[B.A.T.M.A.N.] [PATCH 2/2] batman-adv: Fix imbalanced locking in gw_node_update

[Sven Eckelmann <sven@narfation.org>]

8ffdea813e32cee3c60be36fb9e6a5e077e51ea0 used rcu_read_unlock without
using rcu_read_lock when gw_get_selected_gw_node didn't return a valid
gw_node.

Signed-off-by: Sven Eckelmann <sven@narfation.org>
---
 gateway_client.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/gateway_client.c b/gateway_client.c
index 3d0050b..a5757da 100644
--- a/gateway_client.c
+++ b/gateway_client.c
@@ -312,7 +312,7 @@ void gw_node_update(struct bat_priv *bat_priv,
 
 	curr_gw = gw_get_selected_gw_node(bat_priv);
 	if (!curr_gw)
-		goto out;
+		goto freeref;
 
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(gw_node, node, &bat_priv->gw_list, list) {
@@ -350,6 +350,7 @@ deselect:
 	gw_deselect(bat_priv);
 out:
 	rcu_read_unlock();
+freeref:
 	if (curr_gw)
 		gw_node_free_ref(curr_gw);
 }
-- 
1.7.4.1