From: Jeff Peeler <jpeeler@digium.com>
Date: Mon, 17 Aug 2009 16:34:56 +0000 (+0000)
Subject: Fix segfault when reloading chan_misdn.
X-Git-Tag: 1.4.26.2~4^2~25
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d924b5349e06953c5e799bd291156ae3910e6cc3;p=thirdparty%2Fasterisk.git

Fix segfault when reloading chan_misdn.

If more ports were specified than configured in misdn.conf a reload would crash
asterisk. The problem was the unconfigured port was using data from the
previously configured port. When the data for an unconfigured port was freed a
crash would result from the double free.

(closes issue #12113)
Reported by: agupta
Patches:
      bug12113.patch uploaded by jpeeler (license 325)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@212498 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/channels/misdn_config.c b/channels/misdn_config.c
index 1cbd190212..9d947f726a 100644
--- a/channels/misdn_config.c
+++ b/channels/misdn_config.c
@@ -1001,6 +1001,11 @@ static void _build_port_config (struct ast_variable *v, char *cat)
 	}
 
 	for (i = 0; i < (max_ports + 1); ++i) {
+		if (i > 0 && cfg_for_ports[0]) {
+			/* default category, will populate the port_cfg with additional port
+			categories in subsequent calls to this function */
+			memset(cfg_tmp, 0, sizeof(cfg_tmp));
+		}
 		if (cfg_for_ports[i]) {
 			memcpy(port_cfg[i], cfg_tmp, sizeof(cfg_tmp));
 		}