winmm: Always allocate at least MAX_PATH bytes in mmioOpenW().

Signed-off-by: Zebediah Figura <z.figura12@gmail.com> Signed-off-by: Andrew Eikum <aeikum@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

winmm: Always allocate at least MAX_PATH bytes in mmioOpenW().
b9407f75 · Zebediah Figura · Alexandre Julliard · 8a22d287 · b9407f75
Commit b9407f75 authored Dec 17, 2020 by Zebediah Figura Committed by Alexandre Julliard Dec 18, 2020
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mmio.c dlls/winmm/mmio.c +1 -0

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--- 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 );