Re: [PATCH v3 0/1] MR9743: winegstreamer: Support dynamic reconnection in the DirectShow transform.

[Bernhard Übelacker (＠bernhardu)]

Bernhard Übelacker (@bernhardu) commented about dlls/winegstreamer/quartz_transform.c:
> +            TRACE("Executing dynamic format change. Current format:\n");
> +            strmbase_dump_media_type(&filter->source_mt);
> +            TRACE("New format:\n");
> +            strmbase_dump_media_type(mt);
> +
> +            FreeMediaType(&filter->source_mt);
> +            filter->source_mt = *mt;
> +            CoTaskMemFree(mt);
> +
> +            wg_transform_destroy(filter->transform);
> +            if (FAILED(hr = wg_transform_create_quartz(&filter->sink.pin.mt,
> +                    &filter->source_mt, &attrs, &filter->transform)))
> +                ERR("Failed to recreate transform, hr %#lx.\n", hr);
>          }
>
> +        DeleteMediaType(mt);
> Hello, I received this [ASan report](https://gitlab.winehq.org/bernhardu/wine/-/jobs/216551#L5530), which looks like the `DeleteMediaType` accesses memory which got freed by the `CoTaskMemFree` a few lines before.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9743#note_125359