From f468a729a2ddb1a26f8c4b98a82050e4030fe458 Mon Sep 17 00:00:00 2001 From: Jiri Benc Date: Tue, 16 Feb 2016 22:18:26 +0100 Subject: [PATCH] vxlan: do not use fdb in metadata mode In metadata mode, the vxlan interface is not supposed to use the fdb control plane but an external one (openvswitch or static routes). With the current code, packets may leak into the fdb handling code which usually causes them to be dropped anyway but may have strange side effects. Just drop the packets directly when in metadata mode if the destination data are not correctly provided on egress. Signed-off-by: Jiri Benc Signed-off-by: David S. Miller --- drivers/net/vxlan.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c index db96f3a16f6c..e6944b29588e 100644 --- a/drivers/net/vxlan.c +++ b/drivers/net/vxlan.c @@ -2171,9 +2171,11 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev) #endif } - if (vxlan->flags & VXLAN_F_COLLECT_METADATA && - info && info->mode & IP_TUNNEL_INFO_TX) { - vxlan_xmit_one(skb, dev, NULL, false); + if (vxlan->flags & VXLAN_F_COLLECT_METADATA) { + if (info && info->mode & IP_TUNNEL_INFO_TX) + vxlan_xmit_one(skb, dev, NULL, false); + else + kfree_skb(skb); return NETDEV_TX_OK; } -- 2.11.0