From: Andy Gospodarek <andy@greyhouse.net>
Date: Wed, 2 Feb 2011 22:53:25 +0000 (-0800)
Subject: gro: reset skb_iif on reuse
X-Git-Tag: firefly_0821_release~10186^2~221
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5381fb84ee42aba44952a94ef8ecc1d29c52fae3;p=firefly-linux-kernel-4.4.55.git

gro: reset skb_iif on reuse

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>
---

diff --git a/net/core/dev.c b/net/core/dev.c
index e58422e7ea4e..64eb849c60b3 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2615,6 +2615,7 @@ void napi_reuse_skb(struct napi_struct *napi, struct sk_buff *skb)
 	__skb_pull(skb, skb_headlen(skb));
 	skb_reserve(skb, NET_IP_ALIGN - skb_headroom(skb));
 	skb->dev = napi->dev;
+	skb->iif = 0;
 
 	napi->skb = skb;
 }