[fireball] 24777: - Add a null-check to the IopLoadServiceModule. - Add a DPRINT1 saying about the possible memory-overwrite bug. This is a hack to get a bootable tree, but still have a note when The Bug happens (look for 'weird' in the debug log).

Author: fireball
Date: Sun Nov 19 20:22:18 2006
New Revision: 24777

URL: http://svn.reactos.org/svn/reactos?rev=24777&view=rev
Log:
- Add a null-check to the IopLoadServiceModule.
- Add a DPRINT1 saying about the possible memory-overwrite bug. This is a hack to get a
bootable tree, but still have a note when The Bug happens (look for 'weird' in the
debug log).

Modified:
    trunk/reactos/ntoskrnl/io/iomgr/driver.c
    trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c

Modified: trunk/reactos/ntoskrnl/io/iomgr/driver.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/iomgr/driver.c…
==============================================================================
--- trunk/reactos/ntoskrnl/io/iomgr/driver.c (original)
+++ trunk/reactos/ntoskrnl/io/iomgr/driver.c Sun Nov 19 20:22:18 2006
@@ -390,6 +390,10 @@
    NTSTATUS Status;
 
    DPRINT("IopLoadServiceModule(%wZ, 0x%p)\n", ServiceName, ModuleObject);
+
+   /* FIXME: This check may be removed once the bug is fixed */
+   if (ServiceName->Buffer == NULL)
+      return STATUS_UNSUCCESSFUL;
 
    /*
     * Get information about the service.

Modified: trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.…
==============================================================================
--- trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c (original)
+++ trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c Sun Nov 19 20:22:18 2006
@@ -2321,6 +2321,10 @@
       PLDR_DATA_TABLE_ENTRY ModuleObject;
       PDRIVER_OBJECT DriverObject;
 
+      /* FIXME: Remove this once the bug is fixed */
+      if (DeviceNode->ServiceName.Buffer == NULL)
+          DPRINT1("Weird DeviceNode %p having ServiceName->Buffer==NULL. Probable
stack corruption or memory overwrite.\n", DeviceNode);
+
       Status = IopLoadServiceModule(&DeviceNode->ServiceName, &ModuleObject);
       if (NT_SUCCESS(Status) || Status == STATUS_IMAGE_ALREADY_LOADED)
       {