Mesa (master): vulkan/wsi/x11: don't crash on null visual

[Jason Ekstrand]

Module: Mesa
Branch: master
Commit: 01dd363e671ac3a457bc3ff60b43b04e108c33fc
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=01dd363e671ac3a457bc3ff60b43b04e108c33fc

Author: Arda Coskunses <acoskunses at gmail.com>
Date:   Thu Dec 22 14:55:03 2016 -0700

vulkan/wsi/x11: don't crash on null visual

When application window closed unexpectedly due to
lost window visualtypes getting invlaid parameters
which is causing a crash. Necessary check is added
to prevent the crash.

Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Cc: "13.0" <mesa-stable at lists.freedesktop.org>

---

 src/vulkan/wsi/wsi_common_x11.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/vulkan/wsi/wsi_common_x11.c b/src/vulkan/wsi/wsi_common_x11.c
index 25ba0c1..037aa50 100644
--- a/src/vulkan/wsi/wsi_common_x11.c
+++ b/src/vulkan/wsi/wsi_common_x11.c
@@ -349,6 +349,9 @@ x11_surface_get_capabilities(VkIcdSurfaceBase *icd_surface,
    xcb_visualtype_t *visual =
       get_visualtype_for_window(conn, window, &visual_depth);
 
+   if (!visual)
+      return VK_ERROR_SURFACE_LOST_KHR;
+
    geom = xcb_get_geometry_reply(conn, geom_cookie, &err);
    if (geom) {
       VkExtent2D extent = { geom->width, geom->height };