netdev - Re: general protection fault in ipt_do

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Message-ID: <20180212162013.GA27605@breakpoint.cc>
Date:   Mon, 12 Feb 2018 17:20:13 +0100
From:   Florian Westphal <fw@...len.de>
To:     syzbot <syzbot+c914fd8c6a751c4fddbd@...kaller.appspotmail.com>
Cc:     netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        pablo@...filter.org, syzkaller-bugs@...glegroups.com
Subject: Re: general protection fault in ipt_do_table

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

(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.)