linux-kernel - Re: [syzbot] [kernel?] possible deadlock in exit

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Date:   Fri, 16 Jun 2023 22:14:21 -0700
From:   syzbot <syzbot+5fd924f4cd9dc1c7828c@...kaller.appspotmail.com>
To:     frederic@...nel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: Re: [syzbot] [kernel?] possible deadlock in exit_itimers

syzbot has bisected this issue to:

commit 1b59b2577582f9cf3d0f17245675a76859175cc1
Author: Thomas Gleixner <tglx@...utronix.de>
Date:   Thu Jun 1 20:16:34 2023 +0000

    posix-timers: Prevent RT livelock in itimer_delete()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=106d46e3280000
start commit:   f7efed9f38f8 Add linux-next specific files for 20230616
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=126d46e3280000
console output: https://syzkaller.appspot.com/x/log.txt?x=146d46e3280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=60b1a32485a77c16
dashboard link: https://syzkaller.appspot.com/bug?extid=5fd924f4cd9dc1c7828c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1401d8ef280000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=176b45cf280000

Reported-by: syzbot+5fd924f4cd9dc1c7828c@...kaller.appspotmail.com
Fixes: 1b59b2577582 ("posix-timers: Prevent RT livelock in itimer_delete()")

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