linux-kernel - [PATCH 3.14 18/37] bridge: Fix br_should_learn to check vlan

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Message-Id: <20141013022401.059100620@linuxfoundation.org>
Date:	Mon, 13 Oct 2014 04:24:15 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Toshiaki Makita <toshiaki.makita1@...il.com>,
	Vladislav Yasevich <vyasevic@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.14 18/37] bridge: Fix br_should_learn to check vlan_enabled

3.14-stable review patch.  If anyone has any objections, please let me know.

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

From: Vlad Yasevich <vyasevich@...il.com>

[ Upstream commit c095f248e63ada504dd90c90baae673ae10ee3fe ]

As Toshiaki Makita pointed out, the BRIDGE_INPUT_SKB_CB will
not be initialized in br_should_learn() as that function
is called only from br_handle_local_finish().  That is
an input handler for link-local ethernet traffic so it perfectly
correct to check br->vlan_enabled here.

Reported-by: Toshiaki Makita<toshiaki.makita1@...il.com>
Fixes: 20adfa1 bridge: Check if vlan filtering is enabled only once.
Signed-off-by: Vladislav Yasevich <vyasevic@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/bridge/br_vlan.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -254,7 +254,7 @@ bool br_should_learn(struct net_bridge_p
 	struct net_port_vlans *v;
 
 	/* If filtering was disabled at input, let it pass. */
-	if (!BR_INPUT_SKB_CB(skb)->vlan_filtered)
+	if (!br->vlan_enabled)
 		return true;
 
 	v = rcu_dereference(p->vlan_info);


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