From b362a62a7ecb59367f22e86cb216e238202b873b Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Tue, 22 Jun 2010 15:53:52 +0000
Subject: [PATCH] [NTOSKRNL] - Check that the caller passed a valid PDO pointer
 to IoOpenDeviceRegistryKey

svn path=/trunk/; revision=47827
---
 reactos/ntoskrnl/io/pnpmgr/pnpmgr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c b/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
index 9d130eca9df..06f1405045d 100644
--- a/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
+++ b/reactos/ntoskrnl/io/pnpmgr/pnpmgr.c
@@ -3528,6 +3528,8 @@ IoOpenDeviceRegistryKey(IN PDEVICE_OBJECT DeviceObject,
    else
    {
       DeviceNode = IopGetDeviceNode(DeviceObject);
+      if (!DeviceNode)
+          return STATUS_INVALID_DEVICE_REQUEST;
       KeyNameLength += sizeof(EnumKeyName) - sizeof(UNICODE_NULL) +
                        DeviceNode->InstancePath.Length;
    }