linux-kernel - Re: [syzbot] [mm?] kernel BUG in filemap_unaccount

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Message-ID: <0000000000009e9e1b060569d17c@google.com>
Date:   Fri, 15 Sep 2023 11:18:26 -0700
From:   syzbot <syzbot+17a207d226b8a5fb0fd9@...kaller.appspotmail.com>
To:     akpm@...ux-foundation.org, christian.koenig@....com,
        daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
        fengwei.yin@...el.com, gurchetansingh@...omium.org,
        hughd@...gle.com, kraxel@...hat.com,
        linaro-mm-sig@...ts.linaro.org, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, linux-mm@...ck.org,
        sumit.semwal@...aro.org, syzkaller-bugs@...glegroups.com,
        vivek.kasireddy@...el.com
Subject: Re: [syzbot] [mm?] kernel BUG in filemap_unaccount_folio

syzbot has bisected this issue to:

commit 5c074eeabbd332b11559f7fc1e89d456f94801fb
Author: Gerd Hoffmann <kraxel@...hat.com>
Date:   Wed Nov 14 12:20:29 2018 +0000

    udmabuf: set read/write flag when exporting

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12b21bbfa80000
start commit:   db906f0ca6bb Merge tag 'phy-for-6.6' of git://git.kernel.o..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=11b21bbfa80000
console output: https://syzkaller.appspot.com/x/log.txt?x=16b21bbfa80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=3bd57a1ac08277b0
dashboard link: https://syzkaller.appspot.com/bug?extid=17a207d226b8a5fb0fd9
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11609f38680000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14c1fc00680000

Reported-by: syzbot+17a207d226b8a5fb0fd9@...kaller.appspotmail.com
Fixes: 5c074eeabbd3 ("udmabuf: set read/write flag when exporting")

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