syzbot has bisected this issue to:
commit dce28769a33a95425b007f00842d6e12ffa28f83
Author: Qu Wenruo <wqu@xxxxxxxx>
Date: Sat Sep 2 00:13:57 2023 +0000
btrfs: qgroup: use qgroup_iterator_nested to in qgroup_update_refcnt()
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14f01717680000
start commit: 90b0c2b2edd1 Merge tag 'pinctrl-v6.7-1' of git://git.kerne..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=16f01717680000
console output: https://syzkaller.appspot.com/x/log.txt?x=12f01717680000
kernel config: https://syzkaller.appspot.com/x/.config?x=4cc8c922092464e7
dashboard link: https://syzkaller.appspot.com/bug?extid=e0b615318f8fcfc01ceb
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14cae708e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1354647b680000
Reported-by: syzbot+e0b615318f8fcfc01ceb@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: dce28769a33a ("btrfs: qgroup: use qgroup_iterator_nested to in qgroup_update_refcnt()")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
