linux-kernel - Re: [PATCH] tg3: fix tigon3_dma_hwbug

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Message-Id: <20111022.033020.2073551679260143993.davem@davemloft.net>
Date:	Sat, 22 Oct 2011 03:30:20 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	ari.m.savolainen@...il.com, roy.qing.li@...il.com,
	richardcochran@...il.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tg3: fix tigon3_dma_hwbug_workaround()

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Sat, 22 Oct 2011 09:25:38 +0200

> Ari got kernel panics using tg3 NIC, and bisected to 2669069aacc9 "tg3:
> enable transmit time stamping."
> 
> This is because tigon3_dma_hwbug_workaround() might alloc a new skb and
> free the original. We panic when skb_tx_timestamp() is called on freed
> skb.
> 
> Reported-by: Ari Savolainen <ari.m.savolainen@...il.com>
> Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>

Applied, thanks Eric.
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