netdev - Re: [patch] ppp: potential NULL dereference in ppp_mp

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Date:	Mon, 13 Sep 2010 12:45:30 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	error27@...il.com
Cc:	paulus@...ba.org, simon@...e.lp0.eu, ben@...servers.co.uk,
	shemminger@...tta.com, lsorense@...lub.uwaterloo.ca,
	linux-ppp@...r.kernel.org, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] ppp: potential NULL dereference in ppp_mp_explode()

From: Dan Carpenter <error27@...il.com>
Date: Fri, 10 Sep 2010 13:58:10 +0200

> Smatch complains because we check whether "pch->chan" is NULL and then
> dereference it unconditionally on the next line.  Partly the reason this
> bug was introduced is because code was too complicated.  I've simplified
> it a little.
> 
> Signed-off-by: Dan Carpenter <error27@...il.com>
> ---
> Compile tested only.  Perhaps it would be better to set pch->speed to
> zero?  The comments say that zero implies the speed hasn't been set.

I think how you've fixed it is OK, actually this whole MP rewrite
could use some more auditing :-)

Applied, thanks Dan.
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