* Re: [PATCH] mac80211_hwsim: close the race between running and enqueuing hrtimer
[not found] <20200929085749.12396-1-hdanton@sina.com>
@ 2020-09-29 19:28 ` Thomas Gleixner
0 siblings, 0 replies; only message in thread
From: Thomas Gleixner @ 2020-09-29 19:28 UTC (permalink / raw)
To: Hillf Danton, Johannes Berg
Cc: syzbot, davem, hchunhui, ja, jmorris, kuznet, linux-kernel,
netdev, syzkaller-bugs, yoshfuji, Hillf Danton
On Tue, Sep 29 2020 at 16:57, Hillf Danton wrote:
> So the timer was armed at some point and then the expiry which does the
> forward races with the ioctl which starts the timer. Lack of
> serialization or such ...
> ===
>
> To close the race, replace hrtimer_is_queued() with hrtimer_active() on
> enqueuing timer, because it also covers the case of a running timer in
> addition to the queued one.
>
> Link: https://lore.kernel.org/lkml/87pn65khft.fsf@nanos.tec.linutronix.de/
> Reported-by: syzbot+ca740b95a16399ceb9a5@syzkaller.appspotmail.com
> Decoded-by: Thomas Gleixner <tglx@linutronix.de>
> Signed-off-by: Hillf Danton <hdanton@sina.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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[not found] <20200929085749.12396-1-hdanton@sina.com>
2020-09-29 19:28 ` [PATCH] mac80211_hwsim: close the race between running and enqueuing hrtimer Thomas Gleixner
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