linux-kernel - Re: [syzbot] [ext4?] possible deadlock in jbd2_log_wait

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Date:   Wed, 01 Mar 2023 02:08:19 -0800
From:   syzbot <syzbot+9d16c39efb5fade84574@...kaller.appspotmail.com>
To:     hdanton@...a.com, jack@...e.com, jack@...e.cz,
        linux-ext4@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com,
        tytso@....edu
Subject: Re: [syzbot] [ext4?] possible deadlock in jbd2_log_wait_commit

syzbot has bisected this issue to:

commit 0813299c586b175d7edb25f56412c54b812d0379
Author: Jan Kara <jack@...e.cz>
Date:   Thu Jan 26 11:22:21 2023 +0000

    ext4: Fix possible corruption when moving a directory

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14845d50c80000
start commit:   e492250d5252 Merge tag 'pwm/for-6.3-rc1' of git://git.kern..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=16845d50c80000
console output: https://syzkaller.appspot.com/x/log.txt?x=12845d50c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=f763d89e26d3d4c4
dashboard link: https://syzkaller.appspot.com/bug?extid=9d16c39efb5fade84574
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11d96208c80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=176d917f480000

Reported-by: syzbot+9d16c39efb5fade84574@...kaller.appspotmail.com
Fixes: 0813299c586b ("ext4: Fix possible corruption when moving a directory")

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