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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Mon, 10 May 2021 08:09:42 +0200
Message-ID: <CACT4Y+a-WdDEJEx=E7gr2ci0F6U8ncvMgVSzph00H7U_qmc+_Q@mail.gmail.com>
Subject: Re: [syzbot] WARNING in hsr_forward_skb
To:     syzbot <syzbot+fdce8f2a8903f3ba0e6b@syzkaller.appspotmail.com>
Cc:     arvid.brodin@alten.se, Jens Axboe <axboe@fb.com>,
        Jens Axboe <axboe@kernel.dk>,
        David Miller <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Christoph Hellwig <hch@lst.de>,
        Jakub Kicinski <kuba@kernel.org>, kurt@linutronix.de,
        linux-block <linux-block@vger.kernel.org>,
        linux-can@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        m-karicheri2@ti.com, Ming Lei <ming.lei@redhat.com>,
        Marc Kleine-Budde <mkl@pengutronix.de>,
        netdev <netdev@vger.kernel.org>,
        Oliver Hartkopp <socketcan@hartkopp.net>,
        syzkaller-bugs <syzkaller-bugs@googlegroups.com>
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On Sun, May 9, 2021 at 5:16 PM syzbot
<syzbot+fdce8f2a8903f3ba0e6b@syzkaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit 9d6803921a16f4d768dc41a75375629828f4d91e
> Author: Kurt Kanzenbach <kurt@linutronix.de>
> Date:   Tue Apr 6 07:35:09 2021 +0000
>
>     net: hsr: Reset MAC header for Tx path
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=119c7fedd00000
> start commit:   3af409ca net: enetc: fix destroyed phylink dereference dur..
> git tree:       net
> kernel config:  https://syzkaller.appspot.com/x/.config?x=8cb23303ddb9411f
> dashboard link: https://syzkaller.appspot.com/bug?extid=fdce8f2a8903f3ba0e6b
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1525467ad00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=114c0b12d00000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: net: hsr: Reset MAC header for Tx path
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

The patch references this exact warning.

#syz fix: net: hsr: Reset MAC header for Tx path