---

yaml
---
r: 236744
b: refs/heads/master
c: fbb327c
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5dd36bc933e8be84f8369ac64505a2938f9ce036
+refs/heads/master: fbb327c5945448e98480d610815143a6d4a63638

trunk/net/mac80211/rx.c

@@ -1556,17 +1556,36 @@ __ieee80211_data_to_8023(struct ieee80211_rx_data *rx)
 {
 	struct ieee80211_sub_if_data *sdata = rx->sdata;
 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)rx->skb->data;
+	bool check_port_control = false;
+	struct ethhdr *ehdr;
+	int ret;
 
 	if (ieee80211_has_a4(hdr->frame_control) &&
 	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
 		return -1;
 
+	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
+	    !!sdata->u.mgd.use_4addr != !!ieee80211_has_a4(hdr->frame_control)) {
+
+		if (!sdata->u.mgd.use_4addr)
+			return -1;
+		else
+			check_port_control = true;
+	}
+
 	if (is_multicast_ether_addr(hdr->addr1) &&
-	    ((sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta) ||
-	     (sdata->vif.type == NL80211_IFTYPE_STATION && sdata->u.mgd.use_4addr)))
+	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN && sdata->u.vlan.sta)
 		return -1;
 
-	return ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
+	ret = ieee80211_data_to_8023(rx->skb, sdata->vif.addr, sdata->vif.type);
+	if (ret < 0 || !check_port_control)
+		return ret;
+
+	ehdr = (struct ethhdr *) rx->skb->data;
+	if (ehdr->h_proto != rx->sdata->control_port_protocol)
+		return -1;
+
+	return 0;
 }
 
 /*