用ObQueryNameString总蓝屏，代码如下：
麻烦大家帮帮忙看看有什么问题，或者有没有其他方法来做。
BOOLEAN GetRegistryObjectCompleteName1(PUNICODE_STRING pRegistryPath, PUNICODE_STRING pPartialRegistryPath, PVOID pKey)
{
BOOLEAN getCompleteName = FALSE;
PUNICODE_STRING fullName = NULL;
ULONG actualLen;
NTSTATUS status;

status = ObQueryNameString( pKey, (POBJECT_NAME_INFORMATION)fullName, 0, &actualLen );
if(status == STATUS_INFO_LENGTH_MISMATCH)
{
    fullName = ExAllocatePoolWithTag(NonPagedPool, actualLen,REGISTRY_POOL_TAG);
    status = ObQueryNameString( pKey, (POBJECT_NAME_INFORMATION)fullName, actualLen, &actualLen );
    if(NT_SUCCESS(status))
    {
        RtlUnicodeStringCopy(pRegistryPath, fullName);
        getCompleteName = TRUE;
    }
    else
    {
        KdPrint(("Error %x getting QueryNameString.\n"));
    }
        ExFreePoolWithTag(fullName,REGISTRY_POOL_TAG);
}

        return getCompleteName;
}

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