linux-kernel - Re: [syzbot] possible deadlock in io_poll_double

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Message-ID: <00000000000098f75305d7ba7942@google.com>
Date:   Fri, 11 Feb 2022 01:13:07 -0800
From:   syzbot <syzbot+e654d4e15e6b3b9deb53@...kaller.appspotmail.com>
To:     alaaemadhossney.ae@...il.com, asml.silence@...il.com,
        axboe@...nel.dk, dvyukov@...gle.com, hdanton@...a.com,
        io-uring@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] possible deadlock in io_poll_double_wake (3)

syzbot suspects this issue was fixed by commit:

commit aa43477b040251f451db0d844073ac00a8ab66ee
Author: Pavel Begunkov <asml.silence@...il.com>
Date:   Wed Dec 15 22:08:48 2021 +0000

    io_uring: poll rework

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=110d0baa700000
start commit:   c9e6606c7fe9 Linux 5.16-rc8
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=4772459294eb89cc
dashboard link: https://syzkaller.appspot.com/bug?extid=e654d4e15e6b3b9deb53
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10f87335b00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15ac8a73b00000

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

#syz fix: io_uring: poll rework

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