linux-kernel - [187/244] vlan: reset headers on accel emulation path

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Date:	Wed, 28 Sep 2011 15:02:31 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Jiri Pirko <jpirko@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [187/244] vlan: reset headers on accel emulation path

3.0-stable review patch.  If anyone has any objections, please let us know.

------------------


From: Jiri Pirko <jpirko@...hat.com>

[ Upstream commit c5114cd59d2664f258b0d021d79b1532d94bdc2b ]

It's after all necessary to do reset headers here. The reason is we
cannot depend that it gets reseted in __netif_receive_skb once skb is
reinjected. For incoming vlanids without vlan_dev, vlan_do_receive()
returns false with skb != NULL and __netif_reveive_skb continues, skb is
not reinjected.

This might be good material for 3.0-stable as well

Reported-by: Mike Auty <mike.auty@...il.com>
Signed-off-by: Jiri Pirko <jpirko@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
 net/8021q/vlan_core.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -171,6 +171,8 @@ struct sk_buff *vlan_untag(struct sk_buf
 	if (unlikely(!skb))
 		goto err_free;
 
+	skb_reset_network_header(skb);
+	skb_reset_transport_header(skb);
 	return skb;
 
 err_free:


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