netdev - Re: [patch v2] phonet: some signedness bugs

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Message-Id: <20110110.160620.133889003.davem@davemloft.net>
Date:	Mon, 10 Jan 2011 16:06:20 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	error27@...il.com
Cc:	remi.denis-courmont@...ia.com, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org, dan.j.rosenberg@...il.com
Subject: Re: [patch v2] phonet: some signedness bugs

From: Dan Carpenter <error27@...il.com>
Date: Mon, 10 Jan 2011 17:06:58 +0300

> Dan Rosenberg pointed out that there were some signed comparison bugs
> in the phonet protocol.
> 
> http://marc.info/?l=full-disclosure&m=129424528425330&w=2
> 
> The problem is that we check for array overflows but "protocol" is
> signed and we don't check for array underflows.  If you have already
> have CAP_SYS_ADMIN then you could use the bugs to get root, or someone
> could cause an oops by mistake.
> 
> Signed-off-by: Dan Carpenter <error27@...il.com>

Applied.
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