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Message-ID: <000000000000e127ec0604dcce27@google.com>
Date:   Fri, 08 Sep 2023 11:04:30 -0700
From:   syzbot <syzbot+b591856e0f0139f83023@...kaller.appspotmail.com>
To:     42.hyeyoo@...il.com, Liam.Howlett@...cle.com,
        agordeev@...ux.ibm.com, akpm@...ux-foundation.org,
        alexghiti@...osinc.com, aou@...s.berkeley.edu,
        borntraeger@...ux.ibm.com, cgroups@...r.kernel.org,
        christophe.leroy@...roup.eu, damon@...ts.linux.dev,
        david@...hat.com, eadavis@...a.com, frankja@...ux.ibm.com,
        gerald.schaefer@...ux.ibm.com, gor@...ux.ibm.com,
        hannes@...xchg.org, hca@...ux.ibm.com, imbrenda@...ux.ibm.com,
        jeeheng.sia@...rfivetech.com, jglisse@...hat.com,
        kvm@...r.kernel.org, leyfoon.tan@...rfivetech.com,
        linmiaohe@...wei.com, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org, mason.huo@...rfivetech.com,
        mhocko@...nel.org, mpe@...erman.id.au, muchun.song@...ux.dev,
        naoya.horiguchi@....com, npiggin@...il.com, palmer@...belt.com,
        paul.walmsley@...ive.com, roman.gushchin@...ux.dev,
        sebastian.reichel@...labora.com, shakeelb@...gle.com,
        sj@...nel.org, surenb@...gle.com, svens@...ux.ibm.com,
        syzkaller-bugs@...glegroups.com, willy@...radead.org
Subject: Re: [syzbot] [mm?] kernel BUG in vma_replace_policy

syzbot has bisected this issue to:

commit 49b0638502da097c15d46cd4e871dbaa022caf7c
Author: Suren Baghdasaryan <surenb@...gle.com>
Date:   Fri Aug 4 15:27:19 2023 +0000

    mm: enable page walking API to lock vmas during the walk

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11fd2348680000
start commit:   7733171926cc Merge tag 'mailbox-v6.6' of git://git.linaro...
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=13fd2348680000
console output: https://syzkaller.appspot.com/x/log.txt?x=15fd2348680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b273cdfbc13e9a4b
dashboard link: https://syzkaller.appspot.com/bug?extid=b591856e0f0139f83023
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15d4ecd0680000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1055c284680000

Reported-by: syzbot+b591856e0f0139f83023@...kaller.appspotmail.com
Fixes: 49b0638502da ("mm: enable page walking API to lock vmas during the walk")

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

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