Merged revisions 321926 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.8

........
  r321926 | rmudgett | 2011-06-03 17:09:36 -0500 (Fri, 03 Jun 2011) | 18 lines
  
  Asterisk crash when unloading cdr_radius/cel_radius.
  
  The rc_openlog() API call is passed a string that is used by openlog() to
  format log messages.  The openlog() does not copy the string it just keeps
  a pointer to it.  When the module is unloaded, the string is gone from
  memory.  Depending upon module load order and if the other module then has
  an error, a crash happens.
  
  * Pass rc_openlog() a strdup'd string with the understanding that there
  will be a small memory leak if the cdr_radius/cel_radius modules are
  unloaded.
  
  * Call rc_destroy() to free the rc handle memory when the module is
  unloaded.
  
  JIRA AST-483
  JIRA SWP-3062
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@321927 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 19 insertions, 3 deletions

diff --git a/cel/cel_radius.c b/cel/cel_radius.c
index 6ffd9fef8..f5ccb5f8a 100644
--- a/cel/cel_radius.c
+++ b/cel/cel_radius.c
@@ -206,6 +206,10 @@ static int unload_module(void)
 	if (event_sub) {
 		event_sub = ast_event_unsubscribe(event_sub);
 	}
+	if (rh) {
+		rc_destroy(rh);
+		rh = NULL;
+	}
 	return AST_MODULE_LOAD_SUCCESS;
 }
 
@@ -225,8 +229,17 @@ static int load_module(void)
 		return AST_MODULE_LOAD_DECLINE;
 	}
 
-	/* start logging */
-	rc_openlog("asterisk");
+	/*
+	 * start logging
+	 *
+	 * NOTE: Yes this causes a slight memory leak if the module is
+	 * unloaded.  However, it is better than a crash if cdr_radius
+	 * and cel_radius are both loaded.
+	 */
+	tmp = ast_strdup("asterisk");
+	if (tmp) {
+		rc_openlog((char *) tmp);
+	}
 
 	/* read radiusclient-ng config file */
 	if (!(rh = rc_read_config(radiuscfg))) {
@@ -237,12 +250,15 @@ static int load_module(void)
 	/* read radiusclient-ng dictionaries */
 	if (rc_read_dictionary(rh, rc_conf_str(rh, "dictionary"))) {
 		ast_log(LOG_NOTICE, "Cannot load radiusclient-ng dictionary file.\n");
+		rc_destroy(rh);
+		rh = NULL;
 		return AST_MODULE_LOAD_DECLINE;
 	}
 
 	event_sub = ast_event_subscribe(AST_EVENT_CEL, radius_log, "CEL Radius Logging", NULL, AST_EVENT_IE_END);
-
 	if (!event_sub) {
+		rc_destroy(rh);
+		rh = NULL;
 		return AST_MODULE_LOAD_DECLINE;
 	} else {
 		return AST_MODULE_LOAD_SUCCESS;