From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Andrei Borzenkov <arvidjaar@gmail.com>
Date: Sun, 20 Mar 2016 10:32:33 +0300
Subject: [PATCH] bootp: check that interface is not NULL in
 configure_by_dhcp_ack

grub_net_add_addr may fail with OOM and we use returned interface
later without any checks.
---
 grub-core/net/bootp.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 62d602d9645..7df7f55110e 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -237,6 +237,9 @@ grub_net_configure_by_dhcp_ack (const char *name,
   hwaddr.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
 
   inter = grub_net_add_addr (name, card, &addr, &hwaddr, flags);
+  if (!inter)
+    return 0;
+
 #if 0
   /* This is likely based on misunderstanding. gateway_ip refers to
      address of BOOTP relay and should not be used after BOOTP transaction