From 0db313f0047fc512dec2976cac168989b60d49c8 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Thu, 14 May 2015 13:24:38 +0200
Subject: [PATCH] tmx: check for empty result not to allocate 0 bytes

- allocation of 0 size is undefined when using system malloc
---
 modules/tmx/t_mi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/tmx/t_mi.c b/modules/tmx/t_mi.c
index 735e9114920..485b160eec1 100644
--- a/modules/tmx/t_mi.c
+++ b/modules/tmx/t_mi.c
@@ -228,6 +228,10 @@ static inline char *get_hfblock( str *uri, struct hdr_field *hf, int *l, struct
 		LM_DBG("one more hf processed\n");
 	} /* header loop */
 
+	if(total_len==0) {
+		LM_DBG("empty result\n");
+		goto error;
+	}
 
 	/* construct a single header block now */
 	ret=pkg_malloc(total_len);