[cgutman] 56063: [NTOSKRNL] - Fix several driver object reference leaks - Fix a kmtest regarding previously loaded drivers - Part 1 of getting PnP driver unload to work properly

Author: cgutman
Date: Tue Mar  6 21:07:25 2012
New Revision: 56063

URL: http://svn.reactos.org/svn/reactos?rev=56063&view=rev
Log:
[NTOSKRNL]
- Fix several driver object reference leaks
- Fix a kmtest regarding previously loaded drivers
- Part 1 of getting PnP driver unload to work properly

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 [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/iomgr/driver.c [iso-8859-1] Tue Mar  6 21:07:25 2012
@@ -558,6 +558,7 @@
         Filters += (ServiceName.Length / sizeof(WCHAR)) + 1)
    {
       DPRINT("Filter Driver: %S (%wZ)\n", Filters,
&DeviceNode->InstancePath);
+
       ServiceName.Buffer = Filters;
       ServiceName.MaximumLength =
       ServiceName.Length = (USHORT)wcslen(Filters) * sizeof(WCHAR);
@@ -579,8 +580,9 @@
        }
 
        Status = IopInitializeDevice(DeviceNode, DriverObject);
-       if (!NT_SUCCESS(Status))
-           continue;
+
+       /* Remove extra reference */
+       ObDereferenceObject(DriverObject);
    }
 
    return STATUS_SUCCESS;
@@ -874,6 +876,9 @@
    {
       Status = IopStartDevice(DeviceNode);
    }
+
+   /* Remove extra reference from IopInitializeDriverModule */
+   ObDereferenceObject(DriverObject);
 
    return Status;
 }
@@ -1960,6 +1965,7 @@
    else
    {
       DPRINT("DriverObject already exist in ObjectManager\n");
+      Status = STATUS_IMAGE_ALREADY_LOADED;
 
       /* IopGetDriverObject references the DriverObject, so dereference it */
       ObDereferenceObject(DriverObject);

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 [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c [iso-8859-1] Tue Mar  6 21:07:25 2012
@@ -2592,19 +2592,9 @@
 
          if (NT_SUCCESS(Status) || Status == STATUS_IMAGE_ALREADY_LOADED)
          {
-            /* STATUS_IMAGE_ALREADY_LOADED means this driver
-               was loaded by the bootloader */
-            if ((Status != STATUS_IMAGE_ALREADY_LOADED) ||
-                (Status == STATUS_IMAGE_ALREADY_LOADED && !DriverObject))
-            {
-               /* Initialize the driver */
-               Status = IopInitializeDriverModule(DeviceNode, ModuleObject,
+            /* Initialize the driver */
+            Status = IopInitializeDriverModule(DeviceNode, ModuleObject,
                   &DeviceNode->ServiceName, FALSE, &DriverObject);
-            }
-            else
-            {
-               Status = STATUS_SUCCESS;
-            }
          }
          else
          {
@@ -2618,6 +2608,9 @@
       {
           /* Initialize the device, including all filters */
           Status = PipCallDriverAddDevice(DeviceNode, FALSE, DriverObject);
+
+          /* Remove the extra reference */
+          ObDereferenceObject(DriverObject);
       }
       else
       {