8 files changed, 30 insertions, 11 deletions

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 4564e1fca3eb..0e32d2e1bdbf 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -502,11 +502,11 @@ static int ip6gre_rcv(struct sk_buff *skb)
 
                 skb->protocol = gre_proto;
                 /* WCCP version 1 and 2 protocol decoding.
-                 * - Change protocol to IP
+                 * - Change protocol to IPv6
                  * - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
                  */
                 if (flags == 0 && gre_proto == htons(ETH_P_WCCP)) {
-                        skb->protocol = htons(ETH_P_IP);
+                        skb->protocol = htons(ETH_P_IPV6);
                         if ((*(h + offset) & 0xF0) != 0x40)
                                 offset += 4;
                 }
diff --git a/net/ipv6/ip6_offload.c b/net/ipv6/ip6_offload.c
index a071563a7e6e..01e12d0d8fcc 100644
--- a/net/ipv6/ip6_offload.c
+++ b/net/ipv6/ip6_offload.c
@@ -69,7 +69,8 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
         int nhoff;
 
         if (unlikely(skb_shinfo(skb)->gso_type &
-                     ~(SKB_GSO_UDP |
+                     ~(SKB_GSO_TCPV4 |
+                       SKB_GSO_UDP |
                        SKB_GSO_DODGY |
                        SKB_GSO_TCP_ECN |
                        SKB_GSO_GRE |
diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c
index b04ed72c4542..8db6c98fe218 100644
--- a/net/ipv6/ip6_udp_tunnel.c
+++ b/net/ipv6/ip6_udp_tunnel.c
@@ -79,15 +79,13 @@ int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
         uh->source = src_port;
 
         uh->len = htons(skb->len);
-        uh->check = 0;
 
         memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt));
         IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED
                             | IPSKB_REROUTED);
         skb_dst_set(skb, dst);
 
-        udp6_set_csum(udp_get_no_check6_tx(sk), skb, &inet6_sk(sk)->saddr,
-                      &sk->sk_v6_daddr, skb->len);
+        udp6_set_csum(udp_get_no_check6_tx(sk), skb, saddr, daddr, skb->len);
 
         __skb_push(skb, sizeof(*ip6h));
         skb_reset_network_header(skb);
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index 31089d153fd3..bcda14de7f84 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -905,6 +905,15 @@ static int vti6_newlink(struct net *src_net, struct net_device *dev,
         return vti6_tnl_create2(dev);
 }
 
+static void vti6_dellink(struct net_device *dev, struct list_head *head)
+{
+        struct net *net = dev_net(dev);
+        struct vti6_net *ip6n = net_generic(net, vti6_net_id);
+
+        if (dev != ip6n->fb_tnl_dev)
+                unregister_netdevice_queue(dev, head);
+}
+
 static int vti6_changelink(struct net_device *dev, struct nlattr *tb[],
                            struct nlattr *data[])
 {
@@ -980,6 +989,7 @@ static struct rtnl_link_ops vti6_link_ops __read_mostly = {
         .setup          = vti6_dev_setup,
         .validate       = vti6_validate,
         .newlink        = vti6_newlink,
+        .dellink        = vti6_dellink,
         .changelink     = vti6_changelink,
         .get_size       = vti6_get_size,
         .fill_info      = vti6_fill_info,
@@ -1020,6 +1030,7 @@ static int __net_init vti6_init_net(struct net *net)
         if (!ip6n->fb_tnl_dev)
                 goto err_alloc_dev;
         dev_net_set(ip6n->fb_tnl_dev, net);
+        ip6n->fb_tnl_dev->rtnl_link_ops = &vti6_link_ops;
 
         err = vti6_fb_tnl_dev_init(ip6n->fb_tnl_dev);
         if (err < 0)
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 0171f08325c3..1a01d79b8698 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1439,6 +1439,10 @@ reg_pernet_fail:
 
 void ip6_mr_cleanup(void)
 {
+        rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE);
+#ifdef CONFIG_IPV6_PIMSM_V2
+        inet6_del_protocol(&pim6_protocol, IPPROTO_PIM);
+#endif
         unregister_netdevice_notifier(&ip6_mr_notifier);
         unregister_pernet_subsys(&ip6mr_net_ops);
         kmem_cache_destroy(mrt_cachep);
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 9648de2b6745..ed2c4e400b46 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1550,7 +1550,7 @@ static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
         hdr->daddr = *daddr;
 }
 
-static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
+static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu)
 {
         struct net_device *dev = idev->dev;
         struct net *net = dev_net(dev);
@@ -1561,13 +1561,13 @@ static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
         const struct in6_addr *saddr;
         int hlen = LL_RESERVED_SPACE(dev);
         int tlen = dev->needed_tailroom;
+        unsigned int size = mtu + hlen + tlen;
         int err;
         u8 ra[8] = { IPPROTO_ICMPV6, 0,
                      IPV6_TLV_ROUTERALERT, 2, 0, 0,
                      IPV6_TLV_PADN, 0 };
 
         /* we assume size > sizeof(ra) here */
-        size += hlen + tlen;
         /* limit our allocations to order-0 page */
         size = min_t(int, size, SKB_MAX_ORDER(0, 0));
         skb = sock_alloc_send_skb(sk, size, 1, &err);
@@ -1576,6 +1576,8 @@ static struct sk_buff *mld_newpack(struct inet6_dev *idev, int size)
                 return NULL;
 
         skb->priority = TC_PRIO_CONTROL;
+        skb->reserved_tailroom = skb_end_offset(skb) -
+                                 min(mtu, skb_end_offset(skb));
         skb_reserve(skb, hlen);
 
         if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
@@ -1690,8 +1692,7 @@ static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
         return skb;
 }
 
-#define AVAILABLE(skb) ((skb) ? ((skb)->dev ? (skb)->dev->mtu - (skb)->len : \
-        skb_tailroom(skb)) : 0)
+#define AVAILABLE(skb)  ((skb) ? skb_availroom(skb) : 0)
 
 static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
         int type, int gdeleted, int sdeleted, int crsend)
diff --git a/net/ipv6/netfilter/nft_masq_ipv6.c b/net/ipv6/netfilter/nft_masq_ipv6.c
index 8a7ac685076d..529c119cbb14 100644
--- a/net/ipv6/netfilter/nft_masq_ipv6.c
+++ b/net/ipv6/netfilter/nft_masq_ipv6.c
@@ -25,6 +25,7 @@ static void nft_masq_ipv6_eval(const struct nft_expr *expr,
         struct nf_nat_range range;
         unsigned int verdict;
 
+        memset(&range, 0, sizeof(range));
         range.flags = priv->flags;
 
         verdict = nf_nat_masquerade_ipv6(pkt->skb, &range, pkt->out);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index ace29b60813c..dc495ae2ead0 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -903,7 +903,10 @@ static void tcp_v6_send_reset(struct sock *sk, struct sk_buff *skb)
         if (th->rst)
                 return;
 
-        if (!ipv6_unicast_destination(skb))
+        /* If sk not NULL, it means we did a successful lookup and incoming
+         * route had to be correct. prequeue might have dropped our dst.
+         */
+        if (!sk && !ipv6_unicast_destination(skb))
                 return;
 
 #ifdef CONFIG_TCP_MD5SIG