Zhiyi Zhang : winemac.drv: Zero initialize DEVMODE before passing it to EnumDisplaySettings().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 6185252bbcd0d871c906d78299a4603f623ba4f0
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=6185252bbcd0d871c906d7829...

Author: Zhiyi Zhang <zzhang(a)codeweavers.com>
Date:   Tue Aug 11 18:16:21 2020 +0800

winemac.drv: 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(a)codeweavers.com>
Signed-off-by: Ken Thomases <ken(a)codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>

---

 dlls/winemac.drv/display.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/dlls/winemac.drv/display.c b/dlls/winemac.drv/display.c
index 522ff57d7a..9a80308e89 100644
--- a/dlls/winemac.drv/display.c
+++ b/dlls/winemac.drv/display.c
@@ -847,6 +847,7 @@ LONG CDECL macdrv_ChangeDisplaySettingsEx(LPCWSTR devname, LPDEVMODEW devmode,
 
     if (!devname && !devmode)
     {
+        memset(&default_mode, 0, sizeof(default_mode));
         default_mode.dmSize = sizeof(default_mode);
         if (!EnumDisplaySettingsExW(primary_adapter, ENUM_REGISTRY_SETTINGS, &default_mode, 0))
         {