linux-kernel - Re: possible deadlock in do_io

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Date:   Sat, 25 Apr 2020 07:32:03 -0700
From:   syzbot <syzbot+87a1b40b8fcdc9d40bd0@...kaller.appspotmail.com>
To:     adobriyan@...il.com, akpm@...ux-foundation.org, avagin@...il.com,
        bernd.edlinger@...mail.de, casey@...aufler-ca.com,
        christian@...uner.io, ebiederm@...ssion.com,
        kent.overstreet@...il.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, mhocko@...e.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de
Subject: Re: possible deadlock in do_io_accounting (3)

syzbot suspects this bug was fixed by commit:

commit 76518d3798855242817e8a8ed76b2d72f4415624
Author: Bernd Edlinger <bernd.edlinger@...mail.de>
Date:   Fri Mar 20 20:27:41 2020 +0000

    proc: io_accounting: Use new infrastructure to fix deadlocks in execve

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=124347cfe00000
start commit:   46cf053e Linux 5.5-rc3
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=ed9d672709340e35
dashboard link: https://syzkaller.appspot.com/bug?extid=87a1b40b8fcdc9d40bd0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15693866e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12847615e00000

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

#syz fix: proc: io_accounting: Use new infrastructure to fix deadlocks in execve

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