Merge branch 'x86/hyperv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Topic branch for stable KVM clockource under Hyper-V.

Thanks to Christoffer Dall for resolving the ARM conflict.

20 files changed, 204 insertions, 113 deletions

diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index c26f71234b9c..c9441ca45399 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -210,7 +210,6 @@ lookup_protocol:
 	np->mcast_hops	= IPV6_DEFAULT_MCASTHOPS;
 	np->mc_loop	= 1;
 	np->pmtudisc	= IPV6_PMTUDISC_WANT;
-	np->autoflowlabel = ip6_default_np_autolabel(net);
 	np->repflow	= net->ipv6.sysctl.flowlabel_reflect;
 	sk->sk_ipv6only	= net->ipv6.sysctl.bindv6only;
 
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index a902ff8f59be..1a7f00cd4803 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -890,13 +890,12 @@ static int esp6_init_state(struct xfrm_state *x)
 			x->props.header_len += IPV4_BEET_PHMAXLEN +
 					       (sizeof(struct ipv6hdr) - sizeof(struct iphdr));
 		break;
+	default:
 	case XFRM_MODE_TRANSPORT:
 		break;
 	case XFRM_MODE_TUNNEL:
 		x->props.header_len += sizeof(struct ipv6hdr);
 		break;
-	default:
-		goto error;
 	}
 
 	align = ALIGN(crypto_aead_blocksize(aead), 4);
diff --git a/net/ipv6/esp6_offload.c b/net/ipv6/esp6_offload.c
index 333a478aa161..f52c314d4c97 100644
--- a/net/ipv6/esp6_offload.c
+++ b/net/ipv6/esp6_offload.c
@@ -60,7 +60,8 @@ static struct sk_buff **esp6_gro_receive(struct sk_buff **head,
 	int nhoff;
 	int err;
 
-	skb_pull(skb, offset);
+	if (!pskb_pull(skb, offset))
+		return NULL;
 
 	if ((err = xfrm_parse_spi(skb, IPPROTO_ESP, &spi, &seq)) != 0)
 		goto out;
@@ -148,6 +149,9 @@ static struct sk_buff *esp6_gso_segment(struct sk_buff *skb,
 	if (!xo)
 		goto out;
 
+	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_ESP))
+		goto out;
+
 	seq = xo->seq.low;
 
 	x = skb->sp->xvec[skb->sp->len - 1];
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 83bd75713535..bc68eb661970 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -925,6 +925,15 @@ static void ipv6_push_rthdr4(struct sk_buff *skb, u8 *proto,
 	sr_phdr->segments[0] = **addr_p;
 	*addr_p = &sr_ihdr->segments[sr_ihdr->segments_left];
 
+	if (sr_ihdr->hdrlen > hops * 2) {
+		int tlvs_offset, tlvs_length;
+
+		tlvs_offset = (1 + hops * 2) << 3;
+		tlvs_length = (sr_ihdr->hdrlen - hops * 2) << 3;
+		memcpy((char *)sr_phdr + tlvs_offset,
+		       (char *)sr_ihdr + tlvs_offset, tlvs_length);
+	}
+
 #ifdef CONFIG_IPV6_SEG6_HMAC
 	if (sr_has_hmac(sr_phdr)) {
 		struct net *net = NULL;
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index f5285f4e1d08..217683d40f12 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -640,6 +640,11 @@ static struct fib6_node *fib6_add_1(struct net *net,
 			if (!(fn->fn_flags & RTN_RTINFO)) {
 				RCU_INIT_POINTER(fn->leaf, NULL);
 				rt6_release(leaf);
+			/* remove null_entry in the root node */
+			} else if (fn->fn_flags & RTN_TL_ROOT &&
+				   rcu_access_pointer(fn->leaf) ==
+				   net->ipv6.ip6_null_entry) {
+				RCU_INIT_POINTER(fn->leaf, NULL);
 			}
 
 			return fn;
@@ -1221,8 +1226,14 @@ int fib6_add(struct fib6_node *root, struct rt6_info *rt,
 		}
 
 		if (!rcu_access_pointer(fn->leaf)) {
-			atomic_inc(&rt->rt6i_ref);
-			rcu_assign_pointer(fn->leaf, rt);
+			if (fn->fn_flags & RTN_TL_ROOT) {
+				/* put back null_entry for root node */
+				rcu_assign_pointer(fn->leaf,
+					    info->nl_net->ipv6.ip6_null_entry);
+			} else {
+				atomic_inc(&rt->rt6i_ref);
+				rcu_assign_pointer(fn->leaf, rt);
+			}
 		}
 		fn = sn;
 	}
@@ -1241,23 +1252,28 @@ out:
 		 * If fib6_add_1 has cleared the old leaf pointer in the
 		 * super-tree leaf node we have to find a new one for it.
 		 */
-		struct rt6_info *pn_leaf = rcu_dereference_protected(pn->leaf,
-					    lockdep_is_held(&table->tb6_lock));
-		if (pn != fn && pn_leaf == rt) {
-			pn_leaf = NULL;
-			RCU_INIT_POINTER(pn->leaf, NULL);
-			atomic_dec(&rt->rt6i_ref);
-		}
-		if (pn != fn && !pn_leaf && !(pn->fn_flags & RTN_RTINFO)) {
-			pn_leaf = fib6_find_prefix(info->nl_net, table, pn);
-#if RT6_DEBUG >= 2
-			if (!pn_leaf) {
-				WARN_ON(!pn_leaf);
-				pn_leaf = info->nl_net->ipv6.ip6_null_entry;
+		if (pn != fn) {
+			struct rt6_info *pn_leaf =
+				rcu_dereference_protected(pn->leaf,
+				    lockdep_is_held(&table->tb6_lock));
+			if (pn_leaf == rt) {
+				pn_leaf = NULL;
+				RCU_INIT_POINTER(pn->leaf, NULL);
+				atomic_dec(&rt->rt6i_ref);
 			}
+			if (!pn_leaf && !(pn->fn_flags & RTN_RTINFO)) {
+				pn_leaf = fib6_find_prefix(info->nl_net, table,
+							   pn);
+#if RT6_DEBUG >= 2
+				if (!pn_leaf) {
+					WARN_ON(!pn_leaf);
+					pn_leaf =
+					    info->nl_net->ipv6.ip6_null_entry;
+				}
 #endif
-			atomic_inc(&pn_leaf->rt6i_ref);
-			rcu_assign_pointer(pn->leaf, pn_leaf);
+				atomic_inc(&pn_leaf->rt6i_ref);
+				rcu_assign_pointer(pn->leaf, pn_leaf);
+			}
 		}
 #endif
 		goto failure;
@@ -1265,13 +1281,17 @@ out:
 	return err;
 
 failure:
-	/* fn->leaf could be NULL if fn is an intermediate node and we
-	 * failed to add the new route to it in both subtree creation
-	 * failure and fib6_add_rt2node() failure case.
-	 * In both cases, fib6_repair_tree() should be called to fix
-	 * fn->leaf.
+	/* fn->leaf could be NULL and fib6_repair_tree() needs to be called if:
+	 * 1. fn is an intermediate node and we failed to add the new
+	 * route to it in both subtree creation failure and fib6_add_rt2node()
+	 * failure case.
+	 * 2. fn is the root node in the table and we fail to add the first
+	 * default route to it.
 	 */
-	if (fn && !(fn->fn_flags & (RTN_RTINFO|RTN_ROOT)))
+	if (fn &&
+	    (!(fn->fn_flags & (RTN_RTINFO|RTN_ROOT)) ||
+	     (fn->fn_flags & RTN_TL_ROOT &&
+	      !rcu_access_pointer(fn->leaf))))
 		fib6_repair_tree(info->nl_net, table, fn);
 	/* Always release dst as dst->__refcnt is guaranteed
 	 * to be taken before entering this function
@@ -1526,6 +1546,12 @@ static struct fib6_node *fib6_repair_tree(struct net *net,
 	struct fib6_walker *w;
 	int iter = 0;
 
+	/* Set fn->leaf to null_entry for root node. */
+	if (fn->fn_flags & RTN_TL_ROOT) {
+		rcu_assign_pointer(fn->leaf, net->ipv6.ip6_null_entry);
+		return fn;
+	}
+
 	for (;;) {
 		struct fib6_node *fn_r = rcu_dereference_protected(fn->right,
 					    lockdep_is_held(&table->tb6_lock));
@@ -1680,10 +1706,15 @@ static void fib6_del_route(struct fib6_table *table, struct fib6_node *fn,
 	}
 	read_unlock(&net->ipv6.fib6_walker_lock);
 
-	/* If it was last route, expunge its radix tree node */
+	/* If it was last route, call fib6_repair_tree() to:
+	 * 1. For root node, put back null_entry as how the table was created.
+	 * 2. For other nodes, expunge its radix tree node.
+	 */
 	if (!rcu_access_pointer(fn->leaf)) {
-		fn->fn_flags &= ~RTN_RTINFO;
-		net->ipv6.rt6_stats->fib_route_nodes--;
+		if (!(fn->fn_flags & RTN_TL_ROOT)) {
+			fn->fn_flags &= ~RTN_RTINFO;
+			net->ipv6.rt6_stats->fib_route_nodes--;
+		}
 		fn = fib6_repair_tree(net, table, fn);
 	}
 
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 4cfd8e0696fe..873549228ccb 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -337,11 +337,12 @@ static struct ip6_tnl *ip6gre_tunnel_locate(struct net *net,
 
 	nt->dev = dev;
 	nt->net = dev_net(dev);
-	ip6gre_tnl_link_config(nt, 1);
 
 	if (register_netdevice(dev) < 0)
 		goto failed_free;
 
+	ip6gre_tnl_link_config(nt, 1);
+
 	/* Can use a lockless transmit, unless we generate output sequences */
 	if (!(nt->parms.o_flags & TUNNEL_SEQ))
 		dev->features |= NETIF_F_LLTX;
@@ -1014,6 +1015,36 @@ static void ip6gre_tunnel_setup(struct net_device *dev)
 	eth_random_addr(dev->perm_addr);
 }
 
+#define GRE6_FEATURES (NETIF_F_SG |		\
+		       NETIF_F_FRAGLIST |	\
+		       NETIF_F_HIGHDMA |	\
+		       NETIF_F_HW_CSUM)
+
+static void ip6gre_tnl_init_features(struct net_device *dev)
+{
+	struct ip6_tnl *nt = netdev_priv(dev);
+
+	dev->features		|= GRE6_FEATURES;
+	dev->hw_features	|= GRE6_FEATURES;
+
+	if (!(nt->parms.o_flags & TUNNEL_SEQ)) {
+		/* TCP offload with GRE SEQ is not supported, nor
+		 * can we support 2 levels of outer headers requiring
+		 * an update.
+		 */
+		if (!(nt->parms.o_flags & TUNNEL_CSUM) ||
+		    nt->encap.type == TUNNEL_ENCAP_NONE) {
+			dev->features    |= NETIF_F_GSO_SOFTWARE;
+			dev->hw_features |= NETIF_F_GSO_SOFTWARE;
+		}
+
+		/* Can use a lockless transmit, unless we generate
+		 * output sequences
+		 */
+		dev->features |= NETIF_F_LLTX;
+	}
+}
+
 static int ip6gre_tunnel_init_common(struct net_device *dev)
 {
 	struct ip6_tnl *tunnel;
@@ -1048,6 +1079,8 @@ static int ip6gre_tunnel_init_common(struct net_device *dev)
 	if (!(tunnel->parms.flags & IP6_TNL_F_IGN_ENCAP_LIMIT))
 		dev->mtu -= 8;
 
+	ip6gre_tnl_init_features(dev);
+
 	return 0;
 }
 
@@ -1271,7 +1304,6 @@ static void ip6gre_netlink_parms(struct nlattr *data[],
 
 static int ip6gre_tap_init(struct net_device *dev)
 {
-	struct ip6_tnl *tunnel;
 	int ret;
 
 	ret = ip6gre_tunnel_init_common(dev);
@@ -1280,10 +1312,6 @@ static int ip6gre_tap_init(struct net_device *dev)
 
 	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
 
-	tunnel = netdev_priv(dev);
-
-	ip6gre_tnl_link_config(tunnel, 1);
-
 	return 0;
 }
 
@@ -1298,16 +1326,12 @@ static const struct net_device_ops ip6gre_tap_netdev_ops = {
 	.ndo_get_iflink = ip6_tnl_get_iflink,
 };
 
-#define GRE6_FEATURES (NETIF_F_SG |		\
-		       NETIF_F_FRAGLIST |	\
-		       NETIF_F_HIGHDMA |		\
-		       NETIF_F_HW_CSUM)
-
 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;
@@ -1380,32 +1404,16 @@ static int ip6gre_newlink(struct net *src_net, struct net_device *dev,
 
 	nt->dev = dev;
 	nt->net = dev_net(dev);
-	ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
-
-	dev->features		|= GRE6_FEATURES;
-	dev->hw_features	|= GRE6_FEATURES;
-
-	if (!(nt->parms.o_flags & TUNNEL_SEQ)) {
-		/* TCP offload with GRE SEQ is not supported, nor
-		 * can we support 2 levels of outer headers requiring
-		 * an update.
-		 */
-		if (!(nt->parms.o_flags & TUNNEL_CSUM) ||
-		    (nt->encap.type == TUNNEL_ENCAP_NONE)) {
-			dev->features    |= NETIF_F_GSO_SOFTWARE;
-			dev->hw_features |= NETIF_F_GSO_SOFTWARE;
-		}
-
-		/* Can use a lockless transmit, unless we generate
-		 * output sequences
-		 */
-		dev->features |= NETIF_F_LLTX;
-	}
 
 	err = register_netdevice(dev);
 	if (err)
 		goto out;
 
+	ip6gre_tnl_link_config(nt, !tb[IFLA_MTU]);
+
+	if (tb[IFLA_MTU])
+		ip6_tnl_change_mtu(dev, nla_get_u32(tb[IFLA_MTU]));
+
 	dev_hold(dev);
 	ip6gre_tunnel_link(ign, nt);
 
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 5110a418cc4d..3763dc01e374 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -166,6 +166,14 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 			    !(IP6CB(skb)->flags & IP6SKB_REROUTED));
 }
 
+bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
+{
+	if (!np->autoflowlabel_set)
+		return ip6_default_np_autolabel(net);
+	else
+		return np->autoflowlabel;
+}
+
 /*
  * xmit an sk_buff (used by TCP, SCTP and DCCP)
  * Note : socket lock is not held for SYNACK packets, but might be modified
@@ -230,7 +238,7 @@ int ip6_xmit(const struct sock *sk, struct sk_buff *skb, struct flowi6 *fl6,
 		hlimit = ip6_dst_hoplimit(dst);
 
 	ip6_flow_hdr(hdr, tclass, ip6_make_flowlabel(net, skb, fl6->flowlabel,
-						     np->autoflowlabel, fl6));
+				ip6_autoflowlabel(net, np), fl6));
 
 	hdr->payload_len = htons(seg_len);
 	hdr->nexthdr = proto;
@@ -1198,14 +1206,16 @@ static int ip6_setup_cork(struct sock *sk, struct inet_cork_full *cork,
 	v6_cork->tclass = ipc6->tclass;
 	if (rt->dst.flags & DST_XFRM_TUNNEL)
 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(&rt->dst);
+		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(&rt->dst);
 	else
 		mtu = np->pmtudisc >= IPV6_PMTUDISC_PROBE ?
-		      rt->dst.dev->mtu : dst_mtu(rt->dst.path);
+		      READ_ONCE(rt->dst.dev->mtu) : dst_mtu(rt->dst.path);
 	if (np->frag_size < mtu) {
 		if (np->frag_size)
 			mtu = np->frag_size;
 	}
+	if (mtu < IPV6_MIN_MTU)
+		return -EINVAL;
 	cork->base.fragsize = mtu;
 	if (dst_allfrag(rt->dst.path))
 		cork->base.flags |= IPCORK_ALLFRAG;
@@ -1626,7 +1636,7 @@ struct sk_buff *__ip6_make_skb(struct sock *sk,
 
 	ip6_flow_hdr(hdr, v6_cork->tclass,
 		     ip6_make_flowlabel(net, skb, fl6->flowlabel,
-					np->autoflowlabel, fl6));
+					ip6_autoflowlabel(net, np), fl6));
 	hdr->hop_limit = v6_cork->hop_limit;
 	hdr->nexthdr = proto;
 	hdr->saddr = fl6->saddr;
@@ -1725,11 +1735,13 @@ struct sk_buff *ip6_make_skb(struct sock *sk,
 	cork.base.flags = 0;
 	cork.base.addr = 0;
 	cork.base.opt = NULL;
+	cork.base.dst = NULL;
 	v6_cork.opt = NULL;
 	err = ip6_setup_cork(sk, &cork, &v6_cork, ipc6, rt, fl6);
-	if (err)
+	if (err) {
+		ip6_cork_release(&cork, &v6_cork);
 		return ERR_PTR(err);
-
+	}
 	if (ipc6->dontfrag < 0)
 		ipc6->dontfrag = inet6_sk(sk)->dontfrag;
 
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index db84f523656d..1ee5584c3555 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -642,8 +642,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		if (rel_info > dst_mtu(skb_dst(skb2)))
 			goto out;
 
-		skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), NULL, skb2,
-						rel_info);
+		skb_dst_update_pmtu(skb2, rel_info);
 	}
 
 	icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
@@ -1074,10 +1073,11 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
 			memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));
 			neigh_release(neigh);
 		}
-	} else if (!(t->parms.flags &
-		     (IP6_TNL_F_USE_ORIG_TCLASS | IP6_TNL_F_USE_ORIG_FWMARK))) {
-		/* enable the cache only only if the routing decision does
-		 * not depend on the current inner header value
+	} else if (t->parms.proto != 0 && !(t->parms.flags &
+					    (IP6_TNL_F_USE_ORIG_TCLASS |
+					     IP6_TNL_F_USE_ORIG_FWMARK))) {
+		/* enable the cache only if neither the outer protocol nor the
+		 * routing decision depends on the current inner header value
 		 */
 		use_cache = true;
 	}
@@ -1123,10 +1123,14 @@ route_lookup:
 		max_headroom += 8;
 		mtu -= 8;
 	}
-	if (mtu < IPV6_MIN_MTU)
-		mtu = IPV6_MIN_MTU;
-	if (skb_dst(skb) && !t->parms.collect_md)
-		skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
+	if (skb->protocol == htons(ETH_P_IPV6)) {
+		if (mtu < IPV6_MIN_MTU)
+			mtu = IPV6_MIN_MTU;
+	} else if (mtu < 576) {
+		mtu = 576;
+	}
+
+	skb_dst_update_pmtu(skb, mtu);
 	if (skb->len - t->tun_hlen - eth_hlen > mtu && !skb_is_gso(skb)) {
 		*pmtu = mtu;
 		err = -EMSGSIZE;
@@ -1671,11 +1675,11 @@ int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu)
 {
 	struct ip6_tnl *tnl = netdev_priv(dev);
 
-	if (tnl->parms.proto == IPPROTO_IPIP) {
-		if (new_mtu < ETH_MIN_MTU)
+	if (tnl->parms.proto == IPPROTO_IPV6) {
+		if (new_mtu < IPV6_MIN_MTU)
 			return -EINVAL;
 	} else {
-		if (new_mtu < IPV6_MIN_MTU)
+		if (new_mtu < ETH_MIN_MTU)
 			return -EINVAL;
 	}
 	if (new_mtu > 0xFFF8 - dev->hard_header_len)
diff --git a/net/ipv6/ip6_vti.c b/net/ipv6/ip6_vti.c
index dbb74f3c57a7..8c184f84f353 100644
--- a/net/ipv6/ip6_vti.c
+++ b/net/ipv6/ip6_vti.c
@@ -483,7 +483,7 @@ vti6_xmit(struct sk_buff *skb, struct net_device *dev, struct flowi *fl)
 
 	mtu = dst_mtu(dst);
 	if (!skb->ignore_df && skb->len > mtu) {
-		skb_dst(skb)->ops->update_pmtu(dst, NULL, skb, mtu);
+		skb_dst_update_pmtu(skb, mtu);
 
 		if (skb->protocol == htons(ETH_P_IPV6)) {
 			if (mtu < IPV6_MIN_MTU)
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index b9404feabd78..e8ffb5b5d84e 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -886,6 +886,7 @@ pref_skip_coa:
 		break;
 	case IPV6_AUTOFLOWLABEL:
 		np->autoflowlabel = valbool;
+		np->autoflowlabel_set = 1;
 		retv = 0;
 		break;
 	case IPV6_RECVFRAGSIZE:
@@ -1335,7 +1336,7 @@ static int do_ipv6_getsockopt(struct sock *sk, int level, int optname,
 		break;
 
 	case IPV6_AUTOFLOWLABEL:
-		val = np->autoflowlabel;
+		val = ip6_autoflowlabel(sock_net(sk), np);
 		break;
 
 	case IPV6_RECVFRAGSIZE:
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index fc6d7d143f2c..844642682b83 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -1682,16 +1682,16 @@ static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
 }
 
 static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
-	int type, struct mld2_grec **ppgr)
+	int type, struct mld2_grec **ppgr, unsigned int mtu)
 {
-	struct net_device *dev = pmc->idev->dev;
 	struct mld2_report *pmr;
 	struct mld2_grec *pgr;
 
-	if (!skb)
-		skb = mld_newpack(pmc->idev, dev->mtu);
-	if (!skb)
-		return NULL;
+	if (!skb) {
+		skb = mld_newpack(pmc->idev, mtu);
+		if (!skb)
+			return NULL;
+	}
 	pgr = skb_put(skb, sizeof(struct mld2_grec));
 	pgr->grec_type = type;
 	pgr->grec_auxwords = 0;
@@ -1714,10 +1714,15 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
 	struct mld2_grec *pgr = NULL;
 	struct ip6_sf_list *psf, *psf_next, *psf_prev, **psf_list;
 	int scount, stotal, first, isquery, truncate;
+	unsigned int mtu;
 
 	if (pmc->mca_flags & MAF_NOREPORT)
 		return skb;
 
+	mtu = READ_ONCE(dev->mtu);
+	if (mtu < IPV6_MIN_MTU)
+		return skb;
+
 	isquery = type == MLD2_MODE_IS_INCLUDE ||
 		  type == MLD2_MODE_IS_EXCLUDE;
 	truncate = type == MLD2_MODE_IS_EXCLUDE ||
@@ -1738,7 +1743,7 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
 		    AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
 			if (skb)
 				mld_sendpack(skb);
-			skb = mld_newpack(idev, dev->mtu);
+			skb = mld_newpack(idev, mtu);
 		}
 	}
 	first = 1;
@@ -1774,12 +1779,12 @@ static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
 				pgr->grec_nsrcs = htons(scount);
 			if (skb)
 				mld_sendpack(skb);
-			skb = mld_newpack(idev, dev->mtu);
+			skb = mld_newpack(idev, mtu);
 			first = 1;
 			scount = 0;
 		}
 		if (first) {
-			skb = add_grhead(skb, pmc, type, &pgr);
+			skb = add_grhead(skb, pmc, type, &pgr, mtu);
 			first = 0;
 		}
 		if (!skb)
@@ -1814,7 +1819,7 @@ empty_source:
 				mld_sendpack(skb);
 				skb = NULL; /* add_grhead will get a new one */
 			}
-			skb = add_grhead(skb, pmc, type, &pgr);
+			skb = add_grhead(skb, pmc, type, &pgr, mtu);
 		}
 	}
 	if (pgr)
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index f06e25065a34..66a8c69a3db4 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -282,12 +282,7 @@ ip6t_do_table(struct sk_buff *skb,
 
 	local_bh_disable();
 	addend = xt_write_recseq_begin();
-	private = table->private;
-	/*
-	 * Ensure we load private-> members after we've fetched the base
-	 * pointer.
-	 */
-	smp_read_barrier_depends();
+	private = READ_ONCE(table->private); /* Address dependency. */
 	cpu        = smp_processor_id();
 	table_base = private->entries;
 	jumpstack  = (struct ip6t_entry **)private->jumpstack[cpu];
@@ -458,7 +453,6 @@ mark_source_chains(const struct xt_table_info *newinfo,
 					if (!xt_find_jump_offset(offsets, newpos,
 								 newinfo->number))
 						return 0;
-					e = entry0 + newpos;
 				} else {
 					/* ... this is a fallthru */
 					newpos = pos + e->next_offset;
diff --git a/net/ipv6/netfilter/ip6t_MASQUERADE.c b/net/ipv6/netfilter/ip6t_MASQUERADE.c
index 2b1a15846f9a..92c0047e7e33 100644
--- a/net/ipv6/netfilter/ip6t_MASQUERADE.c
+++ b/net/ipv6/netfilter/ip6t_MASQUERADE.c
@@ -33,13 +33,19 @@ static int masquerade_tg6_checkentry(const struct xt_tgchk_param *par)
 
 	if (range->flags & NF_NAT_RANGE_MAP_IPS)
 		return -EINVAL;
-	return 0;
+	return nf_ct_netns_get(par->net, par->family);
+}
+
+static void masquerade_tg6_destroy(const struct xt_tgdtor_param *par)
+{
+	nf_ct_netns_put(par->net, par->family);
 }
 
 static struct xt_target masquerade_tg6_reg __read_mostly = {
 	.name		= "MASQUERADE",
 	.family		= NFPROTO_IPV6,
 	.checkentry	= masquerade_tg6_checkentry,
+	.destroy	= masquerade_tg6_destroy,
 	.target		= masquerade_tg6,
 	.targetsize	= sizeof(struct nf_nat_range),
 	.table		= "nat",
diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index 7a8d1500d374..0458b761f3c5 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2336,6 +2336,7 @@ struct dst_entry *icmp6_dst_alloc(struct net_device *dev,
 	}
 
 	rt->dst.flags |= DST_HOST;
+	rt->dst.input = ip6_input;
 	rt->dst.output  = ip6_output;
 	rt->rt6i_gateway  = fl6->daddr;
 	rt->rt6i_dst.addr = fl6->daddr;
@@ -4297,19 +4298,13 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 		if (!ipv6_addr_any(&fl6.saddr))
 			flags |= RT6_LOOKUP_F_HAS_SADDR;
 
-		if (!fibmatch)
-			dst = ip6_route_input_lookup(net, dev, &fl6, flags);
-		else
-			dst = ip6_route_lookup(net, &fl6, 0);
+		dst = ip6_route_input_lookup(net, dev, &fl6, flags);
 
 		rcu_read_unlock();
 	} else {
 		fl6.flowi6_oif = oif;
 
-		if (!fibmatch)
-			dst = ip6_route_output(net, NULL, &fl6);
-		else
-			dst = ip6_route_lookup(net, &fl6, 0);
+		dst = ip6_route_output(net, NULL, &fl6);
 	}
 
 
@@ -4326,6 +4321,15 @@ static int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 		goto errout;
 	}
 
+	if (fibmatch && rt->dst.from) {
+		struct rt6_info *ort = container_of(rt->dst.from,
+						    struct rt6_info, dst);
+
+		dst_hold(&ort->dst);
+		ip6_rt_put(rt);
+		rt = ort;
+	}
+
 	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 	if (!skb) {
 		ip6_rt_put(rt);
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index d7dc23c1b2ca..3873d3877135 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -934,8 +934,8 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
 			df = 0;
 		}
 
-		if (tunnel->parms.iph.daddr && skb_dst(skb))
-			skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
+		if (tunnel->parms.iph.daddr)
+			skb_dst_update_pmtu(skb, mtu);
 
 		if (skb->len > mtu && !skb_is_gso(skb)) {
 			icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, mtu);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 1f04ec0e4a7a..7178476b3d2f 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -994,7 +994,7 @@ static void tcp_v6_reqsk_send_ack(const struct sock *sk, struct sk_buff *skb,
 			req->rsk_rcv_wnd >> inet_rsk(req)->rcv_wscale,
 			tcp_time_stamp_raw() + tcp_rsk(req)->ts_off,
 			req->ts_recent, sk->sk_bound_dev_if,
-			tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->daddr),
+			tcp_v6_md5_do_lookup(sk, &ipv6_hdr(skb)->saddr),
 			0, 0);
 }
 
diff --git a/net/ipv6/tcpv6_offload.c b/net/ipv6/tcpv6_offload.c
index d883c9204c01..278e49cd67d4 100644
--- a/net/ipv6/tcpv6_offload.c
+++ b/net/ipv6/tcpv6_offload.c
@@ -46,6 +46,9 @@ static struct sk_buff *tcp6_gso_segment(struct sk_buff *skb,
 {
 	struct tcphdr *th;
 
+	if (!(skb_shinfo(skb)->gso_type & SKB_GSO_TCPV6))
+		return ERR_PTR(-EINVAL);
+
 	if (!pskb_may_pull(skb, sizeof(*th)))
 		return ERR_PTR(-EINVAL);
 
diff --git a/net/ipv6/udp_offload.c b/net/ipv6/udp_offload.c
index a0f89ad76f9d..2a04dc9c781b 100644
--- a/net/ipv6/udp_offload.c
+++ b/net/ipv6/udp_offload.c
@@ -42,6 +42,9 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb,
 		const struct ipv6hdr *ipv6h;
 		struct udphdr *uh;
 
+		if (!(skb_shinfo(skb)->gso_type & SKB_GSO_UDP))
+			goto out;
+
 		if (!pskb_may_pull(skb, sizeof(struct udphdr)))
 			goto out;
 
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index fe04e23af986..841f4a07438e 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -32,6 +32,14 @@ int xfrm6_rcv_spi(struct sk_buff *skb, int nexthdr, __be32 spi,
 }
 EXPORT_SYMBOL(xfrm6_rcv_spi);
 
+static int xfrm6_transport_finish2(struct net *net, struct sock *sk,
+				   struct sk_buff *skb)
+{
+	if (xfrm_trans_queue(skb, ip6_rcv_finish))
+		__kfree_skb(skb);
+	return -1;
+}
+
 int xfrm6_transport_finish(struct sk_buff *skb, int async)
 {
 	struct xfrm_offload *xo = xfrm_offload(skb);
@@ -56,7 +64,7 @@ int xfrm6_transport_finish(struct sk_buff *skb, int async)
 
 	NF_HOOK(NFPROTO_IPV6, NF_INET_PRE_ROUTING,
 		dev_net(skb->dev), NULL, skb, skb->dev, NULL,
-		ip6_rcv_finish);
+		xfrm6_transport_finish2);
 	return -1;
 }
 
diff --git a/net/ipv6/xfrm6_mode_tunnel.c b/net/ipv6/xfrm6_mode_tunnel.c
index 02556e356f87..dc93002ff9d1 100644
--- a/net/ipv6/xfrm6_mode_tunnel.c
+++ b/net/ipv6/xfrm6_mode_tunnel.c
@@ -92,6 +92,7 @@ static int xfrm6_mode_tunnel_input(struct xfrm_state *x, struct sk_buff *skb)
 
 	skb_reset_network_header(skb);
 	skb_mac_header_rebuild(skb);
+	eth_hdr(skb)->h_proto = skb->protocol;
 
 	err = 0;