From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH] net: check the length of the data before dereferencing
 it
Date: Mon, 02 Apr 2012 05:58:25 +0200
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To: David Miller <davem@davemloft.net>
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On Sun, 2012-04-01 at 23:55 -0400, David Miller wrote:
> From: Eric Dumazet <eric.dumazet@gmail.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.

Then you have to add a kmemcheck_something() to make this clear and
avoid possible warnings.