Rémi Bernon : winewayland: Avoid crashing when the dummy window surface is used.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1e701a6b3798ecfd688ad1ff405dbb62b3d214c6
URL:    https://gitlab.winehq.org/wine/wine/-/commit/1e701a6b3798ecfd688ad1ff405dbb6...

Author: Rémi Bernon 
Date:   Sat Jun 15 18:36:50 2024 +0200

winewayland: Avoid crashing when the dummy window surface is used.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=56840

---

dlls/winewayland.drv/window_surface.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/winewayland.drv/window_surface.c b/dlls/winewayland.drv/window_surface.c
index fb3b8750001..888fa74c085 100644
--- a/dlls/winewayland.drv/window_surface.c
+++ b/dlls/winewayland.drv/window_surface.c
@@ -489,8 +489,12 @@ failed:
 void wayland_window_surface_update_wayland_surface(struct window_surface *window_surface,
                                                    struct wayland_surface *wayland_surface)
 {
-    struct wayland_window_surface *wws = wayland_window_surface_cast(window_surface);
+    struct wayland_window_surface *wws;
+
+    /* ignore calls with the dummy surface */
+    if (window_surface->funcs != &wayland_window_surface_funcs) return;

+    wws = wayland_window_surface_cast(window_surface);
     window_surface_lock(window_surface);

TRACE("surface=%p hwnd=%p wayland_surface=%p\n", wws, window_surface->hwnd, wayland_surface);