[syzbot] WARNING: kobject bug in erofs_unregister_sysfs

[syzbot]

syzbot has bisected this issue to:

commit 2768c206f2c3e95c0e5cf2e7f846103fda7cd429
Author: Muchun Song <songmuchun at bytedance.com>
Date:   Thu Mar 3 01:15:36 2022 +0000

    mm: list_lru: allocate list_lru_one only when needed

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1495694d700000
start commit:   91265a6da44d Add linux-next specific files for 20220303
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1695694d700000
console output: https://syzkaller.appspot.com/x/log.txt?x=1295694d700000
kernel config:  https://syzkaller.appspot.com/x/.config?x=617f79440a35673a
dashboard link: https://syzkaller.appspot.com/bug?extid=f05ba4652c0471416eaf
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=137f17d9700000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=114ebabd700000

Reported-by: syzbot+f05ba4652c0471416eaf at syzkaller.appspotmail.com
Fixes: 2768c206f2c3 ("mm: list_lru: allocate list_lru_one only when needed")

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