NTSTATUS TCStartVolumeThread (PDEVICE_OBJECT DeviceObject, PEXTENSION Extension, MOUNT_STRUCT * mount)
{
	PTHREAD_BLOCK pThreadBlock = TCalloc (sizeof (THREAD_BLOCK));
	HANDLE hThread;
	NTSTATUS ntStatus;
	OBJECT_ATTRIBUTES threadObjAttributes;
	SECURITY_QUALITY_OF_SERVICE qos;

	Dump ("Starting thread...\n");

	if (pThreadBlock == NULL)
	{
		return STATUS_INSUFFICIENT_RESOURCES;
	}
	else
	{
		pThreadBlock->DeviceObject = DeviceObject;
		pThreadBlock->mount = mount;
	}

	qos.Length = sizeof (qos);
	qos.ContextTrackingMode = SECURITY_STATIC_TRACKING;
	qos.EffectiveOnly = TRUE;
	qos.ImpersonationLevel = SecurityImpersonation;

	ntStatus = SeCreateClientSecurity (PsGetCurrentThread(), &qos, FALSE, &Extension->SecurityClientContext);
	if (!NT_SUCCESS (ntStatus))
		goto ret;

	Extension->SecurityClientContextValid = TRUE;

	Extension->bThreadShouldQuit = FALSE;

	InitializeObjectAttributes (&threadObjAttributes, NULL, OBJ_KERNEL_HANDLE, NULL, NULL);

	ntStatus = PsCreateSystemThread (&hThread,
					 THREAD_ALL_ACCESS,
					 &threadObjAttributes,
					 NULL,
					 NULL,
					 VolumeThreadProc,
					 pThreadBlock);

	if (!NT_SUCCESS (ntStatus))
	{
		Dump ("PsCreateSystemThread Failed END\n");
		goto ret;
	}

	ntStatus = ObReferenceObjectByHandle (hThread,
				   THREAD_ALL_ACCESS,
				   NULL,
				   KernelMode,
				   &Extension->peThread,
				   NULL);

	ZwClose (hThread);

	if (!NT_SUCCESS (ntStatus))
		goto ret;

	Dump ("Waiting for thread to initialize...\n");

	KeWaitForSingleObject (&Extension->keCreateEvent,
			       Executive,
			       KernelMode,
			       FALSE,
			       NULL);

	Dump ("Waiting completed! Thread returns 0x%08x\n", pThreadBlock->ntCreateStatus);
	ntStatus = pThreadBlock->ntCreateStatus;

ret:
	TCfree (pThreadBlock);
	return ntStatus;
}

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.