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Asterisk crash when unloading cdr_radius/cel_radius.

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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/branches/1.8@321926 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Richard Mudgett
2011-06-03 22:09:36 +00:00
parent 549f79b9f3
commit 6b10de8830
2 changed files with 43 additions and 7 deletions
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28
cdr/cdr_radius.c
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@@ -224,6 +224,10 @@ return_cleanup:
static int unload_module(void)
{
ast_cdr_unregister(name);
if (rh) {
rc_destroy(rh);
rh = NULL;
}
return 0;
}
@@ -243,8 +247,17 @@ static int load_module(void)
} else
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))) {
@@ -255,11 +268,18 @@ 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;
}
ast_cdr_register(name, desc, radius_log);
return AST_MODULE_LOAD_SUCCESS;
if (ast_cdr_register(name, desc, radius_log)) {
rc_destroy(rh);
rh = NULL;
return AST_MODULE_LOAD_DECLINE;
} else {
return AST_MODULE_LOAD_SUCCESS;
}
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "RADIUS CDR Backend",