Fix a memory leak associated with queues.

For every attempt that app_queue made to place an outbound call to a queue member,
we would allocate a queue_end_bridge structure. When the bridge for the call had
completed, we would free the structure. Unfortunately not all call attempts actually
end up bridged to a member, so we need to be more selective of when to allocate
the structure. With this change, the allocation occurs in an area where we can
guarantee that the call will be bridged.

(closes issue #14680)
Reported by: caspy
Patches:
      14680.patch uploaded by mmichelson (license 60)
Tested by: caspy



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@183244 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/app_queue.c

@@ -3583,19 +3583,6 @@ static int try_calling(struct queue_ent *qe, const char *options, char *announce
 
 		}
 
-	if ((queue_end_bridge = ao2_alloc(sizeof(*queue_end_bridge), NULL))) {
-		queue_end_bridge->q = qe->parent;
-		queue_end_bridge->chan = qe->chan;
-		bridge_config.end_bridge_callback = end_bridge_callback;
-		bridge_config.end_bridge_callback_data = queue_end_bridge;
-		bridge_config.end_bridge_callback_data_fixup = end_bridge_callback_data_fixup;
-		/* Since queue_end_bridge can survive beyond the life of this call to Queue, we need
-		 * to make sure to increase the refcount of this queue so it cannot be freed until we
-		 * are done with it. We remove this reference in end_bridge_callback.
-		 */
-		queue_ref(qe->parent);
-	}
-
 	/* if the calling channel has the ANSWERED_ELSEWHERE flag set, make sure this is inherited. 
 		(this is mainly to support chan_local)
 	*/
@@ -4147,6 +4134,20 @@ static int try_calling(struct queue_ent *qe, const char *options, char *announce
 					qe->parent->eventwhencalled == QUEUE_EVENT_VARIABLES ? vars2manager(qe->chan, vars, sizeof(vars)) : "");
 		ast_copy_string(oldcontext, qe->chan->context, sizeof(oldcontext));
 		ast_copy_string(oldexten, qe->chan->exten, sizeof(oldexten));
+	
+		if ((queue_end_bridge = ao2_alloc(sizeof(*queue_end_bridge), NULL))) {
+			queue_end_bridge->q = qe->parent;
+			queue_end_bridge->chan = qe->chan;
+			bridge_config.end_bridge_callback = end_bridge_callback;
+			bridge_config.end_bridge_callback_data = queue_end_bridge;
+			bridge_config.end_bridge_callback_data_fixup = end_bridge_callback_data_fixup;
+			/* Since queue_end_bridge can survive beyond the life of this call to Queue, we need
+			 * to make sure to increase the refcount of this queue so it cannot be freed until we
+			 * are done with it. We remove this reference in end_bridge_callback.
+			 */
+			queue_ref(qe->parent);
+		}
+
 		time(&callstart);
 		transfer_ds = setup_transfer_datastore(qe, member, callstart, callcompletedinsl);
 		bridge = ast_bridge_call(qe->chan,peer, &bridge_config);