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

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 135f929a39e10ca1b373bcbd5a1400b7aecd7545
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=135f929a39e10ca1b373bcbd5a1400b7aecd7545

Author: Bruno Jesus <00cpxxx at gmail.com>
Date:   Thu Dec 11 02:53:48 2014 -0200

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

---

 dlls/winmm/joystick.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winmm/joystick.c b/dlls/winmm/joystick.c
index 9c06fc2..f4870fe 100644
--- 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;