Avoid crash if import directory is messed up

Modified: trunk/reactos/ntoskrnl/ldr/loader.c

--- trunk/reactos/ntoskrnl/ldr/loader.c	2005-01-26 22:34:39 UTC (rev 13324)
+++ trunk/reactos/ntoskrnl/ldr/loader.c	2005-01-26 23:30:50 UTC (rev 13325)
@@ -1577,6 +1577,12 @@

    DPRINT("Processeing import directory at %p\n", ImportModuleDirectory);
    while (ImportModuleDirectory->Name)
    {

+      if (Module->Length <= ImportModuleDirectory->Name)
+      {
+         DPRINT1("Invalid import directory in %wZ\n", &Module->FullName);
+         return STATUS_SECTION_NOT_IMAGE;
+      }
+

       /*  Check to make sure that import lib is kernel  */
       ImportedName = (PCHAR) Module->Base + ImportModuleDirectory->Name;