netdev - Re: [PATCH net-2.6] sundance: Fix oopses with corrupted skb_shared

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Date:	Sat, 25 Dec 2010 19:42:10 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	soete.joel@...rlet.be, eric.dumazet@...il.com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-2.6] sundance: Fix oopses with corrupted
 skb_shared_info

From: Jarek Poplawski <jarkao2@...il.com>
Date: Sat, 25 Dec 2010 16:12:17 +0100

> [PATCH net-2.6] sundance: Fix oopses with corrupted skb_shared_info
> 
> Joel Soete reported oopses at the beginning of pppoe connections since
> v2.6.35. After debugging the bug was found in sundance skb allocation
> and dma mapping code, where skb_reserve() bytes aren't taken into
> account. This is an old bug, only uncovered by some change in 2.6.35.
> 
> Initial debugging patch by: Eric Dumazet <eric.dumazet@...il.com>
> 
> Reported-by: Joel Soete <soete.joel@...rlet.be>
> Tested-by: Joel Soete <soete.joel@...rlet.be>
> Signed-off-by: Jarek Poplawski <jarkao2@...il.com>
> Cc: Eric Dumazet <eric.dumazet@...il.com>

Applied, great work Jarek.

I was auditing ppp_generic.c hoping I'd find something, but
if I had that backtrace I wouldn't have bothered :-)
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