Prevent accessing NULL as a PE header when we have a bad file, found with Stefan100...

svn path=/trunk/; revision=38801

diff --git a/reactos/boot/freeldr/freeldr/reactos/imageldr.c b/reactos/boot/freeldr/freeldr/reactos/imageldr.c
index 7e985b7..eca27b1 100644 (file)
--- 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;