linux-kernel - Re: [PATCH 3.10 007/180] netfilter: x

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Message-ID: <20160821212125.GA21874@1wt.eu>
Date:   Sun, 21 Aug 2016 23:21:25 +0200
From:   Willy Tarreau <w@....eu>
To:     Florian Westphal <fw@...len.de>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jay <MyMailClone@...nline.de>
Subject: Re: [PATCH 3.10 007/180] netfilter: x_tables: validate targets of
 jumps

On Sun, Aug 21, 2016 at 10:16:16PM +0200, Florian Westphal wrote:
> Willy Tarreau <w@....eu> wrote:
> > On Sun, Aug 21, 2016 at 05:28:57PM +0200, Willy Tarreau wrote:
> > > From: Florian Westphal <fw@...len.de>
> > > 
> > > commit 36472341017529e2b12573093cc0f68719300997 upstream.
> > > 
> > > When we see a jump also check that the offset gets us to beginning of
> > > a rule (an ipt_entry).
> > (...)
> > 
> > Sorry, this patch is bad and causes performance issues, I didn't notice
> > that 3.14 had a different version, below. Thanks to Jay for reporting
> > the problem to me. I'll push 3.10.103-rc2 after some cool down period.
> 
> Please either hold this one back or also queue
> commit f4dc77713f8016d2e8a3295e1c9c53a21f296def
> netfilter: x_tables: speed up jump target validation
> 
> It supersedes this one.

OK, I'm postponing it then, as the patch above is not yet in more recent
stable versions.

Thanks Florian!
Willy