Merged revisions 335991 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/10

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  r335991 | irroot | 2011-09-15 10:29:12 +0200 (Thu, 15 Sep 2011) | 17 lines
  
  Merged revisions 335978 via svnmerge from 
  https://origsvn.digium.com/svn/asterisk/branches/1.8
  
  ........
    r335978 | irroot | 2011-09-15 10:15:22 +0200 (Thu, 15 Sep 2011) | 11 lines
    
    lock the channel before calling ast_bridged_channel() to prevent a seg fault.
    
    AMI agents list called on shutdown causes a segfault, introducing proper locking
    will prevent this.
    
    (closes issue ASTERISK-18092)
    
    Reported by: agustina
    Patches: chan_agent.patch (License #5041) patch uploaded by irroot
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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@335993 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_agent.c

@@ -1507,6 +1507,7 @@ static int action_agents(struct mansession *s, const struct message *m)
 	char *talkingto = NULL;
 	char *talkingtoChan = NULL;
 	char *status = NULL;
+	struct ast_channel *bridge;
 
 	if (!ast_strlen_zero(id))
 		snprintf(idText, sizeof(idText) ,"ActionID: %s\r\n", id);
@@ -1531,10 +1532,13 @@ static int action_agents(struct mansession *s, const struct message *m)
 			if (p->owner && p->owner->_bridge) {
 				talkingto = S_COR(p->chan->caller.id.number.valid,
 					p->chan->caller.id.number.str, "n/a");
-				if (ast_bridged_channel(p->owner))
-					talkingtoChan = ast_strdupa(ast_bridged_channel(p->owner)->name);
-				else
+				ast_channel_lock(p->owner);
+				if ((bridge = ast_bridged_channel(p->owner))) {
+					talkingtoChan = ast_strdupa(bridge->name);
+				} else {
 					talkingtoChan = "n/a";
+				}
+				ast_channel_unlock(p->owner);
 				status = "AGENT_ONCALL";
 			} else {
 				talkingto = "n/a";