releases/2.6.33.10/gro-reset-skb_iif-on-reuse.patch

From 6d152e23ad1a7a5b40fef1f42e017d66e6115159 Mon Sep 17 00:00:00 2001
From: Andy Gospodarek <andy@greyhouse.net>
Date: Wed, 2 Feb 2011 14:53:25 -0800
Subject: gro: reset skb_iif on reuse

From: Andy Gospodarek <andy@greyhouse.net>

commit 6d152e23ad1a7a5b40fef1f42e017d66e6115159 upstream.

Like Herbert's change from a few days ago:

66c46d741e2e60f0e8b625b80edb0ab820c46d7a gro: Reset dev pointer on reuse

this may not be necessary at this point, but we should still clean up
the skb->skb_iif.  If not we may end up with an invalid valid for
skb->skb_iif when the skb is reused and the check is done in
__netif_receive_skb.

Signed-off-by: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Brandon Philips <bphilips@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 net/core/dev.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2747,6 +2747,7 @@ void napi_reuse_skb(struct napi_struct *
 	__skb_pull(skb, skb_headlen(skb));
 	skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
 	skb->dev = napi->dev;
+	skb->skb_iif = 0;
 
 	napi->skb = skb;
 }