netdev - Re: general protection fault in ipt_do

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Message-ID: <CACT4Y+a18OmXX=V_mAOzqc3txT9C8piJWJa=rN7aWfRk0yfo0g@mail.gmail.com>
Date:   Mon, 12 Feb 2018 17:31:23 +0100
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Florian Westphal <fw@...len.de>
Cc:     syzbot <syzbot+c914fd8c6a751c4fddbd@...kaller.appspotmail.com>,
        netdev <netdev@...r.kernel.org>, netfilter-devel@...r.kernel.org,
        Pablo Neira Ayuso <pablo@...filter.org>,
        syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in ipt_do_table

On Mon, Feb 12, 2018 at 5:20 PM, Florian Westphal <fw@...len.de> wrote:
> syzbot <syzbot+c914fd8c6a751c4fddbd@...kaller.appspotmail.com> wrote:
>> Hello,
>>
>> syzbot hit the following crash on net-next commit
>> 9a61df9e5f7471fe5be3e02bd0bed726b2761a54 (Sat Feb 10 03:32:41 2018 +0000)
>> Merge tag 'kbuild-v4.16-2' of
>> git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
>>
>> So far this crash happened 2 times on net-next, upstream.
>> C reproducer is attached.
>> syzkaller reproducer is attached.
>> Raw console output is attached.
>> compiler: gcc (GCC) 7.1.1 20170620
>> .config is attached.
>
> #sys-dup: general protection fault in ip6t_do_table

this should read as:

#syz dup: general protection fault in ip6t_do_table

> (well, its not strictly a duplicate but ip(6)tables is copypastry
>  sauce so its bug compatible, the fix I sent for ip6tables report
>  also fixes ip and arptables.)