From c69914367da0c3859e01017516c3b197b11da3a7 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Mon, 13 Aug 2012 20:57:19 +0200
Subject: [PATCH] Sanity-check the size of netif->hwaddr

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

diff --git a/src/core/dhcp.c b/src/core/dhcp.c
index 614fa324..2851d712 100644
--- a/src/core/dhcp.c
+++ b/src/core/dhcp.c
@@ -1693,7 +1693,7 @@ dhcp_create_msg(struct netif *netif, struct dhcp *dhcp, u8_t message_type)
   ip_addr_set_zero(&dhcp->msg_out->giaddr);
   for (i = 0; i < DHCP_CHADDR_LEN; i++) {
     /* copy netif hardware address, pad with zeroes */
-    dhcp->msg_out->chaddr[i] = (i < netif->hwaddr_len) ? netif->hwaddr[i] : 0/* pad byte*/;
+    dhcp->msg_out->chaddr[i] = (i < netif->hwaddr_len && i < NETIF_MAX_HWADDR_LEN) ? netif->hwaddr[i] : 0/* pad byte*/;
   }
   for (i = 0; i < DHCP_SNAME_LEN; i++) {
     dhcp->msg_out->sname[i] = 0;