syzbot has bisected this issue to:
commit 9fd472af84abd6da15376353c2283b3df9497646
Author: NeilBrown <neilb@xxxxxxx>
Date: Tue Mar 22 21:38:54 2022 +0000
mm: improve cleanup when ->readpages doesn't process all pages
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1285d453280000
start commit: 64569520920a Merge tag 'block-6.4-2023-06-09' of git://git..
git tree: upstream
final oops: https://syzkaller.appspot.com/x/report.txt?x=1185d453280000
console output: https://syzkaller.appspot.com/x/log.txt?x=1685d453280000
kernel config: https://syzkaller.appspot.com/x/.config?x=3c980bfe8b399968
dashboard link: https://syzkaller.appspot.com/bug?extid=af224b63e76b2d869bc3
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15835795280000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16966d43280000
Reported-by: syzbot+af224b63e76b2d869bc3@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: 9fd472af84ab ("mm: improve cleanup when ->readpages doesn't process all pages")
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
