From cc69e56ce3bead7d61e30ec5770072e2f499773a Mon Sep 17 00:00:00 2001
From: Yang Tse <yangsita@gmail.com>
Date: Mon, 2 Jan 2012 13:44:56 +0100
Subject: [PATCH] hostip.c: fix potential write past the end of string buffer

---
 lib/hostip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/hostip.c b/lib/hostip.c
index 828d27e42..503ba483f 100644
--- a/lib/hostip.c
+++ b/lib/hostip.c
@@ -212,7 +212,7 @@ create_hostcache_id(const char *name, int port)
   char *ptr = id;
   if(ptr) {
     /* lower case the name part */
-    while(*ptr != ':') {
+    while(*ptr && (*ptr != ':')) {
       *ptr = (char)TOLOWER(*ptr);
       ptr++;
     }