4 files changed, 289 insertions, 184 deletions

diff --git a/drivers/net/vxlan/vxlan_core.c b/drivers/net/vxlan/vxlan_core.c
index 16106e088c63..92516189e792 100644
--- a/drivers/net/vxlan/vxlan_core.c
+++ b/drivers/net/vxlan/vxlan_core.c
@@ -277,8 +277,7 @@ static void __vxlan_fdb_notify(struct vxlan_dev *vxlan, struct vxlan_fdb *fdb,
 	rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC);
 	return;
 errout:
-	if (err < 0)
-		rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
+	rtnl_set_sk_err(net, RTNLGRP_NEIGH, err);
 }
 
 static void vxlan_fdb_switchdev_notifier_info(const struct vxlan_dev *vxlan,
@@ -623,9 +622,9 @@ static int vxlan_fdb_append(struct vxlan_fdb *f,
 	return 1;
 }
 
-static bool vxlan_parse_gpe_proto(struct vxlanhdr *hdr, __be16 *protocol)
+static bool vxlan_parse_gpe_proto(const struct vxlanhdr *hdr, __be16 *protocol)
 {
-	struct vxlanhdr_gpe *gpe = (struct vxlanhdr_gpe *)hdr;
+	const struct vxlanhdr_gpe *gpe = (const struct vxlanhdr_gpe *)hdr;
 
 	/* Need to have Next Protocol set for interfaces in GPE mode. */
 	if (!gpe->np_applied)
@@ -1233,10 +1232,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
 		*ifindex = 0;
 	}
 
-	if (tb[NDA_NH_ID])
-		*nhid = nla_get_u32(tb[NDA_NH_ID]);
-	else
-		*nhid = 0;
+	*nhid = nla_get_u32_default(tb[NDA_NH_ID], 0);
 
 	return 0;
 }
@@ -1245,7 +1241,7 @@ static int vxlan_fdb_parse(struct nlattr *tb[], struct vxlan_dev *vxlan,
 static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 			 struct net_device *dev,
 			 const unsigned char *addr, u16 vid, u16 flags,
-			 struct netlink_ext_ack *extack)
+			 bool *notified, struct netlink_ext_ack *extack)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	/* struct net *net = dev_net(vxlan->dev); */
@@ -1281,6 +1277,9 @@ static int vxlan_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
 			       nhid, true, extack);
 	spin_unlock_bh(&vxlan->hash_lock[hash_index]);
 
+	if (!err)
+		*notified = true;
+
 	return err;
 }
 
@@ -1320,7 +1319,7 @@ out:
 /* Delete entry (via netlink) */
 static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 			    struct net_device *dev,
-			    const unsigned char *addr, u16 vid,
+			    const unsigned char *addr, u16 vid, bool *notified,
 			    struct netlink_ext_ack *extack)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
@@ -1342,6 +1341,9 @@ static int vxlan_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
 				 true);
 	spin_unlock_bh(&vxlan->hash_lock[hash_index]);
 
+	if (!err)
+		*notified = true;
+
 	return err;
 }
 
@@ -1350,6 +1352,7 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 			  struct net_device *dev,
 			  struct net_device *filter_dev, int *idx)
 {
+	struct ndo_fdb_dump_context *ctx = (void *)cb->ctx;
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	unsigned int h;
 	int err = 0;
@@ -1362,7 +1365,7 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
 			struct vxlan_rdst *rd;
 
 			if (rcu_access_pointer(f->nh)) {
-				if (*idx < cb->args[2])
+				if (*idx < ctx->fdb_idx)
 					goto skip_nh;
 				err = vxlan_fdb_info(skb, vxlan, f,
 						     NETLINK_CB(cb->skb).portid,
@@ -1379,7 +1382,7 @@ skip_nh:
 			}
 
 			list_for_each_entry_rcu(rd, &f->remotes, list) {
-				if (*idx < cb->args[2])
+				if (*idx < ctx->fdb_idx)
 					goto skip;
 
 				err = vxlan_fdb_info(skb, vxlan, f,
@@ -1436,16 +1439,20 @@ errout:
 
 /* Watch incoming packets to learn mapping between Ethernet address
  * and Tunnel endpoint.
- * Return true if packet is bogus and should be dropped.
  */
-static bool vxlan_snoop(struct net_device *dev,
-			union vxlan_addr *src_ip, const u8 *src_mac,
-			u32 src_ifindex, __be32 vni)
+static enum skb_drop_reason vxlan_snoop(struct net_device *dev,
+					union vxlan_addr *src_ip,
+					const u8 *src_mac, u32 src_ifindex,
+					__be32 vni)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	struct vxlan_fdb *f;
 	u32 ifindex = 0;
 
+	/* Ignore packets from invalid src-address */
+	if (!is_valid_ether_addr(src_mac))
+		return SKB_DROP_REASON_MAC_INVALID_SOURCE;
+
 #if IS_ENABLED(CONFIG_IPV6)
 	if (src_ip->sa.sa_family == AF_INET6 &&
 	    (ipv6_addr_type(&src_ip->sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL))
@@ -1458,15 +1465,15 @@ static bool vxlan_snoop(struct net_device *dev,
 
 		if (likely(vxlan_addr_equal(&rdst->remote_ip, src_ip) &&
 			   rdst->remote_ifindex == ifindex))
-			return false;
+			return SKB_NOT_DROPPED_YET;
 
 		/* Don't migrate static entries, drop packets */
 		if (f->state & (NUD_PERMANENT | NUD_NOARP))
-			return true;
+			return SKB_DROP_REASON_VXLAN_ENTRY_EXISTS;
 
 		/* Don't override an fdb with nexthop with a learnt entry */
 		if (rcu_access_pointer(f->nh))
-			return true;
+			return SKB_DROP_REASON_VXLAN_ENTRY_EXISTS;
 
 		if (net_ratelimit())
 			netdev_info(dev,
@@ -1494,7 +1501,7 @@ static bool vxlan_snoop(struct net_device *dev,
 		spin_unlock(&vxlan->hash_lock[hash_index]);
 	}
 
-	return false;
+	return SKB_NOT_DROPPED_YET;
 }
 
 static bool __vxlan_sock_release_prep(struct vxlan_sock *vs)
@@ -1548,43 +1555,45 @@ static void vxlan_sock_release(struct vxlan_dev *vxlan)
 #endif
 }
 
-static bool vxlan_remcsum(struct vxlanhdr *unparsed,
-			  struct sk_buff *skb, u32 vxflags)
+static enum skb_drop_reason vxlan_remcsum(struct sk_buff *skb, u32 vxflags)
 {
+	const struct vxlanhdr *vh = vxlan_hdr(skb);
+	enum skb_drop_reason reason;
 	size_t start, offset;
 
-	if (!(unparsed->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
-		goto out;
+	if (!(vh->vx_flags & VXLAN_HF_RCO) || skb->remcsum_offload)
+		return SKB_NOT_DROPPED_YET;
 
-	start = vxlan_rco_start(unparsed->vx_vni);
-	offset = start + vxlan_rco_offset(unparsed->vx_vni);
+	start = vxlan_rco_start(vh->vx_vni);
+	offset = start + vxlan_rco_offset(vh->vx_vni);
 
-	if (!pskb_may_pull(skb, offset + sizeof(u16)))
-		return false;
+	reason = pskb_may_pull_reason(skb, offset + sizeof(u16));
+	if (reason)
+		return reason;
 
 	skb_remcsum_process(skb, (void *)(vxlan_hdr(skb) + 1), start, offset,
 			    !!(vxflags & VXLAN_F_REMCSUM_NOPARTIAL));
-out:
-	unparsed->vx_flags &= ~VXLAN_HF_RCO;
-	unparsed->vx_vni &= VXLAN_VNI_MASK;
-	return true;
+	return SKB_NOT_DROPPED_YET;
 }
 
-static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
-				struct sk_buff *skb, u32 vxflags,
+static void vxlan_parse_gbp_hdr(struct sk_buff *skb, u32 vxflags,
 				struct vxlan_metadata *md)
 {
-	struct vxlanhdr_gbp *gbp = (struct vxlanhdr_gbp *)unparsed;
+	const struct vxlanhdr *vh = vxlan_hdr(skb);
+	const struct vxlanhdr_gbp *gbp;
 	struct metadata_dst *tun_dst;
 
-	if (!(unparsed->vx_flags & VXLAN_HF_GBP))
-		goto out;
+	gbp = (const struct vxlanhdr_gbp *)vh;
+
+	if (!(vh->vx_flags & VXLAN_HF_GBP))
+		return;
 
 	md->gbp = ntohs(gbp->policy_id);
 
 	tun_dst = (struct metadata_dst *)skb_dst(skb);
 	if (tun_dst) {
-		tun_dst->u.tun_info.key.tun_flags |= TUNNEL_VXLAN_OPT;
+		__set_bit(IP_TUNNEL_VXLAN_OPT_BIT,
+			  tun_dst->u.tun_info.key.tun_flags);
 		tun_dst->u.tun_info.options_len = sizeof(*md);
 	}
 	if (gbp->dont_learn)
@@ -1596,13 +1605,11 @@ static void vxlan_parse_gbp_hdr(struct vxlanhdr *unparsed,
 	/* In flow-based mode, GBP is carried in dst_metadata */
 	if (!(vxflags & VXLAN_F_COLLECT_METADATA))
 		skb->mark = md->gbp;
-out:
-	unparsed->vx_flags &= ~VXLAN_GBP_USED_BITS;
 }
 
-static bool vxlan_set_mac(struct vxlan_dev *vxlan,
-			  struct vxlan_sock *vs,
-			  struct sk_buff *skb, __be32 vni)
+static enum skb_drop_reason vxlan_set_mac(struct vxlan_dev *vxlan,
+					  struct vxlan_sock *vs,
+					  struct sk_buff *skb, __be32 vni)
 {
 	union vxlan_addr saddr;
 	u32 ifindex = skb->dev->ifindex;
@@ -1613,7 +1620,7 @@ static bool vxlan_set_mac(struct vxlan_dev *vxlan,
 
 	/* Ignore packet loops (and multicast echo) */
 	if (ether_addr_equal(eth_hdr(skb)->h_source, vxlan->dev->dev_addr))
-		return false;
+		return SKB_DROP_REASON_LOCAL_MAC;
 
 	/* Get address from the outer IP header */
 	if (vxlan_get_sk_family(vs) == AF_INET) {
@@ -1626,11 +1633,11 @@ static bool vxlan_set_mac(struct vxlan_dev *vxlan,
 #endif
 	}
 
-	if ((vxlan->cfg.flags & VXLAN_F_LEARN) &&
-	    vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source, ifindex, vni))
-		return false;
+	if (!(vxlan->cfg.flags & VXLAN_F_LEARN))
+		return SKB_NOT_DROPPED_YET;
 
-	return true;
+	return vxlan_snoop(skb->dev, &saddr, eth_hdr(skb)->h_source,
+			   ifindex, vni);
 }
 
 static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
@@ -1661,68 +1668,93 @@ static bool vxlan_ecn_decapsulate(struct vxlan_sock *vs, void *oiph,
 static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 {
 	struct vxlan_vni_node *vninode = NULL;
+	const struct vxlanhdr *vh;
 	struct vxlan_dev *vxlan;
 	struct vxlan_sock *vs;
-	struct vxlanhdr unparsed;
 	struct vxlan_metadata _md;
 	struct vxlan_metadata *md = &_md;
 	__be16 protocol = htons(ETH_P_TEB);
+	enum skb_drop_reason reason;
 	bool raw_proto = false;
 	void *oiph;
 	__be32 vni = 0;
+	int nh;
 
 	/* Need UDP and VXLAN header to be present */
-	if (!pskb_may_pull(skb, VXLAN_HLEN))
+	reason = pskb_may_pull_reason(skb, VXLAN_HLEN);
+	if (reason)
 		goto drop;
 
-	unparsed = *vxlan_hdr(skb);
+	vh = vxlan_hdr(skb);
 	/* VNI flag always required to be set */
-	if (!(unparsed.vx_flags & VXLAN_HF_VNI)) {
+	if (!(vh->vx_flags & VXLAN_HF_VNI)) {
 		netdev_dbg(skb->dev, "invalid vxlan flags=%#x vni=%#x\n",
-			   ntohl(vxlan_hdr(skb)->vx_flags),
-			   ntohl(vxlan_hdr(skb)->vx_vni));
+			   ntohl(vh->vx_flags), ntohl(vh->vx_vni));
+		reason = SKB_DROP_REASON_VXLAN_INVALID_HDR;
 		/* Return non vxlan pkt */
 		goto drop;
 	}
-	unparsed.vx_flags &= ~VXLAN_HF_VNI;
-	unparsed.vx_vni &= ~VXLAN_VNI_MASK;
 
 	vs = rcu_dereference_sk_user_data(sk);
 	if (!vs)
 		goto drop;
 
-	vni = vxlan_vni(vxlan_hdr(skb)->vx_vni);
+	vni = vxlan_vni(vh->vx_vni);
 
 	vxlan = vxlan_vs_find_vni(vs, skb->dev->ifindex, vni, &vninode);
-	if (!vxlan)
+	if (!vxlan) {
+		reason = SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND;
 		goto drop;
+	}
 
-	/* For backwards compatibility, only allow reserved fields to be
-	 * used by VXLAN extensions if explicitly requested.
-	 */
-	if (vs->flags & VXLAN_F_GPE) {
-		if (!vxlan_parse_gpe_proto(&unparsed, &protocol))
+	if (vh->vx_flags & vxlan->cfg.reserved_bits.vx_flags ||
+	    vh->vx_vni & vxlan->cfg.reserved_bits.vx_vni) {
+		/* If the header uses bits besides those enabled by the
+		 * netdevice configuration, treat this as a malformed packet.
+		 * This behavior diverges from VXLAN RFC (RFC7348) which
+		 * stipulates that bits in reserved in reserved fields are to be
+		 * ignored. The approach here maintains compatibility with
+		 * previous stack code, and also is more robust and provides a
+		 * little more security in adding extensions to VXLAN.
+		 */
+		reason = SKB_DROP_REASON_VXLAN_INVALID_HDR;
+		DEV_STATS_INC(vxlan->dev, rx_frame_errors);
+		DEV_STATS_INC(vxlan->dev, rx_errors);
+		vxlan_vnifilter_count(vxlan, vni, vninode,
+				      VXLAN_VNI_STATS_RX_ERRORS, 0);
+		goto drop;
+	}
+
+	if (vxlan->cfg.flags & VXLAN_F_GPE) {
+		if (!vxlan_parse_gpe_proto(vh, &protocol))
 			goto drop;
-		unparsed.vx_flags &= ~VXLAN_GPE_USED_BITS;
 		raw_proto = true;
 	}
 
 	if (__iptunnel_pull_header(skb, VXLAN_HLEN, protocol, raw_proto,
-				   !net_eq(vxlan->net, dev_net(vxlan->dev))))
+				   !net_eq(vxlan->net, dev_net(vxlan->dev)))) {
+		reason = SKB_DROP_REASON_NOMEM;
 		goto drop;
+	}
 
-	if (vs->flags & VXLAN_F_REMCSUM_RX)
-		if (unlikely(!vxlan_remcsum(&unparsed, skb, vs->flags)))
+	if (vxlan->cfg.flags & VXLAN_F_REMCSUM_RX) {
+		reason = vxlan_remcsum(skb, vxlan->cfg.flags);
+		if (unlikely(reason))
 			goto drop;
+	}
 
 	if (vxlan_collect_metadata(vs)) {
+		IP_TUNNEL_DECLARE_FLAGS(flags) = { };
 		struct metadata_dst *tun_dst;
 
-		tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), TUNNEL_KEY,
+		__set_bit(IP_TUNNEL_KEY_BIT, flags);
+		tun_dst = udp_tun_rx_dst(skb, vxlan_get_sk_family(vs), flags,
 					 key32_to_tunnel_id(vni), sizeof(*md));
 
-		if (!tun_dst)
+		if (!tun_dst) {
+			reason = SKB_DROP_REASON_NOMEM;
 			goto drop;
+		}
 
 		md = ip_tunnel_info_opts(&tun_dst->u.tun_info);
 
@@ -1731,26 +1763,15 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 		memset(md, 0, sizeof(*md));
 	}
 
-	if (vs->flags & VXLAN_F_GBP)
-		vxlan_parse_gbp_hdr(&unparsed, skb, vs->flags, md);
+	if (vxlan->cfg.flags & VXLAN_F_GBP)
+		vxlan_parse_gbp_hdr(skb, vxlan->cfg.flags, md);
 	/* Note that GBP and GPE can never be active together. This is
 	 * ensured in vxlan_dev_configure.
 	 */
 
-	if (unparsed.vx_flags || unparsed.vx_vni) {
-		/* If there are any unprocessed flags remaining treat
-		 * this as a malformed packet. This behavior diverges from
-		 * VXLAN RFC (RFC7348) which stipulates that bits in reserved
-		 * in reserved fields are to be ignored. The approach here
-		 * maintains compatibility with previous stack code, and also
-		 * is more robust and provides a little more security in
-		 * adding extensions to VXLAN.
-		 */
-		goto drop;
-	}
-
 	if (!raw_proto) {
-		if (!vxlan_set_mac(vxlan, vs, skb, vni))
+		reason = vxlan_set_mac(vxlan, vs, skb, vni);
+		if (reason)
 			goto drop;
 	} else {
 		skb_reset_mac_header(skb);
@@ -1758,12 +1779,30 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 		skb->pkt_type = PACKET_HOST;
 	}
 
-	oiph = skb_network_header(skb);
+	/* Save offset of outer header relative to skb->head,
+	 * because we are going to reset the network header to the inner header
+	 * and might change skb->head.
+	 */
+	nh = skb_network_header(skb) - skb->head;
+
 	skb_reset_network_header(skb);
 
+	reason = pskb_inet_may_pull_reason(skb);
+	if (reason) {
+		DEV_STATS_INC(vxlan->dev, rx_length_errors);
+		DEV_STATS_INC(vxlan->dev, rx_errors);
+		vxlan_vnifilter_count(vxlan, vni, vninode,
+				      VXLAN_VNI_STATS_RX_ERRORS, 0);
+		goto drop;
+	}
+
+	/* Get the outer header. */
+	oiph = skb->head + nh;
+
 	if (!vxlan_ecn_decapsulate(vs, oiph, skb)) {
-		++vxlan->dev->stats.rx_frame_errors;
-		++vxlan->dev->stats.rx_errors;
+		reason = SKB_DROP_REASON_IP_TUNNEL_ECN;
+		DEV_STATS_INC(vxlan->dev, rx_frame_errors);
+		DEV_STATS_INC(vxlan->dev, rx_errors);
 		vxlan_vnifilter_count(vxlan, vni, vninode,
 				      VXLAN_VNI_STATS_RX_ERRORS, 0);
 		goto drop;
@@ -1773,13 +1812,14 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 
 	if (unlikely(!(vxlan->dev->flags & IFF_UP))) {
 		rcu_read_unlock();
-		dev_core_stats_rx_dropped_inc(vxlan->dev);
+		dev_dstats_rx_dropped(vxlan->dev);
 		vxlan_vnifilter_count(vxlan, vni, vninode,
 				      VXLAN_VNI_STATS_RX_DROPS, 0);
+		reason = SKB_DROP_REASON_DEV_READY;
 		goto drop;
 	}
 
-	dev_sw_netstats_rx_add(vxlan->dev, skb->len);
+	dev_dstats_rx_add(vxlan->dev, skb->len);
 	vxlan_vnifilter_count(vxlan, vni, vninode, VXLAN_VNI_STATS_RX, skb->len);
 	gro_cells_receive(&vxlan->gro_cells, skb);
 
@@ -1788,8 +1828,9 @@ static int vxlan_rcv(struct sock *sk, struct sk_buff *skb)
 	return 0;
 
 drop:
+	reason = reason ?: SKB_DROP_REASON_NOT_SPECIFIED;
 	/* Consume bad packet */
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return 0;
 }
 
@@ -1833,7 +1874,9 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 		goto out;
 
 	if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
-		dev->stats.tx_dropped++;
+		dev_dstats_tx_dropped(dev);
+		vxlan_vnifilter_count(vxlan, vni, NULL,
+				      VXLAN_VNI_STATS_TX_DROPS, 0);
 		goto out;
 	}
 	parp = arp_hdr(skb);
@@ -1889,7 +1932,7 @@ static int arp_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 		reply->pkt_type = PACKET_HOST;
 
 		if (netif_rx(reply) == NET_RX_DROP) {
-			dev->stats.rx_dropped++;
+			dev_dstats_rx_dropped(dev);
 			vxlan_vnifilter_count(vxlan, vni, NULL,
 					      VXLAN_VNI_STATS_RX_DROPS, 0);
 		}
@@ -2048,7 +2091,7 @@ static int neigh_reduce(struct net_device *dev, struct sk_buff *skb, __be32 vni)
 			goto out;
 
 		if (netif_rx(reply) == NET_RX_DROP) {
-			dev->stats.rx_dropped++;
+			dev_dstats_rx_dropped(dev);
 			vxlan_vnifilter_count(vxlan, vni, NULL,
 					      VXLAN_VNI_STATS_RX_DROPS, 0);
 		}
@@ -2222,8 +2265,8 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
 {
 	union vxlan_addr loopback;
 	union vxlan_addr *remote_ip = &dst_vxlan->default_dst.remote_ip;
+	unsigned int len = skb->len;
 	struct net_device *dev;
-	int len = skb->len;
 
 	skb->pkt_type = PACKET_HOST;
 	skb->encapsulation = 0;
@@ -2243,23 +2286,23 @@ static void vxlan_encap_bypass(struct sk_buff *skb, struct vxlan_dev *src_vxlan,
 	rcu_read_lock();
 	dev = skb->dev;
 	if (unlikely(!(dev->flags & IFF_UP))) {
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_DEV_READY);
 		goto drop;
 	}
 
 	if ((dst_vxlan->cfg.flags & VXLAN_F_LEARN) && snoop)
 		vxlan_snoop(dev, &loopback, eth_hdr(skb)->h_source, 0, vni);
 
-	dev_sw_netstats_tx_add(src_vxlan->dev, 1, len);
+	dev_dstats_tx_add(src_vxlan->dev, len);
 	vxlan_vnifilter_count(src_vxlan, vni, NULL, VXLAN_VNI_STATS_TX, len);
 
 	if (__netif_rx(skb) == NET_RX_SUCCESS) {
-		dev_sw_netstats_rx_add(dst_vxlan->dev, len);
+		dev_dstats_rx_add(dst_vxlan->dev, len);
 		vxlan_vnifilter_count(dst_vxlan, vni, NULL, VXLAN_VNI_STATS_RX,
 				      len);
 	} else {
 drop:
-		dev->stats.rx_dropped++;
+		dev_dstats_rx_dropped(dev);
 		vxlan_vnifilter_count(dst_vxlan, vni, NULL,
 				      VXLAN_VNI_STATS_RX_DROPS, 0);
 	}
@@ -2291,10 +2334,10 @@ static int encap_bypass_if_local(struct sk_buff *skb, struct net_device *dev,
 					   addr_family, dst_port,
 					   vxlan->cfg.flags);
 		if (!dst_vxlan) {
-			dev->stats.tx_errors++;
+			DEV_STATS_INC(dev, tx_errors);
 			vxlan_vnifilter_count(vxlan, vni, NULL,
 					      VXLAN_VNI_STATS_TX_ERRORS, 0);
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND);
 
 			return -ENOENT;
 		}
@@ -2313,7 +2356,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 	struct ip_tunnel_key *pkey;
 	struct ip_tunnel_key key;
 	struct vxlan_dev *vxlan = netdev_priv(dev);
-	const struct iphdr *old_iph = ip_hdr(skb);
+	const struct iphdr *old_iph;
 	struct vxlan_metadata _md;
 	struct vxlan_metadata *md = &_md;
 	unsigned int pkt_len = skb->len;
@@ -2327,8 +2370,18 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 	bool use_cache;
 	bool udp_sum = false;
 	bool xnet = !net_eq(vxlan->net, dev_net(vxlan->dev));
+	enum skb_drop_reason reason;
+	bool no_eth_encap;
 	__be32 vni = 0;
 
+	no_eth_encap = flags & VXLAN_F_GPE && skb->protocol != htons(ETH_P_TEB);
+	reason = skb_vlan_inet_prepare(skb, no_eth_encap);
+	if (reason)
+		goto drop;
+
+	reason = SKB_DROP_REASON_NOT_SPECIFIED;
+	old_iph = ip_hdr(skb);
+
 	info = skb_tunnel_info(skb);
 	use_cache = ip_tunnel_dst_cache_usable(skb, info);
 
@@ -2403,14 +2456,14 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 		vni = tunnel_id_to_key32(info->key.tun_id);
 		ifindex = 0;
 		dst_cache = &info->dst_cache;
-		if (info->key.tun_flags & TUNNEL_VXLAN_OPT) {
+		if (test_bit(IP_TUNNEL_VXLAN_OPT_BIT, info->key.tun_flags)) {
 			if (info->options_len < sizeof(*md))
 				goto drop;
 			md = ip_tunnel_info_opts(info);
 		}
 		ttl = info->key.ttl;
 		tos = info->key.tos;
-		udp_sum = !!(info->key.tun_flags & TUNNEL_CSUM);
+		udp_sum = test_bit(IP_TUNNEL_CSUM_BIT, info->key.tun_flags);
 	}
 	src_port = udp_flow_src_port(dev_net(dev), skb, vxlan->cfg.port_min,
 				     vxlan->cfg.port_max, true);
@@ -2430,6 +2483,7 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 					   tos, use_cache ? dst_cache : NULL);
 		if (IS_ERR(rt)) {
 			err = PTR_ERR(rt);
+			reason = SKB_DROP_REASON_IP_OUTNOROUTES;
 			goto tx_error;
 		}
 
@@ -2451,7 +2505,8 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 				     old_iph->frag_off & htons(IP_DF)))
 					df = htons(IP_DF);
 			}
-		} else if (info->key.tun_flags & TUNNEL_DONT_FRAGMENT) {
+		} else if (test_bit(IP_TUNNEL_DONT_FRAGMENT_BIT,
+				    info->key.tun_flags)) {
 			df = htons(IP_DF);
 		}
 
@@ -2480,8 +2535,10 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 		ttl = ttl ? : ip4_dst_hoplimit(&rt->dst);
 		err = vxlan_build_skb(skb, ndst, sizeof(struct iphdr),
 				      vni, md, flags, udp_sum);
-		if (err < 0)
+		if (err < 0) {
+			reason = SKB_DROP_REASON_NOMEM;
 			goto tx_error;
+		}
 
 		udp_tunnel_xmit_skb(rt, sock4->sock->sk, skb, saddr,
 				    pkey->u.ipv4.dst, tos, ttl, df,
@@ -2501,11 +2558,12 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 		if (IS_ERR(ndst)) {
 			err = PTR_ERR(ndst);
 			ndst = NULL;
+			reason = SKB_DROP_REASON_IP_OUTNOROUTES;
 			goto tx_error;
 		}
 
 		if (!info) {
-			u32 rt6i_flags = ((struct rt6_info *)ndst)->rt6i_flags;
+			u32 rt6i_flags = dst_rt6_info(ndst)->rt6i_flags;
 
 			err = encap_bypass_if_local(skb, dev, vxlan, AF_INET6,
 						    dst_port, ifindex, vni,
@@ -2541,8 +2599,10 @@ void vxlan_xmit_one(struct sk_buff *skb, struct net_device *dev,
 		skb_scrub_packet(skb, xnet);
 		err = vxlan_build_skb(skb, ndst, sizeof(struct ipv6hdr),
 				      vni, md, flags, udp_sum);
-		if (err < 0)
+		if (err < 0) {
+			reason = SKB_DROP_REASON_NOMEM;
 			goto tx_error;
+		}
 
 		udp_tunnel6_xmit_skb(ndst, sock6->sock->sk, skb, dev,
 				     &saddr, &pkey->u.ipv6.dst, tos, ttl,
@@ -2555,21 +2615,21 @@ out_unlock:
 	return;
 
 drop:
-	dev->stats.tx_dropped++;
+	dev_dstats_tx_dropped(dev);
 	vxlan_vnifilter_count(vxlan, vni, NULL, VXLAN_VNI_STATS_TX_DROPS, 0);
-	dev_kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 	return;
 
 tx_error:
 	rcu_read_unlock();
 	if (err == -ELOOP)
-		dev->stats.collisions++;
+		DEV_STATS_INC(dev, collisions);
 	else if (err == -ENETUNREACH)
-		dev->stats.tx_carrier_errors++;
+		DEV_STATS_INC(dev, tx_carrier_errors);
 	dst_release(ndst);
-	dev->stats.tx_errors++;
+	DEV_STATS_INC(dev, tx_errors);
 	vxlan_vnifilter_count(vxlan, vni, NULL, VXLAN_VNI_STATS_TX_ERRORS, 0);
-	kfree_skb(skb);
+	kfree_skb_reason(skb, reason);
 }
 
 static void vxlan_xmit_nh(struct sk_buff *skb, struct net_device *dev,
@@ -2600,7 +2660,7 @@ static void vxlan_xmit_nh(struct sk_buff *skb, struct net_device *dev,
 	return;
 
 drop:
-	dev->stats.tx_dropped++;
+	dev_dstats_tx_dropped(dev);
 	vxlan_vnifilter_count(netdev_priv(dev), vni, NULL,
 			      VXLAN_VNI_STATS_TX_DROPS, 0);
 	dev_kfree_skb(skb);
@@ -2638,7 +2698,7 @@ static netdev_tx_t vxlan_xmit_nhid(struct sk_buff *skb, struct net_device *dev,
 	return NETDEV_TX_OK;
 
 drop:
-	dev->stats.tx_dropped++;
+	dev_dstats_tx_dropped(dev);
 	vxlan_vnifilter_count(netdev_priv(dev), vni, NULL,
 			      VXLAN_VNI_STATS_TX_DROPS, 0);
 	dev_kfree_skb(skb);
@@ -2656,11 +2716,11 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	struct vxlan_rdst *rdst, *fdst = NULL;
 	const struct ip_tunnel_info *info;
-	bool did_rsc = false;
 	struct vxlan_fdb *f;
 	struct ethhdr *eth;
 	__be32 vni = 0;
 	u32 nhid = 0;
+	bool did_rsc;
 
 	info = skb_tunnel_info(skb);
 
@@ -2675,7 +2735,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 			if (info && info->mode & IP_TUNNEL_INFO_TX)
 				vxlan_xmit_one(skb, dev, vni, NULL, false);
 			else
-				kfree_skb(skb);
+				kfree_skb_reason(skb, SKB_DROP_REASON_TUNNEL_TXINFO);
 			return NETDEV_TX_OK;
 		}
 	}
@@ -2735,10 +2795,10 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 			    !is_multicast_ether_addr(eth->h_dest))
 				vxlan_fdb_miss(vxlan, eth->h_dest);
 
-			dev->stats.tx_dropped++;
+			dev_dstats_tx_dropped(dev);
 			vxlan_vnifilter_count(vxlan, vni, NULL,
 					      VXLAN_VNI_STATS_TX_DROPS, 0);
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_NO_TX_TARGET);
 			return NETDEV_TX_OK;
 		}
 	}
@@ -2761,7 +2821,7 @@ static netdev_tx_t vxlan_xmit(struct sk_buff *skb, struct net_device *dev)
 		if (fdst)
 			vxlan_xmit_one(skb, dev, vni, fdst, did_rsc);
 		else
-			kfree_skb(skb);
+			kfree_skb_reason(skb, SKB_DROP_REASON_NO_TX_TARGET);
 	}
 
 	return NETDEV_TX_OK;
@@ -2838,29 +2898,25 @@ static int vxlan_init(struct net_device *dev)
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	int err;
 
-	if (vxlan->cfg.flags & VXLAN_F_VNIFILTER)
-		vxlan_vnigroup_init(vxlan);
-
-	dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
-	if (!dev->tstats) {
-		err = -ENOMEM;
-		goto err_vnigroup_uninit;
+	if (vxlan->cfg.flags & VXLAN_F_VNIFILTER) {
+		err = vxlan_vnigroup_init(vxlan);
+		if (err)
+			return err;
 	}
 
 	err = gro_cells_init(&vxlan->gro_cells, dev);
 	if (err)
-		goto err_free_percpu;
+		goto err_vnigroup_uninit;
 
 	err = vxlan_mdb_init(vxlan);
 	if (err)
 		goto err_gro_cells_destroy;
 
+	netdev_lockdep_set_classes(dev);
 	return 0;
 
 err_gro_cells_destroy:
 	gro_cells_destroy(&vxlan->gro_cells);
-err_free_percpu:
-	free_percpu(dev->tstats);
 err_vnigroup_uninit:
 	if (vxlan->cfg.flags & VXLAN_F_VNIFILTER)
 		vxlan_vnigroup_uninit(vxlan);
@@ -2891,8 +2947,6 @@ static void vxlan_uninit(struct net_device *dev)
 	gro_cells_destroy(&vxlan->gro_cells);
 
 	vxlan_fdb_delete_default(vxlan, vxlan->cfg.vni);
-
-	free_percpu(dev->tstats);
 }
 
 /* Start ageing timer and join group when device is brought up */
@@ -3163,7 +3217,7 @@ static int vxlan_change_mtu(struct net_device *dev, int new_mtu)
 			return -EINVAL;
 	}
 
-	dev->mtu = new_mtu;
+	WRITE_ONCE(dev->mtu, new_mtu);
 	return 0;
 }
 
@@ -3223,7 +3277,6 @@ static const struct net_device_ops vxlan_netdev_ether_ops = {
 	.ndo_open		= vxlan_open,
 	.ndo_stop		= vxlan_stop,
 	.ndo_start_xmit		= vxlan_xmit,
-	.ndo_get_stats64	= dev_get_tstats64,
 	.ndo_set_rx_mode	= vxlan_set_multicast_list,
 	.ndo_change_mtu		= vxlan_change_mtu,
 	.ndo_validate_addr	= eth_validate_addr,
@@ -3247,13 +3300,12 @@ static const struct net_device_ops vxlan_netdev_raw_ops = {
 	.ndo_open		= vxlan_open,
 	.ndo_stop		= vxlan_stop,
 	.ndo_start_xmit		= vxlan_xmit,
-	.ndo_get_stats64	= dev_get_tstats64,
 	.ndo_change_mtu		= vxlan_change_mtu,
 	.ndo_fill_metadata_dst	= vxlan_fill_metadata_dst,
 };
 
 /* Info for udev, that this is a virtual tunnel endpoint */
-static struct device_type vxlan_type = {
+static const struct device_type vxlan_type = {
 	.name = "vxlan",
 };
 
@@ -3299,7 +3351,6 @@ static void vxlan_setup(struct net_device *dev)
 	dev->needs_free_netdev = true;
 	SET_NETDEV_DEVTYPE(dev, &vxlan_type);
 
-	dev->features	|= NETIF_F_LLTX;
 	dev->features	|= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_FRAGLIST;
 	dev->features   |= NETIF_F_RXCSUM;
 	dev->features   |= NETIF_F_GSO_SOFTWARE;
@@ -3309,12 +3360,15 @@ static void vxlan_setup(struct net_device *dev)
 	dev->hw_features |= NETIF_F_RXCSUM;
 	dev->hw_features |= NETIF_F_GSO_SOFTWARE;
 	netif_keep_dst(dev);
-	dev->priv_flags |= IFF_NO_QUEUE | IFF_CHANGE_PROTO_DOWN;
+	dev->priv_flags |= IFF_NO_QUEUE;
+	dev->change_proto_down = true;
+	dev->lltx = true;
 
 	/* MTU range: 68 - 65535 */
 	dev->min_mtu = ETH_MIN_MTU;
 	dev->max_mtu = ETH_MAX_MTU;
 
+	dev->pcpu_stat_type = NETDEV_PCPU_STAT_DSTATS;
 	INIT_LIST_HEAD(&vxlan->next);
 
 	timer_setup(&vxlan->age_timer, vxlan_cleanup, TIMER_DEFERRABLE);
@@ -3378,6 +3432,7 @@ static const struct nla_policy vxlan_policy[IFLA_VXLAN_MAX + 1] = {
 	[IFLA_VXLAN_VNIFILTER]	= { .type = NLA_U8 },
 	[IFLA_VXLAN_LOCALBYPASS]	= NLA_POLICY_MAX(NLA_U8, 1),
 	[IFLA_VXLAN_LABEL_POLICY]       = NLA_POLICY_MAX(NLA_U32, VXLAN_LABEL_MAX),
+	[IFLA_VXLAN_RESERVED_BITS] = NLA_POLICY_EXACT_LEN(sizeof(struct vxlanhdr)),
 };
 
 static int vxlan_validate(struct nlattr *tb[], struct nlattr *data[],
@@ -4013,6 +4068,10 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
 			 struct net_device *dev, struct vxlan_config *conf,
 			 bool changelink, struct netlink_ext_ack *extack)
 {
+	struct vxlanhdr used_bits = {
+		.vx_flags = VXLAN_HF_VNI,
+		.vx_vni = VXLAN_VNI_MASK,
+	};
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 	int err = 0;
 
@@ -4239,6 +4298,8 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
 				    extack);
 		if (err)
 			return err;
+		used_bits.vx_flags |= VXLAN_HF_RCO;
+		used_bits.vx_vni |= ~VXLAN_VNI_MASK;
 	}
 
 	if (data[IFLA_VXLAN_GBP]) {
@@ -4246,6 +4307,7 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
 				    VXLAN_F_GBP, changelink, false, extack);
 		if (err)
 			return err;
+		used_bits.vx_flags |= VXLAN_GBP_USED_BITS;
 	}
 
 	if (data[IFLA_VXLAN_GPE]) {
@@ -4254,6 +4316,46 @@ static int vxlan_nl2conf(struct nlattr *tb[], struct nlattr *data[],
 				    extack);
 		if (err)
 			return err;
+
+		used_bits.vx_flags |= VXLAN_GPE_USED_BITS;
+	}
+
+	if (data[IFLA_VXLAN_RESERVED_BITS]) {
+		struct vxlanhdr reserved_bits;
+
+		if (changelink) {
+			NL_SET_ERR_MSG_ATTR(extack,
+					    data[IFLA_VXLAN_RESERVED_BITS],
+					    "Cannot change reserved_bits");
+			return -EOPNOTSUPP;
+		}
+
+		nla_memcpy(&reserved_bits, data[IFLA_VXLAN_RESERVED_BITS],
+			   sizeof(reserved_bits));
+		if (used_bits.vx_flags & reserved_bits.vx_flags ||
+		    used_bits.vx_vni & reserved_bits.vx_vni) {
+			__be64 ub_be64, rb_be64;
+
+			memcpy(&ub_be64, &used_bits, sizeof(ub_be64));
+			memcpy(&rb_be64, &reserved_bits, sizeof(rb_be64));
+
+			NL_SET_ERR_MSG_ATTR_FMT(extack,
+						data[IFLA_VXLAN_RESERVED_BITS],
+						"Used bits %#018llx cannot overlap reserved bits %#018llx",
+						be64_to_cpu(ub_be64),
+						be64_to_cpu(rb_be64));
+			return -EINVAL;
+		}
+
+		conf->reserved_bits = reserved_bits;
+	} else {
+		/* For backwards compatibility, only allow reserved fields to be
+		 * used by VXLAN extensions if explicitly requested.
+		 */
+		conf->reserved_bits = (struct vxlanhdr) {
+			.vx_flags = ~used_bits.vx_flags,
+			.vx_vni = ~used_bits.vx_vni,
+		};
 	}
 
 	if (data[IFLA_VXLAN_REMCSUM_NOPARTIAL]) {
@@ -4440,6 +4542,8 @@ static size_t vxlan_get_size(const struct net_device *dev)
 		nla_total_size(0) + /* IFLA_VXLAN_GPE */
 		nla_total_size(0) + /* IFLA_VXLAN_REMCSUM_NOPARTIAL */
 		nla_total_size(sizeof(__u8)) + /* IFLA_VXLAN_VNIFILTER */
+		/* IFLA_VXLAN_RESERVED_BITS */
+		nla_total_size(sizeof(struct vxlanhdr)) +
 		0;
 }
 
@@ -4542,6 +4646,11 @@ static int vxlan_fill_info(struct sk_buff *skb, const struct net_device *dev)
 		       !!(vxlan->cfg.flags & VXLAN_F_VNIFILTER)))
 		goto nla_put_failure;
 
+	if (nla_put(skb, IFLA_VXLAN_RESERVED_BITS,
+		    sizeof(vxlan->cfg.reserved_bits),
+		    &vxlan->cfg.reserved_bits))
+		goto nla_put_failure;
+
 	return 0;
 
 nla_put_failure:
@@ -4552,7 +4661,7 @@ static struct net *vxlan_get_link_net(const struct net_device *dev)
 {
 	struct vxlan_dev *vxlan = netdev_priv(dev);
 
-	return vxlan->net;
+	return READ_ONCE(vxlan->net);
 }
 
 static struct rtnl_link_ops vxlan_link_ops __read_mostly = {
@@ -4826,55 +4935,43 @@ static __net_init int vxlan_init_net(struct net *net)
 					 NULL);
 }
 
-static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
+static void __net_exit vxlan_destroy_tunnels(struct vxlan_net *vn,
+					     struct list_head *dev_to_kill)
 {
-	struct vxlan_net *vn = net_generic(net, vxlan_net_id);
 	struct vxlan_dev *vxlan, *next;
-	struct net_device *dev, *aux;
-
-	for_each_netdev_safe(net, dev, aux)
-		if (dev->rtnl_link_ops == &vxlan_link_ops)
-			unregister_netdevice_queue(dev, head);
-
-	list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
-		/* If vxlan->dev is in the same netns, it has already been added
-		 * to the list by the previous loop.
-		 */
-		if (!net_eq(dev_net(vxlan->dev), net))
-			unregister_netdevice_queue(vxlan->dev, head);
-	}
 
+	list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next)
+		vxlan_dellink(vxlan->dev, dev_to_kill);
 }
 
-static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
+static void __net_exit vxlan_exit_batch_rtnl(struct list_head *net_list,
+					     struct list_head *dev_to_kill)
 {
 	struct net *net;
-	LIST_HEAD(list);
-	unsigned int h;
 
+	ASSERT_RTNL();
 	list_for_each_entry(net, net_list, exit_list) {
 		struct vxlan_net *vn = net_generic(net, vxlan_net_id);
 
-		unregister_nexthop_notifier(net, &vn->nexthop_notifier_block);
-	}
-	rtnl_lock();
-	list_for_each_entry(net, net_list, exit_list)
-		vxlan_destroy_tunnels(net, &list);
+		__unregister_nexthop_notifier(net, &vn->nexthop_notifier_block);
 
-	unregister_netdevice_many(&list);
-	rtnl_unlock();
+		vxlan_destroy_tunnels(vn, dev_to_kill);
+	}
+}
 
-	list_for_each_entry(net, net_list, exit_list) {
-		struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+static void __net_exit vxlan_exit_net(struct net *net)
+{
+	struct vxlan_net *vn = net_generic(net, vxlan_net_id);
+	unsigned int h;
 
-		for (h = 0; h < PORT_HASH_SIZE; ++h)
-			WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
-	}
+	for (h = 0; h < PORT_HASH_SIZE; ++h)
+		WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
 }
 
 static struct pernet_operations vxlan_net_ops = {
 	.init = vxlan_init_net,
-	.exit_batch = vxlan_exit_batch_net,
+	.exit_batch_rtnl = vxlan_exit_batch_rtnl,
+	.exit = vxlan_exit_net,
 	.id   = &vxlan_net_id,
 	.size = sizeof(struct vxlan_net),
 };
@@ -4901,9 +4998,13 @@ static int __init vxlan_init_module(void)
 	if (rc)
 		goto out4;
 
-	vxlan_vnifilter_init();
+	rc = vxlan_vnifilter_init();
+	if (rc)
+		goto out5;
 
 	return 0;
+out5:
+	rtnl_link_unregister(&vxlan_link_ops);
 out4:
 	unregister_switchdev_notifier(&vxlan_switchdev_notifier_block);
 out3:
diff --git a/drivers/net/vxlan/vxlan_mdb.c b/drivers/net/vxlan/vxlan_mdb.c
index 60eb95a06d55..816ab1aa0526 100644
--- a/drivers/net/vxlan/vxlan_mdb.c
+++ b/drivers/net/vxlan/vxlan_mdb.c
@@ -284,7 +284,7 @@ int vxlan_mdb_dump(struct net_device *dev, struct sk_buff *skb,
 
 	ASSERT_RTNL();
 
-	NL_ASSERT_DUMP_CTX_FITS(struct vxlan_mdb_dump_ctx);
+	NL_ASSERT_CTX_FITS(struct vxlan_mdb_dump_ctx);
 
 	nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
 			cb->nlh->nlmsg_seq, RTM_NEWMDB, sizeof(*bpm),
@@ -1712,7 +1712,7 @@ netdev_tx_t vxlan_mdb_xmit(struct vxlan_dev *vxlan,
 		vxlan_xmit_one(skb, vxlan->dev, src_vni,
 			       rcu_dereference(fremote->rd), false);
 	else
-		kfree_skb(skb);
+		kfree_skb_reason(skb, SKB_DROP_REASON_NO_TX_TARGET);
 
 	return NETDEV_TX_OK;
 }
diff --git a/drivers/net/vxlan/vxlan_private.h b/drivers/net/vxlan/vxlan_private.h
index b35d96b78843..76a351a997d5 100644
--- a/drivers/net/vxlan/vxlan_private.h
+++ b/drivers/net/vxlan/vxlan_private.h
@@ -202,7 +202,7 @@ int vxlan_vni_in_use(struct net *src_net, struct vxlan_dev *vxlan,
 int vxlan_vnigroup_init(struct vxlan_dev *vxlan);
 void vxlan_vnigroup_uninit(struct vxlan_dev *vxlan);
 
-void vxlan_vnifilter_init(void);
+int vxlan_vnifilter_init(void);
 void vxlan_vnifilter_uninit(void);
 void vxlan_vnifilter_count(struct vxlan_dev *vxlan, __be32 vni,
 			   struct vxlan_vni_node *vninode,
diff --git a/drivers/net/vxlan/vxlan_vnifilter.c b/drivers/net/vxlan/vxlan_vnifilter.c
index 9c59d0bf8c3d..6e6e9f05509a 100644
--- a/drivers/net/vxlan/vxlan_vnifilter.c
+++ b/drivers/net/vxlan/vxlan_vnifilter.c
@@ -411,6 +411,11 @@ static int vxlan_vnifilter_dump(struct sk_buff *skb, struct netlink_callback *cb
 	struct tunnel_msg *tmsg;
 	struct net_device *dev;
 
+	if (cb->nlh->nlmsg_len < nlmsg_msg_size(sizeof(struct tunnel_msg))) {
+		NL_SET_ERR_MSG(cb->extack, "Invalid msg length");
+		return -EINVAL;
+	}
+
 	tmsg = nlmsg_data(cb->nlh);
 
 	if (tmsg->flags & ~TUNNEL_MSG_VALID_USER_FLAGS) {
@@ -992,19 +997,18 @@ static int vxlan_vnifilter_process(struct sk_buff *skb, struct nlmsghdr *nlh,
 	return err;
 }
 
-void vxlan_vnifilter_init(void)
+static const struct rtnl_msg_handler vxlan_vnifilter_rtnl_msg_handlers[] = {
+	{THIS_MODULE, PF_BRIDGE, RTM_GETTUNNEL, NULL, vxlan_vnifilter_dump, 0},
+	{THIS_MODULE, PF_BRIDGE, RTM_NEWTUNNEL, vxlan_vnifilter_process, NULL, 0},
+	{THIS_MODULE, PF_BRIDGE, RTM_DELTUNNEL, vxlan_vnifilter_process, NULL, 0},
+};
+
+int vxlan_vnifilter_init(void)
 {
-	rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETTUNNEL, NULL,
-			     vxlan_vnifilter_dump, 0);
-	rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWTUNNEL,
-			     vxlan_vnifilter_process, NULL, 0);
-	rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELTUNNEL,
-			     vxlan_vnifilter_process, NULL, 0);
+	return rtnl_register_many(vxlan_vnifilter_rtnl_msg_handlers);
 }
 
 void vxlan_vnifilter_uninit(void)
 {
-	rtnl_unregister(PF_BRIDGE, RTM_GETTUNNEL);
-	rtnl_unregister(PF_BRIDGE, RTM_NEWTUNNEL);
-	rtnl_unregister(PF_BRIDGE, RTM_DELTUNNEL);
+	rtnl_unregister_many(vxlan_vnifilter_rtnl_msg_handlers);
 }