From 69bd5a29d9c184652bb241de5d8388566bcbddb7 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon>
Date: Sat, 12 Jun 2010 17:05:54 +0000
Subject: [PATCH] Fixed a possible NULL-pointer deref before checking it

---
 src/core/dhcp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/core/dhcp.c b/src/core/dhcp.c
index 05816f58..b0b3b80f 100644
--- a/src/core/dhcp.c
+++ b/src/core/dhcp.c
@@ -1206,8 +1206,9 @@ dhcp_release(struct netif *netif)
 void
 dhcp_stop(struct netif *netif)
 {
-  struct dhcp *dhcp = netif->dhcp;
+  struct dhcp *dhcp;
   LWIP_ERROR("dhcp_stop: netif != NULL", (netif != NULL), return;);
+  dhcp = netif->dhcp;
   /* Remove the flag that says this netif is handled by DHCP. */
   netif->flags &= ~NETIF_FLAG_DHCP;