Re: INFO: task hung in io_uring_flush

[syzbot]

syzbot has bisected this issue to:

commit f86cd20c9454847a524ddbdcdec32c0380ed7c9b
Author: Jens Axboe <axboe@xxxxxxxxx>
Date:   Wed Jan 29 20:46:44 2020 +0000

    io_uring: fix linked command file table usage

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16db4d3a900000
start commit:   9420f1ce Merge tag 'pinctrl-v5.9-1' of git://git.kernel.or..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=15db4d3a900000
console output: https://syzkaller.appspot.com/x/log.txt?x=11db4d3a900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=72cf85e4237850c8
dashboard link: https://syzkaller.appspot.com/bug?extid=6338dcebf269a590b668
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=141dde52900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15b196aa900000

Reported-by: syzbot+6338dcebf269a590b668@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: f86cd20c9454 ("io_uring: fix linked command file table usage")

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