Included change:

- Check if the skb has been correctly prepared before going on
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Merge tag 'batman-adv-fix-for-davem' of git://git.open-mesh.org/linux-merge

Included change:
- Check if the skb has been correctly prepared before going on

net/batman-adv/unicast.c

@@ -432,12 +432,16 @@ find_router:
 
 	switch (packet_type) {
 	case BATADV_UNICAST:
-		batadv_unicast_prepare_skb(skb, orig_node);
+		if (!batadv_unicast_prepare_skb(skb, orig_node))
+			goto out;
+
 		header_len = sizeof(struct batadv_unicast_packet);
 		break;
 	case BATADV_UNICAST_4ADDR:
-		batadv_unicast_4addr_prepare_skb(bat_priv, skb, orig_node,
-						 packet_subtype);
+		if (!batadv_unicast_4addr_prepare_skb(bat_priv, skb, orig_node,
+						      packet_subtype))
+			goto out;
+
 		header_len = sizeof(struct batadv_unicast_4addr_packet);
 		break;
 	default: