From 7cc1d1113e8e461656d55595f1a268d345d2676b Mon Sep 17 00:00:00 2001
From: zxcpoiu <zxcpoiu@gmail.com>
Date: Wed, 23 Sep 2015 17:23:40 +0800
Subject: [PATCH] tmx: safety check for bad callid header in t_precheck_tran()
 - reported by GH#331

---
 modules/tmx/tmx_pretran.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/tmx/tmx_pretran.c b/modules/tmx/tmx_pretran.c
index 8ba74df4fb7..00f571bb4a8 100644
--- a/modules/tmx/tmx_pretran.c
+++ b/modules/tmx/tmx_pretran.c
@@ -227,6 +227,10 @@ int tmx_check_pretran(sip_msg_t *msg)
 		LM_ERR("failed to get From header\n");
 		return -1;
 	}
+	if (msg->callid==NULL || msg->callid->body.s==NULL) {
+		LM_ERR("failed to parse callid headers\n");
+		return -1;
+	}
 
 	vbr = msg->via1->branch;