diff options
Diffstat (limited to 'net/ipv6/ip6_gre.c')
| -rw-r--r-- | net/ipv6/ip6_gre.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 87b9892dfa23..b345b7e484c5 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -507,12 +507,11 @@ static int ip6erspan_rcv(struct sk_buff *skb, int gre_hdr_len, struct ip6_tnl *tunnel; u8 ver; - ipv6h = ipv6_hdr(skb); - ershdr = (struct erspan_base_hdr *)skb->data; - if (unlikely(!pskb_may_pull(skb, sizeof(*ershdr)))) return PACKET_REJECT; + ipv6h = ipv6_hdr(skb); + ershdr = (struct erspan_base_hdr *)skb->data; ver = (ntohs(ershdr->ver_vlan) & VER_MASK) >> VER_OFFSET; tpi->key = cpu_to_be32(ntohs(ershdr->session_id) & ID_MASK); @@ -551,8 +550,6 @@ static int ip6erspan_rcv(struct sk_buff *skb, int gre_hdr_len, info = &tun_dst->u.tun_info; md = ip_tunnel_info_opts(info); - if (!md) - return PACKET_REJECT; memcpy(md, pkt_md, sizeof(*md)); md->version = ver; @@ -603,12 +600,13 @@ static int gre_rcv(struct sk_buff *skb) tpi.proto == htons(ETH_P_ERSPAN2))) { if (ip6erspan_rcv(skb, hdr_len, &tpi) == PACKET_RCVD) return 0; - goto drop; + goto out; } if (ip6gre_rcv(skb, &tpi) == PACKET_RCVD) return 0; +out: icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); drop: kfree_skb(skb); @@ -1770,6 +1768,7 @@ static void ip6gre_tap_setup(struct net_device *dev) ether_setup(dev); + dev->max_mtu = 0; dev->netdev_ops = &ip6gre_tap_netdev_ops; dev->needs_free_netdev = true; dev->priv_destructor = ip6gre_dev_free; |