Re: [syzbot] WARNING in folio_lruvec_lock_irqsave

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syzbot has bisected this issue to:

commit cca700a8e695fbe4a647e3a509ac513f05d5740a
Author: Muchun Song <songmuchun@xxxxxxxxxxxxx>
Date:   Tue Jun 21 12:56:58 2022 +0000

    mm: lru: use lruvec lock to serialize memcg changes

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=15abaf18080000
start commit:   ac0ba5454ca8 Add linux-next specific files for 20220622
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=17abaf18080000
console output: https://syzkaller.appspot.com/x/log.txt?x=13abaf18080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=12809dacb9e7c5e0
dashboard link: https://syzkaller.appspot.com/bug?extid=ec972d37869318fc3ffb
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12d0f470080000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1145df0ff00000

Reported-by: syzbot+ec972d37869318fc3ffb@xxxxxxxxxxxxxxxxxxxxxxxxx
Fixes: cca700a8e695 ("mm: lru: use lruvec lock to serialize memcg changes")

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




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