linux-kernel - Re: [syzbot] INFO: rcu detected stall in ieee80211_tasklet

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Message-ID: <CACT4Y+ZDvKgc7Z-qKVie2mvoEw9FpA8hEZ3NyRaLDf-KnK+J7A@mail.gmail.com>
Date:   Thu, 28 Oct 2021 15:01:34 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+7bb955045fc0840decd3@...kaller.appspotmail.com>
Cc:     davem@...emloft.net, fweisbec@...il.com, hdanton@...a.com,
        johannes.berg@...el.com, johannes@...solutions.net,
        kuba@...nel.org, kvalo@...eaurora.org,
        linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
        mingo@...nel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: Re: [syzbot] INFO: rcu detected stall in ieee80211_tasklet_handler

On Tue, 26 Oct 2021 at 23:44, syzbot
<syzbot+7bb955045fc0840decd3@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 313bbd1990b6ddfdaa7da098d0c56b098a833572
> Author: Johannes Berg <johannes.berg@...el.com>
> Date:   Wed Sep 15 09:29:37 2021 +0000
>
>     mac80211-hwsim: fix late beacon hrtimer handling
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=151766bab00000
> start commit:   835d31d319d9 Merge tag 'media/v5.15-1' of git://git.kernel..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=9c32e23fada3a0e4
> dashboard link: https://syzkaller.appspot.com/bug?extid=7bb955045fc0840decd3
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15e08125300000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14b17dde300000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: mac80211-hwsim: fix late beacon hrtimer handling
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks plausible:

#syz fix: mac80211-hwsim: fix late beacon hrtimer handling