Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Pull networking fixes from David Miller:
 "First post-Sandy pull request"

 1) Fix antenna gain handling and initialization of chan->max_reg_power
    in wireless, from Felix Fietkau.

 2) Fix nexthop handling in H.232 conntrack helper, from Julian
    Anastasov.

 3) Only process 80211 mesh config header in certain kinds of frames,
    from Javier Cardona.

 4) 80211 management frame header length needs to be validated, from
    Johannes Berg.

 5) Don't access free'd SKBs in ath9k driver, from Felix Fietkay.

 6) Test for permanent state correctly in VXLAN driver, from Stephen
    Hemminger.

 7) BNX2X bug fixes from Yaniv Rosner and Dmitry Kravkov.

 8) Fix off by one errors in bonding, from Nikolay ALeksandrov.

 9) Fix divide by zero in TCP-Illinois congestion control.  From Jesper
    Dangaard Brouer.

10) TCP metrics code says "Yo dawg, I heard you like sizeof, so I did a
    sizeof of a sizeof, so you can size your size" Fix from Julian
    Anastasov.

11) Several drivers do mdiobus_free without first doing an
    mdiobus_unregister leading to stray pointer references.  Fix from
    Peter Senna Tschudin.

12) Fix OOPS in l2tp_eth_create() error path, it's another danling
    pointer kinda situation.  Fix from Tom Parkin.

13) Hardware driven by the vmxnet driver can't handle larger than 16K
    fragments, so split them up when necessary.  From Eric Dumazet.

14) Handle zero length data length in tcp_send_rcvq() properly.  Fix
    from Pavel Emelyanov.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (38 commits)
  tcp-repair: Handle zero-length data put in rcv queue
  vmxnet3: must split too big fragments
  l2tp: fix oops in l2tp_eth_create() error path
  cxgb4: Fix unable to get UP event from the LLD
  drivers/net/phy/mdio-bitbang.c: Call mdiobus_unregister before mdiobus_free
  drivers/net/ethernet/nxp/lpc_eth.c: Call mdiobus_unregister before mdiobus_free
  bnx2x: fix HW initialization using fw 7.8.x
  tcp: Fix double sizeof in new tcp_metrics code
  net: fix divide by zero in tcp algorithm illinois
  net: sctp: Fix typo in net/sctp
  bonding: fix second off-by-one error
  bonding: fix off-by-one error
  bnx2x: Disable FCoE for 57840 since not yet supported by FW
  bnx2x: Fix no link on 577xx 10G-baseT
  bnx2x: Fix unrecognized SFP+ module after driver is loaded
  bnx2x: Fix potential incorrect link speed provision
  bnx2x: Restore global registers back to default.
  bnx2x: Fix link down in 57712 following LFA
  bnx2x: Fix 57810 1G-KR link against certain switches.
  ixgbe: PTP get_ts_info missing software support
  ...

15 files changed, 125 insertions, 46 deletions

diff --git a/net/ipv4/netfilter/iptable_nat.c b/net/ipv4/netfilter/iptable_nat.c
index 9e0ffaf1d942..a82047282dbb 100644
--- a/net/ipv4/netfilter/iptable_nat.c
+++ b/net/ipv4/netfilter/iptable_nat.c
@@ -184,7 +184,8 @@ nf_nat_ipv4_out(unsigned int hooknum,
 
 		if ((ct->tuplehash[dir].tuple.src.u3.ip !=
 		     ct->tuplehash[!dir].tuple.dst.u3.ip) ||
-		    (ct->tuplehash[dir].tuple.src.u.all !=
+		    (ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP &&
+		     ct->tuplehash[dir].tuple.src.u.all !=
 		     ct->tuplehash[!dir].tuple.dst.u.all))
 			if (nf_xfrm_me_harder(skb, AF_INET) < 0)
 				ret = NF_DROP;
@@ -221,6 +222,7 @@ nf_nat_ipv4_local_fn(unsigned int hooknum,
 		}
 #ifdef CONFIG_XFRM
 		else if (!(IPCB(skb)->flags & IPSKB_XFRM_TRANSFORMED) &&
+			 ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMP &&
 			 ct->tuplehash[dir].tuple.dst.u.all !=
 			 ct->tuplehash[!dir].tuple.src.u.all)
 			if (nf_xfrm_me_harder(skb, AF_INET) < 0)
diff --git a/net/ipv4/tcp_illinois.c b/net/ipv4/tcp_illinois.c
index 813b43a76fec..834857f3c871 100644
--- a/net/ipv4/tcp_illinois.c
+++ b/net/ipv4/tcp_illinois.c
@@ -313,11 +313,13 @@ static void tcp_illinois_info(struct sock *sk, u32 ext,
 			.tcpv_rttcnt = ca->cnt_rtt,
 			.tcpv_minrtt = ca->base_rtt,
 		};
-		u64 t = ca->sum_rtt;
 
-		do_div(t, ca->cnt_rtt);
-		info.tcpv_rtt = t;
+		if (info.tcpv_rttcnt > 0) {
+			u64 t = ca->sum_rtt;
 
+			do_div(t, info.tcpv_rttcnt);
+			info.tcpv_rtt = t;
+		}
 		nla_put(skb, INET_DIAG_VEGASINFO, sizeof(info), &info);
 	}
 }
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 1db663983587..2c2b13a999ea 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4529,6 +4529,9 @@ int tcp_send_rcvq(struct sock *sk, struct msghdr *msg, size_t size)
 	struct tcphdr *th;
 	bool fragstolen;
 
+	if (size == 0)
+		return 0;
+
 	skb = alloc_skb(size + sizeof(*th), sk->sk_allocation);
 	if (!skb)
 		goto err;
diff --git a/net/ipv4/tcp_metrics.c b/net/ipv4/tcp_metrics.c
index 4c752a6e0bcd..53bc5847bfa8 100644
--- a/net/ipv4/tcp_metrics.c
+++ b/net/ipv4/tcp_metrics.c
@@ -864,7 +864,7 @@ static int parse_nl_addr(struct genl_info *info, struct inetpeer_addr *addr,
 	}
 	a = info->attrs[TCP_METRICS_ATTR_ADDR_IPV6];
 	if (a) {
-		if (nla_len(a) != sizeof(sizeof(struct in6_addr)))
+		if (nla_len(a) != sizeof(struct in6_addr))
 			return -EINVAL;
 		addr->family = AF_INET6;
 		memcpy(addr->addr.a6, nla_data(a), sizeof(addr->addr.a6));
diff --git a/net/ipv6/netfilter/ip6table_nat.c b/net/ipv6/netfilter/ip6table_nat.c
index e418bd6350a4..d57dab17a182 100644
--- a/net/ipv6/netfilter/ip6table_nat.c
+++ b/net/ipv6/netfilter/ip6table_nat.c
@@ -186,7 +186,8 @@ nf_nat_ipv6_out(unsigned int hooknum,
 
 		if (!nf_inet_addr_cmp(&ct->tuplehash[dir].tuple.src.u3,
 				      &ct->tuplehash[!dir].tuple.dst.u3) ||
-		    (ct->tuplehash[dir].tuple.src.u.all !=
+		    (ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMPV6 &&
+		     ct->tuplehash[dir].tuple.src.u.all !=
 		     ct->tuplehash[!dir].tuple.dst.u.all))
 			if (nf_xfrm_me_harder(skb, AF_INET6) < 0)
 				ret = NF_DROP;
@@ -222,6 +223,7 @@ nf_nat_ipv6_local_fn(unsigned int hooknum,
 		}
 #ifdef CONFIG_XFRM
 		else if (!(IP6CB(skb)->flags & IP6SKB_XFRM_TRANSFORMED) &&
+			 ct->tuplehash[dir].tuple.dst.protonum != IPPROTO_ICMPV6 &&
 			 ct->tuplehash[dir].tuple.dst.u.all !=
 			 ct->tuplehash[!dir].tuple.src.u.all)
 			if (nf_xfrm_me_harder(skb, AF_INET6))
diff --git a/net/ipv6/netfilter/nf_conntrack_reasm.c b/net/ipv6/netfilter/nf_conntrack_reasm.c
index 18bd9bbbd1c6..22c8ea951185 100644
--- a/net/ipv6/netfilter/nf_conntrack_reasm.c
+++ b/net/ipv6/netfilter/nf_conntrack_reasm.c
@@ -85,7 +85,7 @@ static struct ctl_table nf_ct_frag6_sysctl_table[] = {
 	{ }
 };
 
-static int __net_init nf_ct_frag6_sysctl_register(struct net *net)
+static int nf_ct_frag6_sysctl_register(struct net *net)
 {
 	struct ctl_table *table;
 	struct ctl_table_header *hdr;
@@ -127,7 +127,7 @@ static void __net_exit nf_ct_frags6_sysctl_unregister(struct net *net)
 }
 
 #else
-static int __net_init nf_ct_frag6_sysctl_register(struct net *net)
+static int nf_ct_frag6_sysctl_register(struct net *net)
 {
 	return 0;
 }
diff --git a/net/l2tp/l2tp_eth.c b/net/l2tp/l2tp_eth.c
index 37b8b8ba31f7..76125c57ee6d 100644
--- a/net/l2tp/l2tp_eth.c
+++ b/net/l2tp/l2tp_eth.c
@@ -291,6 +291,7 @@ static int l2tp_eth_create(struct net *net, u32 tunnel_id, u32 session_id, u32 p
 
 out_del_dev:
 	free_netdev(dev);
+	spriv->dev = NULL;
 out_del_session:
 	l2tp_session_delete(session);
 out:
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 5f3620f0bc0a..bf87c70ac6c5 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1108,7 +1108,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
 	sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
 	sdata->u.ibss.ibss_join_req = jiffies;
 
-	memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN);
+	memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len);
 	sdata->u.ibss.ssid_len = params->ssid_len;
 
 	mutex_unlock(&sdata->u.ibss.mtx);
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 61c621e9273f..00ade7feb2e3 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -531,6 +531,11 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
 
 		if (ieee80211_is_action(hdr->frame_control)) {
 			u8 category;
+
+			/* make sure category field is present */
+			if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE)
+				return RX_DROP_MONITOR;
+
 			mgmt = (struct ieee80211_mgmt *)hdr;
 			category = mgmt->u.action.category;
 			if (category != WLAN_CATEGORY_MESH_ACTION &&
@@ -883,14 +888,16 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
 		 */
 		if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
 		    ieee80211_is_data_present(hdr->frame_control)) {
-			u16 ethertype;
-			u8 *payload;
-
-			payload = rx->skb->data +
-				ieee80211_hdrlen(hdr->frame_control);
-			ethertype = (payload[6] << 8) | payload[7];
-			if (cpu_to_be16(ethertype) ==
-			    rx->sdata->control_port_protocol)
+			unsigned int hdrlen;
+			__be16 ethertype;
+
+			hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+			if (rx->skb->len < hdrlen + 8)
+				return RX_DROP_MONITOR;
+
+			skb_copy_bits(rx->skb, hdrlen + 6, &ethertype, 2);
+			if (ethertype == rx->sdata->control_port_protocol)
 				return RX_CONTINUE;
 		}
 
@@ -1462,11 +1469,14 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
 
 	hdr = (struct ieee80211_hdr *)rx->skb->data;
 	fc = hdr->frame_control;
+
+	if (ieee80211_is_ctl(fc))
+		return RX_CONTINUE;
+
 	sc = le16_to_cpu(hdr->seq_ctrl);
 	frag = sc & IEEE80211_SCTL_FRAG;
 
 	if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
-		   (rx->skb)->len < 24 ||
 		   is_multicast_ether_addr(hdr->addr1))) {
 		/* not fragmented */
 		goto out;
@@ -1889,6 +1899,20 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 
 	hdr = (struct ieee80211_hdr *) skb->data;
 	hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+	/* make sure fixed part of mesh header is there, also checks skb len */
+	if (!pskb_may_pull(rx->skb, hdrlen + 6))
+		return RX_DROP_MONITOR;
+
+	mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+
+	/* make sure full mesh header is there, also checks skb len */
+	if (!pskb_may_pull(rx->skb,
+			   hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr)))
+		return RX_DROP_MONITOR;
+
+	/* reload pointers */
+	hdr = (struct ieee80211_hdr *) skb->data;
 	mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
 
 	/* frame is in RMC, don't forward */
@@ -1897,7 +1921,8 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 	    mesh_rmc_check(hdr->addr3, mesh_hdr, rx->sdata))
 		return RX_DROP_MONITOR;
 
-	if (!ieee80211_is_data(hdr->frame_control))
+	if (!ieee80211_is_data(hdr->frame_control) ||
+	    !(status->rx_flags & IEEE80211_RX_RA_MATCH))
 		return RX_CONTINUE;
 
 	if (!mesh_hdr->ttl)
@@ -1911,9 +1936,12 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 		if (is_multicast_ether_addr(hdr->addr1)) {
 			mpp_addr = hdr->addr3;
 			proxied_addr = mesh_hdr->eaddr1;
-		} else {
+		} else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) {
+			/* has_a4 already checked in ieee80211_rx_mesh_check */
 			mpp_addr = hdr->addr4;
 			proxied_addr = mesh_hdr->eaddr2;
+		} else {
+			return RX_DROP_MONITOR;
 		}
 
 		rcu_read_lock();
@@ -1941,12 +1969,9 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
 	}
 	skb_set_queue_mapping(skb, q);
 
-	if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
-		goto out;
-
 	if (!--mesh_hdr->ttl) {
 		IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
-		return RX_DROP_MONITOR;
+		goto out;
 	}
 
 	if (!ifmsh->mshcfg.dot11MeshForwarding)
@@ -2353,6 +2378,10 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 		}
 		break;
 	case WLAN_CATEGORY_SELF_PROTECTED:
+		if (len < (IEEE80211_MIN_ACTION_SIZE +
+			   sizeof(mgmt->u.action.u.self_prot.action_code)))
+			break;
+
 		switch (mgmt->u.action.u.self_prot.action_code) {
 		case WLAN_SP_MESH_PEERING_OPEN:
 		case WLAN_SP_MESH_PEERING_CLOSE:
@@ -2371,6 +2400,10 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
 		}
 		break;
 	case WLAN_CATEGORY_MESH_ACTION:
+		if (len < (IEEE80211_MIN_ACTION_SIZE +
+			   sizeof(mgmt->u.action.u.mesh_action.action_code)))
+			break;
+
 		if (!ieee80211_vif_is_mesh(&sdata->vif))
 			break;
 		if (mesh_action_is_path_sel(mgmt) &&
@@ -2913,10 +2946,15 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
 	if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
 		local->dot11ReceivedFragmentCount++;
 
-	if (ieee80211_is_mgmt(fc))
-		err = skb_linearize(skb);
-	else
+	if (ieee80211_is_mgmt(fc)) {
+		/* drop frame if too short for header */
+		if (skb->len < ieee80211_hdrlen(fc))
+			err = -ENOBUFS;
+		else
+			err = skb_linearize(skb);
+	} else {
 		err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
+	}
 
 	if (err) {
 		dev_kfree_skb(skb);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 94e586873979..239391807ca9 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -643,13 +643,41 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
 			break;
 		}
 
-		if (id != WLAN_EID_VENDOR_SPECIFIC &&
-		    id != WLAN_EID_QUIET &&
-		    test_bit(id, seen_elems)) {
-			elems->parse_error = true;
-			left -= elen;
-			pos += elen;
-			continue;
+		switch (id) {
+		case WLAN_EID_SSID:
+		case WLAN_EID_SUPP_RATES:
+		case WLAN_EID_FH_PARAMS:
+		case WLAN_EID_DS_PARAMS:
+		case WLAN_EID_CF_PARAMS:
+		case WLAN_EID_TIM:
+		case WLAN_EID_IBSS_PARAMS:
+		case WLAN_EID_CHALLENGE:
+		case WLAN_EID_RSN:
+		case WLAN_EID_ERP_INFO:
+		case WLAN_EID_EXT_SUPP_RATES:
+		case WLAN_EID_HT_CAPABILITY:
+		case WLAN_EID_HT_OPERATION:
+		case WLAN_EID_VHT_CAPABILITY:
+		case WLAN_EID_VHT_OPERATION:
+		case WLAN_EID_MESH_ID:
+		case WLAN_EID_MESH_CONFIG:
+		case WLAN_EID_PEER_MGMT:
+		case WLAN_EID_PREQ:
+		case WLAN_EID_PREP:
+		case WLAN_EID_PERR:
+		case WLAN_EID_RANN:
+		case WLAN_EID_CHANNEL_SWITCH:
+		case WLAN_EID_EXT_CHANSWITCH_ANN:
+		case WLAN_EID_COUNTRY:
+		case WLAN_EID_PWR_CONSTRAINT:
+		case WLAN_EID_TIMEOUT_INTERVAL:
+			if (test_bit(id, seen_elems)) {
+				elems->parse_error = true;
+				left -= elen;
+				pos += elen;
+				continue;
+			}
+			break;
 		}
 
 		if (calc_crc && id < 64 && (filter & (1ULL << id)))
diff --git a/net/netfilter/nf_conntrack_h323_main.c b/net/netfilter/nf_conntrack_h323_main.c
index 1b30b0dee708..962795e839ab 100644
--- a/net/netfilter/nf_conntrack_h323_main.c
+++ b/net/netfilter/nf_conntrack_h323_main.c
@@ -753,7 +753,8 @@ static int callforward_do_filter(const union nf_inet_addr *src,
 				   flowi4_to_flowi(&fl1), false)) {
 			if (!afinfo->route(&init_net, (struct dst_entry **)&rt2,
 					   flowi4_to_flowi(&fl2), false)) {
-				if (rt1->rt_gateway == rt2->rt_gateway &&
+				if (rt_nexthop(rt1, fl1.daddr) ==
+				    rt_nexthop(rt2, fl2.daddr) &&
 				    rt1->dst.dev  == rt2->dst.dev)
 					ret = 1;
 				dst_release(&rt2->dst);
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 59d16ea927f0..a60d1f8b41c5 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -974,7 +974,7 @@ SCTP_STATIC int sctp_setsockopt_bindx(struct sock* sk,
 	void *addr_buf;
 	struct sctp_af *af;
 
-	SCTP_DEBUG_PRINTK("sctp_setsocktopt_bindx: sk %p addrs %p"
+	SCTP_DEBUG_PRINTK("sctp_setsockopt_bindx: sk %p addrs %p"
 			  " addrs_size %d opt %d\n", sk, addrs, addrs_size, op);
 
 	if (unlikely(addrs_size <= 0))
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 443d4d7deea2..3f7253052088 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -526,8 +526,7 @@ int wiphy_register(struct wiphy *wiphy)
 		for (i = 0; i < sband->n_channels; i++) {
 			sband->channels[i].orig_flags =
 				sband->channels[i].flags;
-			sband->channels[i].orig_mag =
-				sband->channels[i].max_antenna_gain;
+			sband->channels[i].orig_mag = INT_MAX;
 			sband->channels[i].orig_mpwr =
 				sband->channels[i].max_power;
 			sband->channels[i].band = band;
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 3b8cbbc214db..bcc7d7ee5a51 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -908,7 +908,7 @@ static void handle_channel(struct wiphy *wiphy,
 			map_regdom_flags(reg_rule->flags) | bw_flags;
 		chan->max_antenna_gain = chan->orig_mag =
 			(int) MBI_TO_DBI(power_rule->max_antenna_gain);
-		chan->max_power = chan->orig_mpwr =
+		chan->max_reg_power = chan->max_power = chan->orig_mpwr =
 			(int) MBM_TO_DBM(power_rule->max_eirp);
 		return;
 	}
@@ -1331,7 +1331,8 @@ static void handle_channel_custom(struct wiphy *wiphy,
 
 	chan->flags |= map_regdom_flags(reg_rule->flags) | bw_flags;
 	chan->max_antenna_gain = (int) MBI_TO_DBI(power_rule->max_antenna_gain);
-	chan->max_power = (int) MBM_TO_DBM(power_rule->max_eirp);
+	chan->max_reg_power = chan->max_power =
+		(int) MBM_TO_DBM(power_rule->max_eirp);
 }
 
 static void handle_band_custom(struct wiphy *wiphy, enum ieee80211_band band,
diff --git a/net/wireless/util.c b/net/wireless/util.c
index ef35f4ef2aa6..2762e8329986 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -309,23 +309,21 @@ unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb)
 }
 EXPORT_SYMBOL(ieee80211_get_hdrlen_from_skb);
 
-static int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
+unsigned int ieee80211_get_mesh_hdrlen(struct ieee80211s_hdr *meshhdr)
 {
 	int ae = meshhdr->flags & MESH_FLAGS_AE;
-	/* 7.1.3.5a.2 */
+	/* 802.11-2012, 8.2.4.7.3 */
 	switch (ae) {
+	default:
 	case 0:
 		return 6;
 	case MESH_FLAGS_AE_A4:
 		return 12;
 	case MESH_FLAGS_AE_A5_A6:
 		return 18;
-	case (MESH_FLAGS_AE_A4 | MESH_FLAGS_AE_A5_A6):
-		return 24;
-	default:
-		return 6;
 	}
 }
+EXPORT_SYMBOL(ieee80211_get_mesh_hdrlen);
 
 int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
 			   enum nl80211_iftype iftype)
@@ -373,6 +371,8 @@ int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
 			/* make sure meshdr->flags is on the linear part */
 			if (!pskb_may_pull(skb, hdrlen + 1))
 				return -1;
+			if (meshdr->flags & MESH_FLAGS_AE_A4)
+				return -1;
 			if (meshdr->flags & MESH_FLAGS_AE_A5_A6) {
 				skb_copy_bits(skb, hdrlen +
 					offsetof(struct ieee80211s_hdr, eaddr1),
@@ -397,6 +397,8 @@ int ieee80211_data_to_8023(struct sk_buff *skb, const u8 *addr,
 			/* make sure meshdr->flags is on the linear part */
 			if (!pskb_may_pull(skb, hdrlen + 1))
 				return -1;
+			if (meshdr->flags & MESH_FLAGS_AE_A5_A6)
+				return -1;
 			if (meshdr->flags & MESH_FLAGS_AE_A4)
 				skb_copy_bits(skb, hdrlen +
 					offsetof(struct ieee80211s_hdr, eaddr1),