[janderwald] 57615: [NTOSKRNL] - Dereference the correct device object in the power completion routine - Fixes crash with ftdibus.sys

Author: janderwald
Date: Thu Oct 25 14:27:02 2012
New Revision: 57615

URL: http://svn.reactos.org/svn/reactos?rev=57615&view=rev
Log:
[NTOSKRNL]
- Dereference the correct device object in the power completion routine
- Fixes crash with ftdibus.sys

Modified:
    trunk/reactos/ntoskrnl/po/power.c

Modified: trunk/reactos/ntoskrnl/po/power.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/po/power.c?rev=576...
==============================================================================
--- trunk/reactos/ntoskrnl/po/power.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/po/power.c [iso-8859-1] Thu Oct 25 14:27:02 2012
@@ -21,6 +21,7 @@
     PREQUEST_POWER_COMPLETE CompletionRoutine;
     POWER_STATE PowerState;
     PVOID Context;
+    PDEVICE_OBJECT TopDeviceObject;
 } REQUEST_POWER_ITEM, *PREQUEST_POWER_ITEM;

typedef struct _POWER_STATE_TRAVERSE_CONTEXT
@@ -56,10 +57,10 @@
                                         RequestPowerItem->Context,
                                         &Irp->IoStatus);

+    IoFreeIrp(Irp);
+
+    ObDereferenceObject(RequestPowerItem->TopDeviceObject);
     ExFreePool(Context);
-
-    IoFreeIrp(Irp);
-    ObDereferenceObject(DeviceObject);

return STATUS_MORE_PROCESSING_REQUIRED;
 }
@@ -573,6 +574,7 @@
     RequestPowerItem->CompletionRoutine = CompletionFunction;
     RequestPowerItem->PowerState = PowerState;
     RequestPowerItem->Context = Context;
+    RequestPowerItem->TopDeviceObject = TopDeviceObject;

if (pIrp != NULL)
         *pIrp = Irp;