From 7e0793e15e21f68337e130c67b031ca38edf055f Mon Sep 17 00:00:00 2001
From: Aymeric Moizard <amoizard@gmail.com>
Date: Mon, 5 Sep 2016 15:01:53 +0200
Subject: [PATCH]  * fix bug report: sr #109133: Heap buffer overflow in
 utility function *osip_clrncpy*    https://savannah.gnu.org/support/?109133

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
---
 src/osipparser2/osip_port.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/osipparser2/osip_port.c b/src/osipparser2/osip_port.c
index 0e64147..d8941b0 100644
--- a/src/osipparser2/osip_port.c
+++ b/src/osipparser2/osip_port.c
@@ -1291,8 +1291,10 @@ osip_clrncpy (char *dst, const char *src, size_t len)
 	char *p;
 	size_t spaceless_length;
 
-	if (src == NULL)
+	if (src == NULL || len == 0) {
+		*dst = '\0';
 		return NULL;
+	}
 
 	/* find the start of relevant text */
	pbeg = src;
-- 
2.11.0

