From 173e79fb70a98b5b223f8dc09c22990d777bdd78 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Thu, 30 Sep 2010 02:16:44 +0000 Subject: [PATCH] vlan: dont drop packets from unknown vlans in promiscuous mode Roger Luethi noticed packets for unknown VLANs getting silently dropped even in promiscuous mode. Check for promiscuous mode in __vlan_hwaccel_rx() and vlan_gro_common() before drops. As suggested by Patrick, mark such packets to have skb->pkt_type set to PACKET_OTHERHOST to make sure they are dropped by IP stack. Reported-by: Roger Luethi Signed-off-by: Eric Dumazet CC: Patrick McHardy Signed-off-by: David S. Miller --- net/8021q/vlan_core.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c index 01ddb0472f86..0eb96f7e44be 100644 --- a/net/8021q/vlan_core.c +++ b/net/8021q/vlan_core.c @@ -24,8 +24,11 @@ int __vlan_hwaccel_rx(struct sk_buff *skb, struct vlan_group *grp, if (vlan_dev) skb->dev = vlan_dev; - else if (vlan_id) - goto drop; + else if (vlan_id) { + if (!(skb->dev->flags & IFF_PROMISC)) + goto drop; + skb->pkt_type = PACKET_OTHERHOST; + } return (polling ? netif_receive_skb(skb) : netif_rx(skb)); @@ -102,8 +105,11 @@ vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp, if (vlan_dev) skb->dev = vlan_dev; - else if (vlan_id) - goto drop; + else if (vlan_id) { + if (!(skb->dev->flags & IFF_PROMISC)) + goto drop; + skb->pkt_type = PACKET_OTHERHOST; + } for (p = napi->gro_list; p; p = p->next) { NAPI_GRO_CB(p)->same_flow = -- 2.20.1