netdev - Re: kernel BUG at net/ipv4/ip

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Date:   Thu, 7 Nov 2019 11:58:41 -0500
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     syzbot <syzbot+90d5ec0c05e708f3b66d@...kaller.appspotmail.com>
Cc:     Alexei Starovoitov <ast@...nel.org>, bpf <bpf@...r.kernel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        David Miller <davem@...emloft.net>,
        David Ahern <dsahern@...il.com>, johannes.berg@...el.com,
        Martin Lau <kafai@...com>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Peter Oskolkov <posk@...gle.com>, songliubraving@...com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        Yonghong Song <yhs@...com>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Subject: Re: kernel BUG at net/ipv4/ip_output.c:LINE!

On Thu, Nov 7, 2019 at 8:42 AM syzbot
<syzbot+90d5ec0c05e708f3b66d@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this bug was fixed by commit:
>
> commit e7c87bd6cc4ec7b0ac1ed0a88a58f8206c577488
> Author: Willem de Bruijn <willemb@...gle.com>
> Date:   Wed Jan 16 01:19:22 2019 +0000
>
>      bpf: in __bpf_redirect_no_mac pull mac only if present
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=14175486600000
> start commit:   112cbae2 Merge branch 'linus' of git://git.kernel.org/pub/..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=152cb8ccd35b1f70
> dashboard link: https://syzkaller.appspot.com/bug?extid=90d5ec0c05e708f3b66d
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=153ed6e2400000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1539038c400000
>
> If the result looks correct, please mark the bug fixed by replying with:
>
> #syz fix: bpf: in __bpf_redirect_no_mac pull mac only if present

#syz fix: bpf: in __bpf_redirect_no_mac pull mac only if present