From: Eliel C. Sardanons <eliels@gmail.com>
Date: Sun, 31 May 2009 01:22:15 +0000 (+0000)
Subject: Avoid a crash when res_timing_dahdi is unloaded but wasn't properly loaded.
X-Git-Tag: 11.0.0-beta1~4759
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0c99bc31cba3c2002889b97b0d9d6a999c760c18;p=thirdparty%2Fasterisk.git

Avoid a crash when res_timing_dahdi is unloaded but wasn't properly loaded.

if dahdi_test_timer() fails, timing_funcs_handle remains NULL causing a crash
when calling ast_unregister_timing_interface() with a NULL pointer.

(closes issue #15234)
Reported by: eliel
Patches:
      timing_dahdi1.diff uploaded by eliel (license 64)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@198437 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---

diff --git a/res/res_timing_dahdi.c b/res/res_timing_dahdi.c
index bc65bbdcf0..ae95cf9cd8 100644
--- a/res/res_timing_dahdi.c
+++ b/res/res_timing_dahdi.c
@@ -192,7 +192,11 @@ static int load_module(void)
 
 static int unload_module(void)
 {
-	return ast_unregister_timing_interface(timing_funcs_handle);
+	if (timing_funcs_handle) {
+		return ast_unregister_timing_interface(timing_funcs_handle);
+	}
+
+	return 0;
 }
 
 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "DAHDI Timing Interface");