From f1385e222e0f080b9bba47bd680b001a3361f2bf Mon Sep 17 00:00:00 2001
From: Peter Krempa <pkrempa@redhat.com>
Date: Mon, 16 Jun 2014 16:03:01 +0200
Subject: [PATCH] net: leaseshelper: Don't crash if DNSMASQ doesn't provide
 lease expiry

The value is provided via environment and causes a crash if not defined.
---
 src/network/leaseshelper.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/network/leaseshelper.c b/src/network/leaseshelper.c
index bf1842b87f..99c47a9b7b 100644
--- a/src/network/leaseshelper.c
+++ b/src/network/leaseshelper.c
@@ -181,7 +181,8 @@ main(int argc, char **argv)
         goto cleanup;
 
     /* Removed extraneous trailing space in DNSMASQ_LEASE_EXPIRES (dnsmasq < 2.52) */
-    if (exptime[strlen(exptime) - 1] == ' ')
+    if (exptime &&
+        exptime[strlen(exptime) - 1] == ' ')
         exptime[strlen(exptime) - 1] = '\0';
 
     /* Check if it is an IPv6 lease */