From 34b61d3f1d6b5a0d4425f8edfa69d707cfa058b7 Mon Sep 17 00:00:00 2001
From: Daniel-Constantin Mierla <miconda@gmail.com>
Date: Thu, 9 Sep 2021 10:25:29 +0200
Subject: [PATCH] tm: skip body operation on empty string for uac building

---
 src/modules/tm/t_msgbuilder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/modules/tm/t_msgbuilder.c b/src/modules/tm/t_msgbuilder.c
index ef9b45e2461..27aaef9b5fa 100644
--- a/src/modules/tm/t_msgbuilder.c
+++ b/src/modules/tm/t_msgbuilder.c
@@ -1637,7 +1637,7 @@ char* build_uac_req(str* method, str* headers, str* body, dlg_t* dialog,
 			memapp(w, CRLF, CRLF_LEN);
 	}
 	memapp(w, CRLF, CRLF_LEN);
-	if (body) memapp(w, body->s, body->len);
+	if (body && body->s && body->len>0) memapp(w, body->s, body->len);
 
 #ifdef EXTRA_DEBUG
 	assert(w-buf == *len);