winmm: The dwSize paramater of JOYINFOEX must be set correctly.

135f929a · Bruno Jesus · Alexandre Julliard · 3db2e911 · 135f929a
Commit 135f929a authored Dec 11, 2014 by Bruno Jesus Committed by Alexandre Julliard Dec 11, 2014
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joystick.c dlls/winmm/joystick.c +1 -1

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--- a/dlls/winmm/joystick.c
+++ b/dlls/winmm/joystick.c
@@ -220,7 +220,7 @@ MMRESULT WINAPI DECLSPEC_HOTPATCH joyGetPosEx(UINT wID, LPJOYINFOEX lpInfo)
    TRACE("(%d, %p);\n", wID, lpInfo);

    if (!lpInfo) return MMSYSERR_INVALPARAM;
-    if (wID >= MAXJOYSTICK)	return JOYERR_PARMS;
+    if (wID >= MAXJOYSTICK || lpInfo->dwSize < sizeof(JOYINFOEX)) return JOYERR_PARMS;
    if (!JOY_LoadDriver(wID))	return MMSYSERR_NODRIVER;

    lpInfo->dwXpos = 0;