linux-kernel - Re: [syzbot] [xfs?] KASAN: use-after-free Read in xfs_btree_lookup_get

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Message-ID: <CANp29Y6G_1hKheTLG9NeSWv4+GYK=zOsUuu_sKCWqEBwGeOYig@mail.gmail.com>
Date:   Mon, 15 May 2023 11:05:10 +0200
From:   Aleksandr Nogikh <nogikh@...gle.com>
To:     syzbot <syzbot+7e9494b8b399902e994e@...kaller.appspotmail.com>
Cc:     david@...morbit.com, dchinner@...hat.com, djwong@...nel.org,
        linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-xfs@...r.kernel.org, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [xfs?] KASAN: use-after-free Read in xfs_btree_lookup_get_block

On Sat, May 13, 2023 at 7:29 PM syzbot
<syzbot+7e9494b8b399902e994e@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 22ed903eee23a5b174e240f1cdfa9acf393a5210
> Author: Darrick J. Wong <djwong@...nel.org>
> Date:   Wed Apr 12 05:49:23 2023 +0000
>
>     xfs: verify buffer contents when we skip log replay
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12710f7a280000
> start commit:   1b929c02afd3 Linux 6.2-rc1
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=68e0be42c8ee4bb4
> dashboard link: https://syzkaller.appspot.com/bug?extid=7e9494b8b399902e994e
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=172ff2e4480000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11715ea8480000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: xfs: verify buffer contents when we skip log replay

#syz fix: xfs: verify buffer contents when we skip log replay

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