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Date:   Mon, 15 Apr 2019 11:07:00 -0700
From:   syzbot <syzbot+16dc03452dee970a0c3e@...kaller.appspotmail.com>
To:     axboe@...nel.dk, hare@...e.com, linux-block@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, viro@...iv.linux.org.uk
Subject: Re: INFO: task hung in __io_uring_register

syzbot has bisected this bug to:

commit 6c271ce2f1d572f7fa225700a13cfe7ced492434
Author: Jens Axboe <axboe@...nel.dk>
Date:   Thu Jan 10 18:22:30 2019 +0000

     io_uring: add submission polling

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=161ab467200000
start commit:   dc4060a5 Linux 5.1-rc5
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=151ab467200000
console output: https://syzkaller.appspot.com/x/log.txt?x=111ab467200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=856fc6d0fbbeede9
dashboard link: https://syzkaller.appspot.com/bug?extid=16dc03452dee970a0c3e
userspace arch: i386
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14eb47ed200000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=112175dd200000

Reported-by: syzbot+16dc03452dee970a0c3e@...kaller.appspotmail.com
Fixes: 6c271ce2f1d5 ("io_uring: add submission polling")

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

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