netdev - Re: [PATCH] net: check the length of the data before dereferencing it

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Message-Id: <20120401.235533.147910953675133023.davem@davemloft.net>
Date:	Sun, 01 Apr 2012 23:55:33 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	xiaosuo@...il.com, kaber@...sh.net, pablo@...filter.org,
	netfilter-devel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] net: check the length of the data before dereferencing
 it

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Mon, 02 Apr 2012 05:45:45 +0200

> Usually not a problem since we have many bytes after our head.

We always have bytes after the head, it's guarenteed, and whether it's
garbage bytes or skb_shared_info() it simply doesn't matter.
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