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Diffstat (limited to 'security')
-rw-r--r--security/apparmor/path.c65
-rw-r--r--security/integrity/evm/evm_crypto.c19
-rw-r--r--security/selinux/netport.c4
-rw-r--r--security/tomoyo/realpath.c13
4 files changed, 66 insertions, 35 deletions
diff --git a/security/apparmor/path.c b/security/apparmor/path.c
index 36cc0cc39e78..b566eba4a65c 100644
--- a/security/apparmor/path.c
+++ b/security/apparmor/path.c
@@ -57,23 +57,44 @@ static int prepend(char **buffer, int buflen, const char *str, int namelen)
static int d_namespace_path(struct path *path, char *buf, int buflen,
char **name, int flags)
{
- struct path root, tmp;
char *res;
- int connected, error = 0;
+ int error = 0;
+ int connected = 1;
+
+ if (path->mnt->mnt_flags & MNT_INTERNAL) {
+ /* it's not mounted anywhere */
+ res = dentry_path(path->dentry, buf, buflen);
+ *name = res;
+ if (IS_ERR(res)) {
+ *name = buf;
+ return PTR_ERR(res);
+ }
+ if (path->dentry->d_sb->s_magic == PROC_SUPER_MAGIC &&
+ strncmp(*name, "/sys/", 5) == 0) {
+ /* TODO: convert over to using a per namespace
+ * control instead of hard coded /proc
+ */
+ return prepend(name, *name - buf, "/proc", 5);
+ }
+ return 0;
+ }
- /* Get the root we want to resolve too, released below */
+ /* resolve paths relative to chroot?*/
if (flags & PATH_CHROOT_REL) {
- /* resolve paths relative to chroot */
+ struct path root;
get_fs_root(current->fs, &root);
- } else {
- /* resolve paths relative to namespace */
- root.mnt = current->nsproxy->mnt_ns->root;
- root.dentry = root.mnt->mnt_root;
- path_get(&root);
+ res = __d_path(path, &root, buf, buflen);
+ if (res && !IS_ERR(res)) {
+ /* everything's fine */
+ *name = res;
+ path_put(&root);
+ goto ok;
+ }
+ path_put(&root);
+ connected = 0;
}
- tmp = root;
- res = __d_path(path, &tmp, buf, buflen);
+ res = d_absolute_path(path, buf, buflen);
*name = res;
/* handle error conditions - and still allow a partial path to
@@ -84,7 +105,10 @@ static int d_namespace_path(struct path *path, char *buf, int buflen,
*name = buf;
goto out;
}
+ if (!our_mnt(path->mnt))
+ connected = 0;
+ok:
/* Handle two cases:
* 1. A deleted dentry && profile is not allowing mediation of deleted
* 2. On some filesystems, newly allocated dentries appear to the
@@ -97,10 +121,7 @@ static int d_namespace_path(struct path *path, char *buf, int buflen,
goto out;
}
- /* Determine if the path is connected to the expected root */
- connected = tmp.dentry == root.dentry && tmp.mnt == root.mnt;
-
- /* If the path is not connected,
+ /* If the path is not connected to the expected root,
* check if it is a sysctl and handle specially else remove any
* leading / that __d_path may have returned.
* Unless
@@ -112,17 +133,9 @@ static int d_namespace_path(struct path *path, char *buf, int buflen,
* namespace root.
*/
if (!connected) {
- /* is the disconnect path a sysctl? */
- if (tmp.dentry->d_sb->s_magic == PROC_SUPER_MAGIC &&
- strncmp(*name, "/sys/", 5) == 0) {
- /* TODO: convert over to using a per namespace
- * control instead of hard coded /proc
- */
- error = prepend(name, *name - buf, "/proc", 5);
- } else if (!(flags & PATH_CONNECT_PATH) &&
+ if (!(flags & PATH_CONNECT_PATH) &&
!(((flags & CHROOT_NSCONNECT) == CHROOT_NSCONNECT) &&
- (tmp.mnt == current->nsproxy->mnt_ns->root &&
- tmp.dentry == tmp.mnt->mnt_root))) {
+ our_mnt(path->mnt))) {
/* disconnected path, don't return pathname starting
* with '/'
*/
@@ -133,8 +146,6 @@ static int d_namespace_path(struct path *path, char *buf, int buflen,
}
out:
- path_put(&root);
-
return error;
}
diff --git a/security/integrity/evm/evm_crypto.c b/security/integrity/evm/evm_crypto.c
index 5dd5b140242c..8738deff26fa 100644
--- a/security/integrity/evm/evm_crypto.c
+++ b/security/integrity/evm/evm_crypto.c
@@ -27,20 +27,35 @@ static int evmkey_len = MAX_KEY_SIZE;
struct crypto_shash *hmac_tfm;
+static DEFINE_MUTEX(mutex);
+
static struct shash_desc *init_desc(void)
{
int rc;
struct shash_desc *desc;
if (hmac_tfm == NULL) {
+ mutex_lock(&mutex);
+ if (hmac_tfm)
+ goto out;
hmac_tfm = crypto_alloc_shash(evm_hmac, 0, CRYPTO_ALG_ASYNC);
if (IS_ERR(hmac_tfm)) {
pr_err("Can not allocate %s (reason: %ld)\n",
evm_hmac, PTR_ERR(hmac_tfm));
rc = PTR_ERR(hmac_tfm);
hmac_tfm = NULL;
+ mutex_unlock(&mutex);
+ return ERR_PTR(rc);
+ }
+ rc = crypto_shash_setkey(hmac_tfm, evmkey, evmkey_len);
+ if (rc) {
+ crypto_free_shash(hmac_tfm);
+ hmac_tfm = NULL;
+ mutex_unlock(&mutex);
return ERR_PTR(rc);
}
+out:
+ mutex_unlock(&mutex);
}
desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(hmac_tfm),
@@ -51,11 +66,7 @@ static struct shash_desc *init_desc(void)
desc->tfm = hmac_tfm;
desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
- rc = crypto_shash_setkey(hmac_tfm, evmkey, evmkey_len);
- if (rc)
- goto out;
rc = crypto_shash_init(desc);
-out:
if (rc) {
kfree(desc);
return ERR_PTR(rc);
diff --git a/security/selinux/netport.c b/security/selinux/netport.c
index 0b62bd112461..7b9eb1faf68b 100644
--- a/security/selinux/netport.c
+++ b/security/selinux/netport.c
@@ -123,7 +123,9 @@ static void sel_netport_insert(struct sel_netport *port)
if (sel_netport_hash[idx].size == SEL_NETPORT_HASH_BKT_LIMIT) {
struct sel_netport *tail;
tail = list_entry(
- rcu_dereference(sel_netport_hash[idx].list.prev),
+ rcu_dereference_protected(
+ sel_netport_hash[idx].list.prev,
+ lockdep_is_held(&sel_netport_lock)),
struct sel_netport, list);
list_del_rcu(&tail->list);
kfree_rcu(tail, rcu);
diff --git a/security/tomoyo/realpath.c b/security/tomoyo/realpath.c
index 738bbdf8d4c7..d9f3ced8756e 100644
--- a/security/tomoyo/realpath.c
+++ b/security/tomoyo/realpath.c
@@ -101,9 +101,8 @@ static char *tomoyo_get_absolute_path(struct path *path, char * const buffer,
{
char *pos = ERR_PTR(-ENOMEM);
if (buflen >= 256) {
- struct path ns_root = { };
/* go to whatever namespace root we are under */
- pos = __d_path(path, &ns_root, buffer, buflen - 1);
+ pos = d_absolute_path(path, buffer, buflen - 1);
if (!IS_ERR(pos) && *pos == '/' && pos[1]) {
struct inode *inode = path->dentry->d_inode;
if (inode && S_ISDIR(inode->i_mode)) {
@@ -294,8 +293,16 @@ char *tomoyo_realpath_from_path(struct path *path)
pos = tomoyo_get_local_path(path->dentry, buf,
buf_len - 1);
/* Get absolute name for the rest. */
- else
+ else {
pos = tomoyo_get_absolute_path(path, buf, buf_len - 1);
+ /*
+ * Fall back to local name if absolute name is not
+ * available.
+ */
+ if (pos == ERR_PTR(-EINVAL))
+ pos = tomoyo_get_local_path(path->dentry, buf,
+ buf_len - 1);
+ }
encode:
if (IS_ERR(pos))
continue;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-15 06:19:40 +0000