linux-toradex.git/security/tomoyo/util.c, branch v4.5

tomoyo: reduce mmap_sem hold for mm->exe_file

2015-04-17T13:04:11+00:00

The mm->exe_file is currently serialized with mmap_sem (shared) in order
to both safely (1) read the file and (2) compute the realpath by calling
tomoyo_realpath_from_path, making it an absolute overkill.  Good users
will, on the other hand, make use of the more standard get_mm_exe_file(),
requiring only holding the mmap_sem to read the value, and relying on
reference

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Davidlohr Bueso 
Acked-by: Tetsuo Handa 
Cc: James Morris 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: use mm->exe_file instead of first VM_EXECUTABLE vma->vm_file

2012-10-09T07:22:18+00:00

Some security modules and oprofile still uses VM_EXECUTABLE for retrieving
a task's executable file.  After this patch they will use mm->exe_file
directly.  mm->exe_file is protected with mm->mmap_sem, so locking stays
the same.

Signed-off-by: Konstantin Khlebnikov 
Acked-by: Chris Metcalf 			[arch/tile]
Acked-by: Tetsuo Handa 	[tomoyo]
Cc: Alexander Viro 
Cc: Carsten Otte 
Cc: Cyrill Gorcunov 
Cc: Eric Paris 
Cc: H. Peter Anvin 
Cc: Hugh Dickins 
Cc: Ingo Molnar 
Acked-by: James Morris 
Cc: Jason Baron 
Cc: Kentaro Takeda 
Cc: Matt Helsley 
Cc: Nick Piggin 
Cc: Oleg Nesterov 
Cc: Peter Zijlstra 
Cc: Robert Richter 
Cc: Suresh Siddha 
Cc: Venkatesh Pallipadi 
Acked-by: Linus Torvalds 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

TOMOYO: Accept \000 as a valid character.

2012-01-17T23:40:59+00:00

TOMOYO 2.5 in Linux 3.2 and later handles Unix domain socket's address.
Thus, tomoyo_correct_word2() needs to accept \000 as a valid character, or
TOMOYO 2.5 cannot handle Unix domain's abstract socket address.

Reported-by: Steven Allen 
Signed-off-by: Tetsuo Handa 
CC: stable@vger.kernel.org [3.2+]
Signed-off-by: James Morris

TOMOYO: Fix quota and garbage collector.

2011-10-12T01:15:20+00:00

Commit 059d84db "TOMOYO: Add socket operation restriction support" and
commit 731d37aa "TOMOYO: Allow domain transition without execve()." forgot to
update tomoyo_domain_quota_is_ok() and tomoyo_del_acl() which results in
incorrect quota counting and memory leak.

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris

TOMOYO: Allow domain transition without execve().

2011-09-13T22:27:06+00:00

To be able to split permissions for Apache's CGI programs which are executed
without execve(), add special domain transition which is performed by writing
a TOMOYO's domainname to /sys/kernel/security/tomoyo/self_domain interface.

This is an API for TOMOYO-aware userland applications. However, since I expect
TOMOYO and other LSM modules to run in parallel, this patch does not use
/proc/self/attr/ interface in order to avoid conflicts with other LSM modules
when it became possible to run multiple LSM modules in parallel.

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris

TOMOYO: Add socket operation restriction support.

2011-09-13T22:27:05+00:00

This patch adds support for permission checks for PF_INET/PF_INET6/PF_UNIX
socket's bind()/listen()/connect()/send() operations.

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris

TOMOYO: Add environment variable name restriction support.

2011-09-13T22:27:05+00:00

This patch adds support for checking environment variable's names.
Although TOMOYO already provides ability to check argv[]/envp[] passed to
execve() requests,

  file execute /bin/sh exec.envp["LD_LIBRARY_PATH"]="bar"

will reject execution of /bin/sh if environment variable LD_LIBRARY_PATH is not
defined. To grant execution of /bin/sh if LD_LIBRARY_PATH is not defined,
administrators have to specify like

  file execute /bin/sh exec.envp["LD_LIBRARY_PATH"]="/system/lib"
  file execute /bin/sh exec.envp["LD_LIBRARY_PATH"]=NULL

. Since there are many environment variables whereas conditional checks are
applied as "&&", it is difficult to cover all combinations. Therefore, this
patch supports conditional checks that are applied as "||", by specifying like

  file execute /bin/sh
  misc env LD_LIBRARY_PATH exec.envp["LD_LIBRARY_PATH"]="/system/lib"

which means "grant execution of /bin/sh if environment variable is not defined
or is defined and its value is /system/lib".

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris

TOMOYO: Fix incorrect enforce mode.

2011-09-09T23:08:48+00:00

In tomoyo_get_mode() since 2.6.36, CONFIG::file::execute was by error used in
place of CONFIG::file if CONFIG::file::execute was set to other than default.
As a result, enforcing mode was not applied in a way documentation says.

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris

TOMOYO: Update kernel-doc.

2011-07-14T07:50:03+00:00

Update comments for scripts/kernel-doc and fix some of errors reported by
scripts/checkpatch.pl .

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris

TOMOYO: Allow using UID/GID etc. of current thread as conditions.

2011-07-11T01:05:32+00:00

This patch adds support for permission checks using current thread's UID/GID
etc. in addition to pathnames.

Signed-off-by: Tetsuo Handa 
Signed-off-by: James Morris