linux-kernel - Re: [PATCH] Staging: comedi: fix information leak

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Message-ID: <20150310064440.GK10964@mwanda>
Date:	Tue, 10 Mar 2015 09:44:40 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Matteo Semenzato <mattew8898@...il.com>
Cc:	gregkh@...uxfoundation.org, abbotti@....co.uk,
	hsweeten@...ionengravers.com, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Staging: comedi: fix information leak

On Mon, Mar 09, 2015 at 09:08:17PM +0100, Matteo Semenzato wrote:
> From: Matteo Semenzato <mattew8898@...il.com>
> 
> The comedi_cmd struct has an hole after chanlist_len that could contain uninitialized
> memory, this struct is copied to userspace.
> 

Is this a Smatch warning?  If so then, I appologize because it's a false
positive.  You really need to have the cross function database built for
that test to work.

The struct is initialized in __comedi_get_user_cmd().

regards,
dan carpenter

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