From: Andrei Borzenkov <arvidjaar@gmail.com>
Date: Sun, 20 Mar 2016 07:32:33 +0000 (+0300)
Subject: bootp: check that interface is not NULL in configure_by_dhcp_ack
X-Git-Tag: 2.02-rc1~83
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6714d7ecffe58021760e4d1ebfa9cc3473f7fb24;p=thirdparty%2Fgrub.git

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.
---

diff --git a/grub-core/net/bootp.c b/grub-core/net/bootp.c
index 09c6f7606..189551a48 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -157,6 +157,9 @@ 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