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tomoyo: Use atomic_t for statistics counter
authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Thu, 2 Jan 2020 03:53:49 +0000 (12:53 +0900)
committerTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Thu, 2 Jan 2020 03:53:49 +0000 (12:53 +0900)
commita8772fad0172aeae339144598b809fd8d4823331
tree1bc91f733adde425b5f16b723c7df57a5170dc50tree | snapshot
parent738d2902773e30939a982c8df7a7f94293659810commit | diff
tomoyo: Use atomic_t for statistics counter

syzbot is reporting that there is a race at tomoyo_stat_update() [1].
Although it is acceptable to fail to track exact number of times policy
was updated, convert to atomic_t because this is not a hot path.

[1] https://syzkaller.appspot.com/bug?id=a4d7b973972eeed410596e6604580e0133b0fc04

Reported-by: syzbot <syzbot+efea72d4a0a1d03596cd@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
security/tomoyo/common.c diff | blob | blame | history
Mirror https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git