linux-kernel - Re: [syzbot] [gfs2?] BUG: unable to handle kernel NULL pointer dereference in gfs2_rgrp

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Message-ID: <0000000000006e8bd80604052481@google.com>
Date:   Mon, 28 Aug 2023 17:46:32 -0700
From:   syzbot <syzbot+da0fc229cc1ff4bb2e6d@...kaller.appspotmail.com>
To:     agruenba@...hat.com, cluster-devel@...hat.com,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        rpeterso@...hat.com, swhiteho@...hat.com,
        syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [gfs2?] BUG: unable to handle kernel NULL pointer
 dereference in gfs2_rgrp_dump

syzbot has bisected this issue to:

commit 72244b6bc752b5c496f09de9a13c18adc314a53c
Author: Bob Peterson <rpeterso@...hat.com>
Date:   Wed Aug 15 17:09:49 2018 +0000

    gfs2: improve debug information when lvb mismatches are found

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1593747ba80000
start commit:   0a924817d2ed Merge tag '6.2-rc-smb3-client-fixes-part2' of..
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=1793747ba80000
console output: https://syzkaller.appspot.com/x/log.txt?x=1393747ba80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4e2d7bfa2d6d5a76
dashboard link: https://syzkaller.appspot.com/bug?extid=da0fc229cc1ff4bb2e6d
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=12e5bf7f880000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13952f5d880000

Reported-by: syzbot+da0fc229cc1ff4bb2e6d@...kaller.appspotmail.com
Fixes: 72244b6bc752 ("gfs2: improve debug information when lvb mismatches are found")

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