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[WIN32K] Deny deviceless calls to EngDeviceIoControl

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This fixes BSOD happening in ntoskrnl coming from win32k under certain
conditions with 3rd party display drivers (such as VBox or VMware)
This commit is contained in:
Pierre Schweitzer 2018-12-31 20:33:59 +01:00
parent 5da008c338
commit 01b580d876
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1 changed files with 5 additions and 0 deletions
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5
win32ss/gdi/eng/device.c
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@ -485,6 +485,11 @@ EngDeviceIoControl(
TRACE("EngDeviceIoControl() called\n");
if (!hDevice)
{
return ERROR_INVALID_HANDLE;
}
KeInitializeEvent(&Event, SynchronizationEvent, FALSE);
DeviceObject = (PDEVICE_OBJECT) hDevice;