[pschweitzer] 47828: [NTOSKRNL] Add a macro to check for a valid PDO and use it in IoOpenDeviceRegistryKey(). Requested by sir_richard.

Author: pschweitzer
Date: Tue Jun 22 18:47:22 2010
New Revision: 47828

URL: http://svn.reactos.org/svn/reactos?rev=47828&view=rev
Log:
[NTOSKRNL]
Add a macro to check for a valid PDO and use it in IoOpenDeviceRegistryKey().
Requested by sir_richard.

Modified:
    trunk/reactos/ntoskrnl/include/internal/io.h
    trunk/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c

Modified: trunk/reactos/ntoskrnl/include/internal/io.h
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/include/internal/…
==============================================================================
--- trunk/reactos/ntoskrnl/include/internal/io.h [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/include/internal/io.h [iso-8859-1] Tue Jun 22 18:47:22 2010
@@ -207,6 +207,16 @@
         (_DeviceNode);                                  \
     (_DeviceTreeTraverseContext)->Action = (_Action);   \
     (_DeviceTreeTraverseContext)->Context = (_Context); }
+
+/*
+ * BOOLEAN
+ * IopIsValidPhysicalDeviceObject(
+ *   IN PDEVICE_OBJECT PhysicalDeviceObject);
+ */
+#define IopIsValidPhysicalDeviceObject(PhysicalDeviceObject)                             
                              \
+        (((PEXTENDED_DEVOBJ_EXTENSION)PhysicalDeviceObject) &&                   
                                      \
+       
(((PEXTENDED_DEVOBJ_EXTENSION)PhysicalDeviceObject->DeviceObjectExtension)->DeviceNode)
&&                      \
+       
(((PEXTENDED_DEVOBJ_EXTENSION)PhysicalDeviceObject->DeviceObjectExtension)->DeviceNode->Flags
& DNF_ENUMERATED))
 
 //
 // Device List Operations

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 Jun 22 18:47:22 2010
@@ -3527,9 +3527,9 @@
    }
    else
    {
+      if (!IopIsValidPhysicalDeviceObject(DeviceObject))
+          return STATUS_INVALID_DEVICE_REQUEST;
       DeviceNode = IopGetDeviceNode(DeviceObject);
-      if (!DeviceNode)
-          return STATUS_INVALID_DEVICE_REQUEST;
       KeyNameLength += sizeof(EnumKeyName) - sizeof(UNICODE_NULL) +
                        DeviceNode->InstancePath.Length;
    }