linux-kernel - Re: WARNING: ODEBUG bug in exit_to_user_mode

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Date:   Thu, 08 Oct 2020 01:44:07 -0700
From:   syzbot <syzbot+fbd7ba7207767ed15165@...kaller.appspotmail.com>
To:     axboe@...nel.dk, bfoster@...hat.com, darrick.wong@...cle.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-xfs@...r.kernel.org, maz@...nel.org, oleg@...hat.com,
        peterz@...radead.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: WARNING: ODEBUG bug in exit_to_user_mode_prepare

syzbot suspects this issue was fixed by commit:

commit 9c516e0e4554e8f26ab73d46cbc789d7d8db664d
Author: Brian Foster <bfoster@...hat.com>
Date:   Tue Aug 18 15:05:58 2020 +0000

    xfs: finish dfops on every insert range shift iteration

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=157f71e0500000
start commit:   dcc5c6f0 Merge tag 'x86-urgent-2020-08-30' of git://git.ke..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=978db74cb30aa994
dashboard link: https://syzkaller.appspot.com/bug?extid=fbd7ba7207767ed15165
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1447c115900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1344f9fe900000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: xfs: finish dfops on every insert range shift iteration

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