diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 1c51c33c385f..4ee88a9b095d 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -2112,6 +2112,9 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
 	int i;
 	bool found = false;
 
+	if (info->snd_portid != wmediumd_portid)
+		return -EINVAL;
+
 	if (!info->attrs[HWSIM_ATTR_ADDR_TRANSMITTER] ||
 	    !info->attrs[HWSIM_ATTR_FLAGS] ||
 	    !info->attrs[HWSIM_ATTR_COOKIE] ||
@@ -2185,6 +2188,9 @@ static int hwsim_cloned_frame_received_nl(struct sk_buff *skb_2,
 	void *frame_data;
 	struct sk_buff *skb = NULL;
 
+	if (info->snd_portid != wmediumd_portid)
+		return -EINVAL;
+
 	if (!info->attrs[HWSIM_ATTR_ADDR_RECEIVER] ||
 	    !info->attrs[HWSIM_ATTR_FRAME] ||
 	    !info->attrs[HWSIM_ATTR_RX_RATE] ||
@@ -2237,6 +2243,9 @@ out:
 static int hwsim_register_received_nl(struct sk_buff *skb_2,
 				      struct genl_info *info)
 {
+	if (wmediumd_portid)
+		return -EBUSY;
+
 	wmediumd_portid = info->snd_portid;
 
 	printk(KERN_DEBUG "mac80211_hwsim: received a REGISTER, "