linux-kernel - [PATCH] gainfar.c : skb_over

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Message-ID: <4C232B13.5000706@extricom.com>
Date:	Thu, 24 Jun 2010 12:53:23 +0300
From:	Eran Liberty <liberty@...ricom.com>
To:	David Miller <davem@...emloft.net>
CC:	LKML <linux-kernel@...r.kernel.org>, galak@...nel.crashing.org
Subject: [PATCH] gainfar.c : skb_over_panic (kernel-2.6.32.15)

Fix possible skb_over_panic event in Freescale's "gianfar" driver. 

The skb_over_panic occurs due to calling skb_put() within 
gfar_clean_rx_ring(). This happens if (and only if) shortly prior to the 
event and a few lined above the skb_put(), an skb was queued back to the 
priv->rx_recycle queue due to RXBD_LAST or RXBD_ERR status.
The skb is queued without properly re-setting its state.

The patch properly reset the skb state.

I have tested this patch on MPC8548 based product and asserted it avoided the skb_over_panic event.

Signed-off-by: Eran Liberty <liberty@...ricom.com>

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View attachment "gianfar_skb_over_panic.patch" of type "text/x-diff" (611 bytes)