Upgrade to 4.4.50-rt62

[kvmfornfv.git] / kernel / net / dccp / ipv6.c

diff --git a/kernel/net/dccp/ipv6.c b/kernel/net/dccp/ipv6.c
index b8608b7..27c4e81 100644 (file)
--- a/kernel/net/dccp/ipv6.c
+++ b/kernel/net/dccp/ipv6.c
@@ -70,7 +70,7 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
                        u8 type, u8 code, int offset, __be32 info)
 {
        const struct ipv6hdr *hdr = (const struct ipv6hdr *)skb->data;
-       const struct dccp_hdr *dh = (struct dccp_hdr *)(skb->data + offset);
+       const struct dccp_hdr *dh;
        struct dccp_sock *dp;
        struct ipv6_pinfo *np;
        struct sock *sk;
@@ -78,12 +78,13 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
        __u64 seq;
        struct net *net = dev_net(skb->dev);
 
-       if (skb->len < offset + sizeof(*dh) ||
-           skb->len < offset + __dccp_basic_hdr_len(dh)) {
-               ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev),
-                                  ICMP6_MIB_INERRORS);
-               return;
-       }
+       /* Only need dccph_dport & dccph_sport which are the first
+        * 4 bytes in dccp header.
+        * Our caller (icmpv6_notify()) already pulled 8 bytes for us.
+        */
+       BUILD_BUG_ON(offsetofend(struct dccp_hdr, dccph_sport) > 8);
+       BUILD_BUG_ON(offsetofend(struct dccp_hdr, dccph_dport) > 8);
+       dh = (struct dccp_hdr *)(skb->data + offset);
 
        sk = __inet6_lookup_established(net, &dccp_hashinfo,
                                        &hdr->daddr, dh->dccph_dport,
@@ -947,6 +948,7 @@ static const struct inet_connection_sock_af_ops dccp_ipv6_mapped = {
        .getsockopt        = ipv6_getsockopt,
        .addr2sockaddr     = inet6_csk_addr2sockaddr,
        .sockaddr_len      = sizeof(struct sockaddr_in6),
+       .bind_conflict     = inet6_csk_bind_conflict,
 #ifdef CONFIG_COMPAT
        .compat_setsockopt = compat_ipv6_setsockopt,
        .compat_getsockopt = compat_ipv6_getsockopt,