[PATCH v3 1/4] winmm: Always allocate at least MAX_PATH bytes in mmioOpenW().

[Andrew Eikum]

Signed-off-by: Andrew Eikum <aeikum at codeweavers.com>

On Thu, Dec 17, 2020 at 04:40:48PM -0600, Zebediah Figura wrote:
> Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
> ---
>  dlls/winmm/mmio.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/dlls/winmm/mmio.c b/dlls/winmm/mmio.c
> index 48bbd3ed48d..cb3175c5cd7 100644
> --- a/dlls/winmm/mmio.c
> +++ b/dlls/winmm/mmio.c
> @@ -734,6 +734,7 @@ HMMIO WINAPI mmioOpenW(LPWSTR szFileName, MMIOINFO* lpmmioinfo,
>      if (szFileName)
>      {
>          INT     len = WideCharToMultiByte( CP_ACP, 0, szFileName, -1, NULL, 0, NULL, NULL );
> +        if (len < MAX_PATH) len = MAX_PATH;
>          szFn = HeapAlloc( GetProcessHeap(), 0, len );
>          if (!szFn) return NULL;
>          WideCharToMultiByte( CP_ACP, 0, szFileName, -1, szFn, len, NULL, NULL );
> -- 
> 2.29.2
> 
>