netdev - Re: [PATCH] gianfar: fix potential sk_wmem

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Message-Id: <20120709.152827.1547447409352502785.davem@davemloft.net>
Date:	Mon, 09 Jul 2012 15:28:27 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, manfred.rudigier@...cron.at,
	claudiu.manoil@...escale.com, b06378@...escale.com,
	paul.gortmaker@...driver.com, afleming@...escale.com
Subject: Re: [PATCH] gianfar: fix potential sk_wmem_alloc imbalance

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Thu, 05 Jul 2012 23:45:13 +0200

> From: Eric Dumazet <edumazet@...gle.com>
> 
> commit db83d136d7f753 (gianfar: Fix missing sock reference when
> processing TX time stamps) added a potential sk_wmem_alloc imbalance
> 
> If the new skb has a different truesize than old one, we can get a
> negative sk_wmem_alloc once new skb is orphaned at TX completion.
> 
> Now we no longer early orphan skbs in dev_hard_start_xmit(), this
> probably can lead to fatal bugs.
> 
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Manfred Rudigier <manfred.rudigier@...cron.at>
> Cc: Claudiu Manoil <claudiu.manoil@...escale.com>
> Cc: Jiajun Wu <b06378@...escale.com>
> Cc: Paul Gortmaker <paul.gortmaker@...driver.com>
> Cc: Andy Fleming <afleming@...escale.com>

Now that this has been tested by Paul, I've applied it.

Thanks.
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