netdev - Re: [PATCH v3] Prevent crashing when parsing bad X.25 facilities

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Message-Id: <20101112.124532.15255032.davem@davemloft.net>
Date:	Fri, 12 Nov 2010 12:45:32 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	drosenberg@...curity.com
Cc:	andrew.hendry@...il.com, netdev@...r.kernel.org
Subject: Re: [PATCH v3] Prevent crashing when parsing bad X.25 facilities

From: Dan Rosenberg <drosenberg@...curity.com>
Date: Fri, 12 Nov 2010 15:42:28 -0500

> Now with improved comma support.
> 
> On parsing malformed X.25 facilities, decrementing the remaining length
> may cause it to underflow.  Since the length is an unsigned integer,
> this will result in the loop continuing until the kernel crashes.
> 
> This patch adds checks to ensure decrementing the remaining length does
> not cause it to wrap around.
> 
> Signed-off-by: Dan Rosenberg <drosenberg@...curity.com>

Applied.
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