If the channels acquired using the manager Redirect action are not up, then

don't attempt to do anything with them.  It could lead to weird behavior,
including crashes.  (issue #8977)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@58164 65c4cc65-6c06-0410-ace0-fbb531ad65f3

manager.c

@@ -879,6 +879,11 @@ static int action_redirect(struct mansession *s, struct message *m)
 		return 0;
 	}
 	chan = ast_get_channel_by_name_locked(name);
+	if (chan->_state != AST_STATE_UP) {
+		astman_send_error(s, m, "Redirect failed, channel not up.\n");
+		ast_mutex_unlock(&chan->lock);
+		return 0;
+	}
 	if (!chan) {
 		char buf[BUFSIZ];
 		snprintf(buf, sizeof(buf), "Channel does not exist: %s", name);
@@ -887,6 +892,12 @@ static int action_redirect(struct mansession *s, struct message *m)
 	}
 	if (!ast_strlen_zero(name2))
 		chan2 = ast_get_channel_by_name_locked(name2);
+	if (chan2 && chan2->_state != AST_STATE_UP) {
+		astman_send_error(s, m, "Redirect failed, extra channel not up.\n");
+		ast_mutex_unlock(&chan->lock);
+		ast_mutex_unlock(&chan2->lock);
+		return 0;
+	}
 	res = ast_async_goto(chan, context, exten, pi);
 	if (!res) {
 		if (!ast_strlen_zero(name2)) {