From 49fc90b443c71b3cdbfaf15c0c15fc7e3ffc5731 Mon Sep 17 00:00:00 2001 From: Sabrina Dubroca Date: Tue, 3 Jan 2017 16:26:04 +0100 Subject: benet: stricter vxlan offloading check in be_features_check [ Upstream commit 096de2f83ebc8e0404c5b7e847a4abd27b9739da ] When VXLAN offloading is enabled, be_features_check() tries to check if an encapsulated packet is indeed a VXLAN packet. The check is not strict enough, and considers any UDP-encapsulated ethernet frame with a 8-byte tunnel header as being VXLAN. Unfortunately, both GENEVE and VXLAN-GPE have a 8-byte header, so they get through this check. Force the UDP destination port to be the one that has been offloaded to hardware. Without this, GENEVE-encapsulated packets can end up having an incorrect checksum when both a GENEVE and a VXLAN (offloaded) tunnel are configured. This is similar to commit a547224dceed ("mlx4e: Do not attempt to offload VXLAN ports that are unrecognized"). Signed-off-by: Sabrina Dubroca Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c index b3c9cbe..5626908 100644 --- a/drivers/net/ethernet/emulex/benet/be_main.c +++ b/drivers/net/ethernet/emulex/benet/be_main.c @@ -5186,7 +5186,9 @@ static netdev_features_t be_features_check(struct sk_buff *skb, skb->inner_protocol_type != ENCAP_TYPE_ETHER || skb->inner_protocol != htons(ETH_P_TEB) || skb_inner_mac_header(skb) - skb_transport_header(skb) != - sizeof(struct udphdr) + sizeof(struct vxlanhdr)) + sizeof(struct udphdr) + sizeof(struct vxlanhdr) || + !adapter->vxlan_port || + udp_hdr(skb)->dest != adapter->vxlan_port) return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK); return features; -- cgit v0.10.2