The function make_trunk() can fail and return -1 instead of a valid new call

number.  Fix the uses of this function to handle this instead of treating it
as the new call number.  This would cause a deadlock and memory corruption.
(possible cause of issue #9614 and others, patch by me)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.2@74766 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_iax2.c

@@ -6959,7 +6959,9 @@ retryowner:
 					check_provisioning(&sin, fd, ies.serviceident, ies.provver);
 				/* If we're in trunk mode, do it now, and update the trunk number in our frame before continuing */
 				if (ast_test_flag(iaxs[fr->callno], IAX_TRUNK)) {
-					fr->callno = make_trunk(fr->callno, 1);
+					int new_callno;
+					if ((new_callno = make_trunk(fr->callno, 1)) != -1)
+						fr->callno = new_callno;
 				}
 				/* For security, always ack immediately */
 				if (delayreject)
@@ -8072,8 +8074,11 @@ static struct ast_channel *iax2_request(const char *type, int format, void *data
 
 	/* If this is a trunk, update it now */
 	ast_copy_flags(iaxs[callno], &cai, IAX_TRUNK | IAX_SENDANI | IAX_NOTRANSFER | IAX_USEJITTERBUF | IAX_FORCEJITTERBUF);	
-	if (ast_test_flag(&cai, IAX_TRUNK))
-		callno = make_trunk(callno, 1);
+	if (ast_test_flag(&cai, IAX_TRUNK)) {
+		int new_callno;
+		if ((new_callno = make_trunk(callno, 1)) != -1)
+			callno = new_callno;
+	}
 	iaxs[callno]->maxtime = cai.maxtime;
 	if (cai.found)
 		ast_copy_string(iaxs[callno]->host, pds.peer, sizeof(iaxs[callno]->host));