netdev - Re: [PATCH net] batman-adv: fix skb->data assignment

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Date:	Tue, 19 Jun 2012 14:49:41 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	ordex@...istici.org
Cc:	netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org,
	stable@...r.kernel.org
Subject: Re: [PATCH net] batman-adv: fix skb->data assignment

From: Antonio Quartulli <ordex@...istici.org>
Date: Tue, 19 Jun 2012 21:26:39 +0200

> skb_linearize(skb) possibly rearranges the skb internal data and then changes
> the skb->data pointer value. For this reason any other pointer in the code that
> was assigned skb->data before invoking skb_linearise(skb) must be re-assigned.
> 
> In the current tt_query message handling code this is not done and therefore, in
> case of skb linearization, the pointer used to handle the packet header ends up
> in pointing to free'd memory.
> 
> This bug was introduced by a73105b8d4c765d9ebfb664d0a66802127d8e4c7
> (batman-adv: improved client announcement mechanism)
> 
> Signed-off-by: Antonio Quartulli <ordex@...istici.org>
> Cc: <stable@...r.kernel.org>

Applied.

Submit things properly in the future so you don't give me unnecessary
merge hassles like this again.
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