diff --git a/net/mac802154/wpan.c b/net/mac802154/wpan.c
index 4c133239ad39c34dbc15c855e8d830277eb2c7e7..547838822d5e9c0d7064d72e2dc3be1ff2c14e14 100644
--- a/net/mac802154/wpan.c
+++ b/net/mac802154/wpan.c
@@ -462,7 +462,10 @@ mac802154_subif_frame(struct mac802154_sub_if_data *sdata, struct sk_buff *skb,
 			skb->pkt_type = PACKET_OTHERHOST;
 		break;
 	default:
-		break;
+		spin_unlock_bh(&sdata->mib_lock);
+		pr_debug("invalid dest mode\n");
+		kfree_skb(skb);
+		return NET_RX_DROP;
 	}
 
 	spin_unlock_bh(&sdata->mib_lock);