From 459110618d07a01e6b436787474f1963d23d04b7 Mon Sep 17 00:00:00 2001
From: Art Yerkes <art.yerkes@gmail.com>
Date: Fri, 16 Jan 2009 23:44:29 +0000
Subject: [PATCH] Prevent accessing NULL as a PE header when we have a bad
 file, found with Stefan100's help

svn path=/trunk/; revision=38801
---
 reactos/boot/freeldr/freeldr/reactos/imageldr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/reactos/boot/freeldr/freeldr/reactos/imageldr.c b/reactos/boot/freeldr/freeldr/reactos/imageldr.c
index 7e985b7ff59..eca27b13f2c 100644
--- a/reactos/boot/freeldr/freeldr/reactos/imageldr.c
+++ b/reactos/boot/freeldr/freeldr/reactos/imageldr.c
@@ -481,6 +481,11 @@ FrLdrReadAndMapImage(IN FILE *Image,
 
     /* Get image headers */
     NtHeader = RtlImageNtHeader(ReadBuffer);
+    if (!NtHeader)
+    {
+	DbgPrint("Failed to read image (bad PE signature) %s\n", Name);
+	return NULL;
+    }
 
     /* Allocate memory for the driver */
     ImageSize = NtHeader->OptionalHeader.SizeOfImage;