Re: [PATCH v6 0/7] MR1180: Make all kernel callbacks go through user32

[Jacek Caban (＠jacek)]

Jacek Caban (@jacek) commented about dlls/wow64win/user.c:
> return TRUE;
>  }
>
> +static NTSTATUS WINAPI wow64_NtUserDispatchCallback( void *arg, ULONG size )
> +{
> +    struct user32_callback_params *params = arg;
> +    struct user32_callback_params32 params32;
> +
> +    params32.func = (ULONG)(ULONG_PTR)params->func;
> +    params32.args = (ULONG)(ULONG_PTR)params->args;

You can't do that, params->args may be a 64-bit pointer.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/1180#note_12539