[Mesa-stable] [PATCH] Check for NULL native_window into eglCreateWindowSurface()

[Sinclair Yeh]

v2:
Incorporated feedback from idr - moved the check to a higher level
function.

v1:
We have customers using NULL as a way to test the robustness of
the API.  Without this check, EGL will segfault trying to
dereference dri2_surf->wl_win->private because wl_win is
NULL.

This fix adds a check and sets EGL_BAD_NATIVE_WINDOW

Cc: "10.1 10.2" <mesa-stable at lists.freedesktop.org>
---
 src/egl/main/eglapi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index 7846814..096c3d8 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -571,6 +571,10 @@ _eglCreateWindowSurfaceCommon(_EGLDisplay *disp, EGLConfig config,
    EGLSurface ret;
 
    _EGL_CHECK_CONFIG(disp, conf, EGL_NO_SURFACE, drv);
+
+   if (native_window == NULL)
+      RETURN_EGL_ERROR(disp, EGL_BAD_NATIVE_WINDOW, EGL_NO_SURFACE);
+
    surf = drv->API.CreateWindowSurface(drv, disp, conf, native_window,
                                        attrib_list);
    ret = (surf) ? _eglLinkSurface(surf) : EGL_NO_SURFACE;
-- 
1.9.1