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| author | Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> | 2011-04-03 00:09:26 +0900 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2011-04-19 09:37:06 +1000 |
| commit | 2a086e5d3a23570735f75b784d29b93068070833 (patch) | |
| tree | 43949632ba2e1c8ed4a8169d64c406d66ce36f23 /security/tomoyo/file.c | |
| parent | a3232d2fa2e3cbab3e76d91cdae5890fee8a4034 (diff) | |
| download | linux-0-day-2a086e5d3a23570735f75b784d29b93068070833.tar.gz linux-0-day-2a086e5d3a23570735f75b784d29b93068070833.tar.xz | |
TOMOYO: Fix race on updating profile's comment line.
In tomoyo_write_profile() since 2.6.34, a lock was by error missing when
replacing profile's comment line. If multiple threads attempted
echo '0-COMMENT=comment' > /sys/kernel/security/tomoyo/profile
in parallel, garbage collector will fail to kfree() the old value.
Protect the replacement using a lock. Also, keep the old value rather than
replace with empty string when out of memory error has occurred.
Signed-off-by: Xiaochen Wang <wangxiaochen0@gmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'security/tomoyo/file.c')
0 files changed, 0 insertions, 0 deletions