syzbot has bisected this issue to:
commit 483fc4e30869f8bd1693aca9cffddb21fb303b32
Author: Pavel Begunkov <asml.silence@xxxxxxxxx>
Date: Sun Aug 15 09:40:26 2021 +0000
io_uring: optimise io_prep_linked_timeout()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16fada7e300000
start commit: b9011c7e671d Add linux-next specific files for 20210816
git tree: linux-next
final oops: https://syzkaller.appspot.com/x/report.txt?x=15fada7e300000
console output: https://syzkaller.appspot.com/x/log.txt?x=11fada7e300000
kernel config: https://syzkaller.appspot.com/x/.config?x=a245d1aa4f055cc1
dashboard link: https://syzkaller.appspot.com/bug?extid=2b85e9379c34945fe38f
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17479216300000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=147f0111300000
Reported-by: syzbot+2b85e9379c34945fe38f@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 483fc4e30869 ("io_uring: optimise io_prep_linked_timeout()")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
