DXGI interfaces are released before their last use in Generic::getVendorId

Problem

Generic::getVendorId releases both acquired COM interfaces before using them:

IDXGIDevice* dxgiDevice{};
if (SUCCEEDED(((IUnknown*)m_typelessDevice)->QueryInterface(&dxgiDevice)))
{
    dxgiDevice->Release();
    IDXGIAdapter* adapter{};
    if (SUCCEEDED(dxgiDevice->GetAdapter(&adapter)))
    {
        adapter->Release();
        DXGI_ADAPTER_DESC desc;
        if (SUCCEEDED(adapter->GetDesc(&desc)))

Source: generic.cpp at e8aaa6e. The same pattern is present on current main.

An outstanding reference to the original device does not guarantee that a separately acquired interface wrapper remains alive. COM permits independently managed tear-off interfaces; the returned pointer must remain owned until its final use. See Microsoft's reference-counting guidance.

This permits use-after-release at dxgiDevice->GetAdapter and independently at adapter->GetDesc, even if conventional native implementations happen to retain those objects internally.

Proposed fix

Keep both acquired references until scope exit using the existing WRL ComPtr convention. This preserves the HRESULT checks, return values, and unchanged output on failure, while releasing each reference on all exits.

A focused fix is available in northaxosky/Streamline commit 2e83322: one file, five insertions and six deletions. I attempted to submit it as a PR, but this repository currently has pull requests disabled.

Validation and limits

The modified translation unit compiled with MSVC. A local source-extracted lifetime harness exercises the success/error paths and independently reference-counted interface test doubles; retaining the interfaces removes its lifetime violations. This is a focused ownership check, not a full COM conformance or SDK integration test.

A full SDK build was not completed in this environment. Investigation began after a RenderDoc-enabled D3D11 application encountered an exception during Streamline device registration, but exact attribution of that application exception to this function has not been established. This report stands on the source-level ownership defect, not a claimed reproduction of that particular crash. No application binaries, captures, or crash dumps are attached.

Start in source/platforms/sl.chi/generic.cpp at Generic::getVendorId, around lines 349-367, and inspect the existing WRL ComPtr convention. Keep the acquired DXGI interfaces owned through their final uses, preserving the HRESULT checks and failure behavior. Validate with the focused lifetime harness or by compiling the modified translation unit with MSVC.