Re: [syzbot] general protection fault in __io_file_supports_nowait

[syzbot]

syzbot has bisected this issue to:

commit a8295b982c46d4a7c259a4cdd58a2681929068a9
Author: Hao Xu <haoxu@xxxxxxxxxxxxxxxxx>
Date:   Fri Aug 27 09:46:09 2021 +0000

    io_uring: fix failed linkchain code logic

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=147a8045300000
start commit:   b91db6a0b52e Merge tag 'for-5.15/io_uring-vfs-2021-08-30' ..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=167a8045300000
console output: https://syzkaller.appspot.com/x/log.txt?x=127a8045300000
kernel config:  https://syzkaller.appspot.com/x/.config?x=961d30359ac81f8c
dashboard link: https://syzkaller.appspot.com/bug?extid=e51249708aaa9b0e4d2c
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10a91625300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12512291300000

Reported-by: syzbot+e51249708aaa9b0e4d2c@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: a8295b982c46 ("io_uring: fix failed linkchain code logic")

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