linux-kernel - Re: INFO: rcu detected stall in sys

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Message-ID: <CACT4Y+Z0=kRUdwOguF5a_E+HyUUsnD3Gw=qx9Z_dao1o41W=ag@mail.gmail.com>
Date:   Thu, 17 Dec 2020 09:18:45 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+7ee926c5e237e614ccb1@...kaller.appspotmail.com>
Cc:     Borislav Petkov <bp@...en8.de>, David Miller <davem@...emloft.net>,
        David Howells <dhowells@...hat.com>,
        Frédéric Weisbecker <fweisbec@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "H. Peter Anvin" <hpa@...or.com>, linux-afs@...ts.infradead.org,
        "open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
        <linux-crypto@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>, Ingo Molnar <mingo@...hat.com>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        "the arch/x86 maintainers" <x86@...nel.org>
Subject: Re: INFO: rcu detected stall in sys_open (2)

On Wed, Dec 16, 2020 at 2:40 PM syzbot
<syzbot+7ee926c5e237e614ccb1@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 1d0e850a49a5b56f8f3cb51e74a11e2fedb96be6
> Author: David Howells <dhowells@...hat.com>
> Date:   Fri Oct 16 12:21:14 2020 +0000
>
>     afs: Fix cell removal
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=128ceadf500000
> start commit:   c85fb28b Merge tag 'arm64-fixes' of git://git.kernel.org/p..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=de7f697da23057c7
> dashboard link: https://syzkaller.appspot.com/bug?extid=7ee926c5e237e614ccb1
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1227c177900000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13553f60500000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: afs: Fix cell removal
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

#syz fix: afs: Fix cell removal