mac80211: delete mesh_path timer on mesh_path removal

This avoids dereferencing a no longer existing struct mesh_path.
Signed-off-by: Luis Carlos Cobo <luisca@cozybit.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

net/mac80211/mesh_pathtbl.c

@@ -301,6 +301,7 @@ static void mesh_path_node_reclaim(struct rcu_head *rp)
 	struct ieee80211_sub_if_data *sdata =
 		IEEE80211_DEV_TO_SUB_IF(node->mpath->dev);
 
+	del_timer_sync(&node->mpath->timer);
 	atomic_dec(&sdata->u.sta.mpaths);
 	kfree(node->mpath);
 	kfree(node);