tomoyo: Use atomic_t for statistics counter

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commit a8772fad01 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Tetsuo Handa 2020-01-02 12:53:49 +09:00 • committed by Greg Kroah-Hartman

parent a5491f38c7

commit 9db441e545

1 changed files with 4 additions and 7 deletions

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security/tomoyo/common.c

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