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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Fri, 27 Jan 2023 08:16:42 +0100
Message-ID: <CACT4Y+b_JkNCPOgx=xdUNTZqwwmoaxOSC9obsZnuPa3rZnWKag@mail.gmail.com>
Subject: Re: [syzbot] WARNING in pskb_expand_head
To:     syzbot <syzbot+a1c17e56a8a62294c714@syzkaller.appspotmail.com>
Cc:     alexanderduyck@fb.com, andrii@kernel.org, ast@kernel.org,
        bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net,
        edumazet@google.com, hawk@kernel.org, john.fastabend@gmail.com,
        kafai@fb.com, kpsingh@kernel.org, kuba@kernel.org,
        linux-kernel@vger.kernel.org, mst@redhat.com,
        netdev@vger.kernel.org, pabeni@redhat.com, songliubraving@fb.com,
        syzkaller-bugs@googlegroups.com, willemb@google.com, yhs@fb.com
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On Wed, 25 Jan 2023 at 16:31, syzbot
<syzbot+a1c17e56a8a62294c714@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit dbae2b062824fc2d35ae2d5df2f500626c758e80
> Author: Paolo Abeni <pabeni@redhat.com>
> Date:   Wed Sep 28 08:43:09 2022 +0000
>
>     net: skb: introduce and use a single page frag cache
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16a58035480000
> start commit:   bf682942cd26 Merge tag 'scsi-fixes' of git://git.kernel.or..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=b68d4454cd7c7d91
> dashboard link: https://syzkaller.appspot.com/bug?extid=a1c17e56a8a62294c714
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14b18438880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=120c9038880000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: net: skb: introduce and use a single page frag cache
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks reasonable. Let's close the bug report:

#syz fix: net: skb: introduce and use a single page frag cache