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user32: Zero initialize DEVMODE before passing it to EnumDisplaySettings(). 

EnumDisplaySettings() on Wine does not write beyond the end of DEVMODE because it doesn't use
dmDriverExtra currently, but this implementation detail should not be relied on.

Signed-off-by: Zhiyi Zhang <zzhang@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zhiyi Zhang 2020-08-11 18:15:55 +08:00 committed by Alexandre Julliard
parent 6d68c38c88
commit 04d1a184e5
1 changed files with 4 additions and 0 deletions
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4
dlls/user32/sysparams.c
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@ -3369,6 +3369,7 @@ LONG WINAPI ChangeDisplaySettingsExW( LPCWSTR devname, LPDEVMODEW devmode, HWND
if (def_mode)
{
memset(&dm, 0, sizeof(dm));
dm.dmSize = sizeof(dm);
if (!EnumDisplaySettingsExW(devname, ENUM_REGISTRY_SETTINGS, &dm, 0))
{
@ -3428,6 +3429,8 @@ BOOL WINAPI EnumDisplaySettingsExA(LPCSTR lpszDeviceName, DWORD iModeNum,
if (lpszDeviceName) RtlCreateUnicodeStringFromAsciiz(&nameW, lpszDeviceName);
else nameW.Buffer = NULL;
memset(&devmodeW, 0, sizeof(devmodeW));
devmodeW.dmSize = sizeof(devmodeW);
ret = EnumDisplaySettingsExW(nameW.Buffer,iModeNum,&devmodeW,dwFlags);
if (ret)
{
@ -4808,6 +4811,7 @@ LONG WINAPI QueryDisplayConfig(UINT32 flags, UINT32 *numpathelements, DISPLAYCON
&type, (BYTE *)device_name, sizeof(device_name), NULL, 0))
goto done;
memset(&devmode, 0, sizeof(devmode));
devmode.dmSize = sizeof(devmode);
if (!EnumDisplaySettingsW(device_name, ENUM_CURRENT_SETTINGS, &devmode))
goto done;