From b8eeee5528502347492c2180c336e82acee97540 Mon Sep 17 00:00:00 2001
From: likewise <likewise>
Date: Tue, 20 May 2003 09:04:10 +0000
Subject: [PATCH] dhcp_recv() left dangling dhcp->p pointer in case of
 unexpected message. This could result in pbuf_free() assertion (ref count 0)
 or crashes.

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

diff --git a/src/core/dhcp.c b/src/core/dhcp.c
index 4a39cf08..c91b27d7 100644
--- a/src/core/dhcp.c
+++ b/src/core/dhcp.c
@@ -943,6 +943,8 @@ static err_t dhcp_release(struct netif *netif)
 void dhcp_stop(struct netif *netif)
 {
   struct dhcp *dhcp = netif->dhcp;
+  LWIP_ASSERT("dhcp_stop: netif != NULL", netif != NULL);
+
   DEBUGF(DHCP_DEBUG | DBG_TRACE | 3, ("dhcp_stop()\n"));
   /* netif is DHCP configured? */
   if (dhcp != NULL)