diff options
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index f200b304f76cb..2d8efeecf6197 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -578,6 +578,8 @@ static void erspan_fb_xmit(struct sk_buff *skb, struct net_device *dev, int tunnel_hlen; int version; __be16 df; + int nhoff; + int thoff; tun_info = skb_tunnel_info(skb); if (unlikely(!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX) || @@ -605,6 +607,16 @@ static void erspan_fb_xmit(struct sk_buff *skb, struct net_device *dev, truncate = true; } + nhoff = skb_network_header(skb) - skb_mac_header(skb); + if (skb->protocol == htons(ETH_P_IP) && + (ntohs(ip_hdr(skb)->tot_len) > skb->len - nhoff)) + truncate = true; + + thoff = skb_transport_header(skb) - skb_mac_header(skb); + if (skb->protocol == htons(ETH_P_IPV6) && + (ntohs(ipv6_hdr(skb)->payload_len) > skb->len - thoff)) + truncate = true; + if (version == 1) { erspan_build_header(skb, ntohl(tunnel_id_to_key32(key->tun_id)), ntohl(md->u.index), truncate, true); |