[PATCH 4/6] winex11.drv: Zero initialize DEVMODE before passing it to EnumDisplaySettings().

[Zhiyi Zhang]

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 
---
 dlls/winex11.drv/settings.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/winex11.drv/settings.c b/dlls/winex11.drv/settings.c
index a64d1de6500..2d1fc7220de 100644
--- a/dlls/winex11.drv/settings.c
+++ b/dlls/winex11.drv/settings.c
@@ -501,6 +501,7 @@ static LONG get_display_settings(struct x11drv_display_setting **new_displays,

if (!dev_mode)
         {
+            memset(&registry_mode, 0, sizeof(registry_mode));
             registry_mode.dmSize = sizeof(registry_mode);
             if (!EnumDisplaySettingsExW(display_device.DeviceName, ENUM_REGISTRY_SETTINGS, &registry_mode, 0))
                 goto done;
@@ -512,6 +513,7 @@ static LONG get_display_settings(struct x11drv_display_setting **new_displays,
             displays[display_idx].desired_mode = *dev_mode;
             if (!(dev_mode->dmFields & DM_POSITION))
             {
+                memset(&current_mode, 0, sizeof(current_mode));
                 current_mode.dmSize = sizeof(current_mode);
                 if (!EnumDisplaySettingsExW(display_device.DeviceName, ENUM_CURRENT_SETTINGS, &current_mode, 0))
                     goto done;
@@ -522,6 +524,7 @@ static LONG get_display_settings(struct x11drv_display_setting **new_displays,
         }
         else
         {
+            memset(&current_mode, 0, sizeof(current_mode));
             current_mode.dmSize = sizeof(current_mode);
             if (!EnumDisplaySettingsExW(display_device.DeviceName, ENUM_CURRENT_SETTINGS, &current_mode, 0))
                 goto done;

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=76843

Your paranoid android.

=== debiant (32 bit Chinese:China report) ===

user32:
monitor: Timeout

=== debiant (64 bit WoW report) ===

user32:
clipboard.c:760: Test failed: 5: gle 5
clipboard.c:765: Test failed: 5.0: got 0000 instead of 0002
clipboard.c:805: Test failed: 5: gle 1418
clipboard.c:815: Test failed: 5: count 3
clipboard.c:818: Test failed: 5: gle 1418
clipboard.c:853: Test failed: 5.0: formats 00000000 have been rendered
clipboard.c:858: Test failed: 5.0: formats 00000000 have been rendered
clipboard.c:853: Test failed: 5.1: formats 00000000 have been rendered
clipboard.c:858: Test failed: 5.1: formats 00000000 have been rendered
clipboard.c:853: Test failed: 5.2: formats 00000000 have been rendered
clipboard.c:858: Test failed: 5.2: formats 00000000 have been rendered