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
