NTSTATUS TCCreateRootDeviceObject (PDRIVER_OBJECT DriverObject)
{
	UNICODE_STRING Win32NameString, ntUnicodeString;
	WCHAR dosname[32], ntname[32];
	PDEVICE_OBJECT DeviceObject;
	NTSTATUS ntStatus;
	BOOL *bRootExtension;

	Dump ("TCCreateRootDeviceObject BEGIN\n");
	ASSERT (KeGetCurrentIrql() == PASSIVE_LEVEL);

	RtlStringCbCopyW (dosname, sizeof(dosname),(LPWSTR) DOS_ROOT_PREFIX);
	RtlStringCbCopyW (ntname, sizeof(ntname),(LPWSTR) NT_ROOT_PREFIX);
	RtlInitUnicodeString (&ntUnicodeString, ntname);
	RtlInitUnicodeString (&Win32NameString, dosname);

	Dump ("Creating root device nt=%ls dos=%ls\n", ntname, dosname);

	ntStatus = IoCreateDevice (
					  DriverObject,
					  sizeof (BOOL),
					  &ntUnicodeString,
					  FILE_DEVICE_UNKNOWN,
					  FILE_DEVICE_SECURE_OPEN,
					  FALSE,
					  &DeviceObject);

	if (!NT_SUCCESS (ntStatus))
	{
		Dump ("TCCreateRootDeviceObject NTSTATUS = 0x%08x END\n", ntStatus);
		return ntStatus;/* Failed to create DeviceObject */
	}

	DeviceObject->Flags |= DO_DIRECT_IO;
	DeviceObject->AlignmentRequirement = FILE_WORD_ALIGNMENT;

	/* Setup the device extension */
	bRootExtension = (BOOL *) DeviceObject->DeviceExtension;
	*bRootExtension = TRUE;

	KeInitializeMutex (&RootDeviceControlMutex, 0);

	ntStatus = IoCreateSymbolicLink (&Win32NameString, &ntUnicodeString);

	if (!NT_SUCCESS (ntStatus))
	{
		Dump ("TCCreateRootDeviceObject NTSTATUS = 0x%08x END\n", ntStatus);
		IoDeleteDevice (DeviceObject);
		return ntStatus;
	}

	IoRegisterShutdownNotification (DeviceObject);
	RootDeviceObject = DeviceObject;

	Dump ("TCCreateRootDeviceObject STATUS_SUCCESS END\n");
	return STATUS_SUCCESS;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.