netdev - Re: net/packet: use-after-free in packet_rcv

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Message-ID: <1486750551.7793.153.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Fri, 10 Feb 2017 10:15:51 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Dmitry Vyukov <dvyukov@...gle.com>,
        David Miller <davem@...emloft.net>,
        Willem de Bruijn <willemb@...gle.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Daniel Borkmann <daniel@...earbox.net>, jarno@....org,
        Sowmini Varadhan <sowmini.varadhan@...cle.com>,
        Philip Pettersson <philip.pettersson@...il.com>,
        weongyo.linux@...il.com, netdev <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        syzkaller <syzkaller@...glegroups.com>
Subject: Re: net/packet: use-after-free in packet_rcv_fanout

On Fri, 2017-02-10 at 10:02 -0800, Cong Wang wrote:

> I don't have to give a 100% correct patch to prove my explanation
> of the crash. At least it makes more sense than yours...

I will submit it regardless of what you think.

It solves _another_ issue, one of of 10 in af_packet.c