From 958cdffa7b29f2b7e9c18002dc74b07ae4f7420f Mon Sep 17 00:00:00 2001
From: Alexander Boettcher <alexander.boettcher@genode-labs.com>
Date: Fri, 12 Apr 2013 12:30:17 +0200
Subject: [PATCH] dde_ipxe: fix null pointer de-referencing

Issue #593
---
 dde_ipxe/src/lib/dde_ipxe/nic.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dde_ipxe/src/lib/dde_ipxe/nic.c b/dde_ipxe/src/lib/dde_ipxe/nic.c
index 57a58e1f9..f9134c97c 100644
--- a/dde_ipxe/src/lib/dde_ipxe/nic.c
+++ b/dde_ipxe/src/lib/dde_ipxe/nic.c
@@ -260,6 +260,10 @@ int dde_ipxe_nic_tx(unsigned if_index, const char *packet, unsigned packet_len)
 	struct io_buffer *iobuf = alloc_iob(packet_len);
 
 	LEAVE;
+
+	if (!iobuf)
+		return -1;
+
 	memcpy(iob_put(iobuf, packet_len), packet, packet_len);
 	ENTER;