netdev - Re: [patch] filter: use unsigned int to silence static checker warning

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Message-Id: <20111019.193605.621716042975197432.davem@davemloft.net>
Date:	Wed, 19 Oct 2011 19:36:05 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	dan.carpenter@...cle.com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com, xiaosuo@...il.com,
	kernel-janitors@...r.kernel.org
Subject: Re: [patch] filter: use unsigned int to silence static checker
 warning

From: Dan Carpenter <dan.carpenter@...cle.com>
Date: Tue, 18 Oct 2011 10:04:20 +0300

> This is just a cleanup.
> 
> My testing version of Smatch warns about this:
> net/core/filter.c +380 check_load_and_stores(6)
> 	warn: check 'flen' for negative values
> 
> flen comes from the user.  We try to clamp the values here between 1
> and BPF_MAXINSNS but the clamp doesn't work because it could be
> negative.  This is a bug, but it's not exploitable.
> 
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Applied to net-next, thanks Dan.
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