Re: INFO: task hung in io_uring_flush

[syzbot]

syzbot suspects this issue was fixed by commit:

commit b7ddce3cbf010edbfac6c6d8cc708560a7bcd7a4
Author: Pavel Begunkov <asml.silence@xxxxxxxxx>
Date:   Sat Sep 5 21:45:14 2020 +0000

    io_uring: fix cancel of deferred reqs with ->files

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=173d9b0d900000
start commit:   9123e3a7 Linux 5.9-rc1
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=3d400a47d1416652
dashboard link: https://syzkaller.appspot.com/bug?extid=6338dcebf269a590b668
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1573f116900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=144d3072900000

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

#syz fix: io_uring: fix cancel of deferred reqs with ->files

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