+{
+ struct path path1 = { old_parent->mnt, old_dentry };
+ struct path path2 = { new_parent->mnt, new_dentry };
+ return tomoyo_check_2path_perm(tomoyo_domain(),
+ TOMOYO_TYPE_RENAME_ACL,
+ &path1, &path2);
+}
+
+static int tomoyo_file_fcntl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ if (cmd == F_SETFL && ((arg ^ file->f_flags) & O_APPEND))
+ return tomoyo_check_rewrite_permission(tomoyo_domain(), file);
+ return 0;
+}
+
+static int tomoyo_dentry_open(struct file *f, const struct cred *cred)
+{
+ int flags = f->f_flags;
+
+ if ((flags + 1) & O_ACCMODE)
+ flags++;
+ flags |= f->f_flags & (O_APPEND | O_TRUNC);
+ /* Don't check read permission here if called from do_execve(). */
+ if (current->in_execve)
+ return 0;
+ return tomoyo_check_open_permission(tomoyo_domain(), &f->f_path, flags);
+}
+
+static struct security_operations tomoyo_security_ops = {
+ .name = "tomoyo",
+ .cred_prepare = tomoyo_cred_prepare,
+ .bprm_set_creds = tomoyo_bprm_set_creds,
+ .bprm_check_security = tomoyo_bprm_check_security,
+#ifdef CONFIG_SYSCTL
+ .sysctl = tomoyo_sysctl,
+#endif
+ .file_fcntl = tomoyo_file_fcntl,
+ .dentry_open = tomoyo_dentry_open,
+ .path_truncate = tomoyo_path_truncate,
+ .path_unlink = tomoyo_path_unlink,
+ .path_mkdir = tomoyo_path_mkdir,
+ .path_rmdir = tomoyo_path_rmdir,
+ .path_symlink = tomoyo_path_symlink,
+ .path_mknod = tomoyo_path_mknod,
+ .path_link = tomoyo_path_link,
+ .path_rename = tomoyo_path_rename,
+};
+
+static int __init tomoyo_init(void)
+{
+ struct cred *cred = (struct cred *) current_cred();
+
+ if (!security_module_enable(&tomoyo_security_ops))
+ return 0;
+ /* register ourselves with the security framework */
+ if (register_security(&tomoyo_security_ops))
+ panic("Failure registering TOMOYO Linux");
+ printk(KERN_INFO "TOMOYO Linux initialized\n");
+ cred->security = &tomoyo_kernel_domain;
+ tomoyo_realpath_init();
+ return 0;
+}
+
+security_initcall(tomoyo_init);
diff --git a/security/tomoyo/tomoyo.h b/security/tomoyo/tomoyo.h
new file mode 100644
index 000000000000..a0c8f6e0bea4
--- /dev/null
+++ b/security/tomoyo/tomoyo.h
@@ -0,0 +1,106 @@
+/*
+ * security/tomoyo/tomoyo.h
+ *
+ * Implementation of the Domain-Based Mandatory Access Control.
+ *
+ * Copyright (C) 2005-2009 NTT DATA CORPORATION
+ *
+ * Version: 2.2.0-pre 2009/02/01
+ *
+ */
+
+#ifndef _SECURITY_TOMOYO_TOMOYO_H
+#define _SECURITY_TOMOYO_TOMOYO_H
+
+struct tomoyo_path_info;
+struct path;
+struct inode;
+struct linux_binprm;
+struct pt_regs;
+struct tomoyo_page_buffer;
+
+int tomoyo_check_file_perm(struct tomoyo_domain_info *domain,
+ const char *filename, const u8 perm);
+int tomoyo_check_exec_perm(struct tomoyo_domain_info *domain,
+ const struct tomoyo_path_info *filename,
+ struct tomoyo_page_buffer *buf);
+int tomoyo_check_open_permission(struct tomoyo_domain_info *domain,
+ struct path *path, const int flag);
+int tomoyo_check_1path_perm(struct tomoyo_domain_info *domain,
+ const u8 operation, struct path *path);
+int tomoyo_check_2path_perm(struct tomoyo_domain_info *domain,
+ const u8 operation, struct path *path1,
+ struct path *path2);
+int tomoyo_check_rewrite_permission(struct tomoyo_domain_info *domain,
+ struct file *filp);
+int tomoyo_find_next_domain(struct linux_binprm *bprm,
+ struct tomoyo_domain_info **next_domain);
+
+/* Index numbers for Access Controls. */
+
+#define TOMOYO_TYPE_SINGLE_PATH_ACL 0
+#define TOMOYO_TYPE_DOUBLE_PATH_ACL 1
+
+/* Index numbers for File Controls. */
+
+/*
+ * TYPE_READ_WRITE_ACL is special. TYPE_READ_WRITE_ACL is automatically set
+ * if both TYPE_READ_ACL and TYPE_WRITE_ACL are set. Both TYPE_READ_ACL and
+ * TYPE_WRITE_ACL are automatically set if TYPE_READ_WRITE_ACL is set.
+ * TYPE_READ_WRITE_ACL is automatically cleared if either TYPE_READ_ACL or
+ * TYPE_WRITE_ACL is cleared. Both TYPE_READ_ACL and TYPE_WRITE_ACL are
+ * automatically cleared if TYPE_READ_WRITE_ACL is cleared.
+ */
+
+#define TOMOYO_TYPE_READ_WRITE_ACL 0
+#define TOMOYO_TYPE_EXECUTE_ACL 1
+#define TOMOYO_TYPE_READ_ACL 2
+#define TOMOYO_TYPE_WRITE_ACL 3
+#define TOMOYO_TYPE_CREATE_ACL 4
+#define TOMOYO_TYPE_UNLINK_ACL 5
+#define TOMOYO_TYPE_MKDIR_ACL 6
+#define TOMOYO_TYPE_RMDIR_ACL 7
+#define TOMOYO_TYPE_MKFIFO_ACL 8
+#define TOMOYO_TYPE_MKSOCK_ACL 9
+#define TOMOYO_TYPE_MKBLOCK_ACL 10
+#define TOMOYO_TYPE_MKCHAR_ACL 11
+#define TOMOYO_TYPE_TRUNCATE_ACL 12
+#define TOMOYO_TYPE_SYMLINK_ACL 13
+#define TOMOYO_TYPE_REWRITE_ACL 14
+#define TOMOYO_MAX_SINGLE_PATH_OPERATION 15
+
+#define TOMOYO_TYPE_LINK_ACL 0
+#define TOMOYO_TYPE_RENAME_ACL 1
+#define TOMOYO_MAX_DOUBLE_PATH_OPERATION 2
+
+#define TOMOYO_DOMAINPOLICY 0
+#define TOMOYO_EXCEPTIONPOLICY 1
+#define TOMOYO_DOMAIN_STATUS 2
+#define TOMOYO_PROCESS_STATUS 3
+#define TOMOYO_MEMINFO 4
+#define TOMOYO_SELFDOMAIN 5
+#define TOMOYO_VERSION 6
+#define TOMOYO_PROFILE 7
+#define TOMOYO_MANAGER 8
+
+extern struct tomoyo_domain_info tomoyo_kernel_domain;
+
+static inline struct tomoyo_domain_info *tomoyo_domain(void)
+{
+ return current_cred()->security;
+}
+
+/* Caller holds tasklist_lock spinlock. */
+static inline struct tomoyo_domain_info *tomoyo_real_domain(struct task_struct
+ *task)
+{
+ /***** CRITICAL SECTION START *****/
+ const struct cred *cred = get_task_cred(task);
+ struct tomoyo_domain_info *domain = cred->security;
+
+ put_cred(cred);
+ return domain;
+ /***** CRITICAL SECTION END *****/
+}
+
+#endif /* !defined(_SECURITY_TOMOYO_TOMOYO_H) */