netdev - Re: [PATCH net] netfilter: x_tables: avoid out-of-bounds reads in xt_request_find

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Message-ID: <20180124235056.ahubcyqostttvtbx@salvia>
Date:   Thu, 25 Jan 2018 00:50:56 +0100
From:   Pablo Neira Ayuso <pablo@...filter.org>
To:     Florian Westphal <fw@...len.de>
Cc:     Eric Dumazet <eric.dumazet@...il.com>,
        netdev <netdev@...r.kernel.org>, netfilter-devel@...r.kernel.org
Subject: Re: [PATCH net] netfilter: x_tables: avoid out-of-bounds reads in
 xt_request_find_match()

On Thu, Jan 25, 2018 at 12:19:52AM +0100, Florian Westphal wrote:
> Eric Dumazet <eric.dumazet@...il.com> wrote:
> > From: Eric Dumazet <edumazet@...gle.com>
> > 
> > It looks like syzbot found its way into netfilter territory.
> 
> Excellent.  This will sure allow to find and fix more bugs :-)
> 
> > Issue here is that @name comes from user space and might
> > not be null terminated.
> 
> Indeed, thanks for fixing this Eric.
> 
> xt_find_target() and xt_find_table_lock() might have similar issues.

I'm going to keep back this patch then, it would be good if we can
find this in one single patch.

Thanks.