linux-kernel - Re: [syzbot] WARNING in folio_lruvec_lock

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Message-ID: <0000000000003ad3d705e23f66ae@google.com>
Date:   Fri, 24 Jun 2022 23:00:09 -0700
From:   syzbot <syzbot+ec972d37869318fc3ffb@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, cgroups@...r.kernel.org,
        hannes@...xchg.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mhocko@...nel.org, roman.gushchin@...ux.dev,
        shakeelb@...gle.com, songmuchun@...edance.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] WARNING in folio_lruvec_lock_irqsave

syzbot has bisected this issue to:

commit cca700a8e695fbe4a647e3a509ac513f05d5740a
Author: Muchun Song <songmuchun@...edance.com>
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@...kaller.appspotmail.com
Fixes: cca700a8e695 ("mm: lru: use lruvec lock to serialize memcg changes")

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