linux-kernel - Re: WARNING in io_uring_cancel_task

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Message-ID: <000000000000512a7f05ba000ead@google.com>
Date:   Thu, 28 Jan 2021 17:38:06 -0800
From:   syzbot <syzbot+3e3d9bd0c6ce9efbc3ef@...kaller.appspotmail.com>
To:     asml.silence@...il.com, axboe@...nel.dk, io-uring@...r.kernel.org,
        linux-kernel@...r.kernel.org, mingo@...nel.org, mingo@...hat.com,
        peterz@...radead.org, rostedt@...dmis.org, stable@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, will@...nel.org
Subject: Re: WARNING in io_uring_cancel_task_requests

syzbot has bisected this issue to:

commit 4d004099a668c41522242aa146a38cc4eb59cb1e
Author: Peter Zijlstra <peterz@...radead.org>
Date:   Fri Oct 2 09:04:21 2020 +0000

    lockdep: Fix lockdep recursion

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=133f3090d00000
start commit:   d03154e8 Add linux-next specific files for 20210128
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=10bf3090d00000
console output: https://syzkaller.appspot.com/x/log.txt?x=173f3090d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6953ffb584722a1
dashboard link: https://syzkaller.appspot.com/bug?extid=3e3d9bd0c6ce9efbc3ef
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11a924c4d00000

Reported-by: syzbot+3e3d9bd0c6ce9efbc3ef@...kaller.appspotmail.com
Fixes: 4d004099a668 ("lockdep: Fix lockdep recursion")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection