1 files changed, 34 insertions, 23 deletions

diff --git a/net/batman-adv/unicast.c b/net/batman-adv/unicast.c
index 00bfeaf..7ca994c 100644
--- a/net/batman-adv/unicast.c
+++ b/net/batman-adv/unicast.c
@@ -285,38 +285,42 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 	struct unicast_packet *unicast_packet;
 	struct orig_node *orig_node = NULL;
 	struct batman_if *batman_if;
-	struct neigh_node *router;
+	struct neigh_node *neigh_node;
 	int data_len = skb->len;
 	uint8_t dstaddr[6];
+	int ret = 1;
 
 	spin_lock_bh(&bat_priv->orig_hash_lock);
 
 	/* get routing information */
 	if (is_multicast_ether_addr(ethhdr->h_dest))
 		orig_node = (struct orig_node *)gw_get_selected(bat_priv);
+		if (orig_node) {
+			kref_get(&orig_node->refcount);
+			goto find_router;
+	}
 
-	/* check for hna host */
-	if (!orig_node)
-		orig_node = transtable_search(bat_priv, ethhdr->h_dest);
+	/* check for hna host - increases orig_node refcount */
+	orig_node = transtable_search(bat_priv, ethhdr->h_dest);
 
+find_router:
 	/* find_router() increases neigh_nodes refcount if found. */
-	router = find_router(bat_priv, orig_node, NULL);
+	neigh_node = find_router(bat_priv, orig_node, NULL);
 
-	if (!router)
+	if (!neigh_node)
 		goto unlock;
 
-	/* don't lock while sending the packets ... we therefore
-		* copy the required data before sending */
-	batman_if = router->if_incoming;
-	memcpy(dstaddr, router->addr, ETH_ALEN);
-
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
-
-	if (batman_if->if_status != IF_ACTIVE)
-		goto dropped;
+	if (neigh_node->if_incoming->if_status != IF_ACTIVE)
+		goto unlock;
 
 	if (my_skb_head_push(skb, sizeof(struct unicast_packet)) < 0)
-		goto dropped;
+		goto unlock;
+
+	/* don't lock while sending the packets ... we therefore
+	 * copy the required data before sending */
+	batman_if = neigh_node->if_incoming;
+	memcpy(dstaddr, neigh_node->addr, ETH_ALEN);
+	spin_unlock_bh(&bat_priv->orig_hash_lock);
 
 	unicast_packet = (struct unicast_packet *)skb->data;
 
@@ -330,18 +334,25 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 
 	if (atomic_read(&bat_priv->fragmentation) &&
 	    data_len + sizeof(struct unicast_packet) >
-	    batman_if->net_dev->mtu) {
+						batman_if->net_dev->mtu) {
 		/* send frag skb decreases ttl */
 		unicast_packet->ttl++;
-		return frag_send_skb(skb, bat_priv, batman_if,
-				     dstaddr);
+		ret = frag_send_skb(skb, bat_priv, batman_if, dstaddr);
+		goto out;
 	}
+
 	send_skb_packet(skb, batman_if, dstaddr);
-	return 0;
+	ret = 0;
+	goto out;
 
 unlock:
 	spin_unlock_bh(&bat_priv->orig_hash_lock);
-dropped:
-	kfree_skb(skb);
-	return 1;
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		kref_put(&orig_node->refcount, orig_node_free_ref);
+	if (ret == 1)
+		kfree_skb(skb);
+	return ret;
 }