[PATCH 1/1] vkd3d: Handle the case where a descriptor is null and is concurrently written non-null.

[Conor McCarthy]

From: Conor McCarthy

If view is null and the comparison (view == src->s.u.object) is false,
vkd3d_view_decref will be called on null.
---
 libs/vkd3d/vkd3d_private.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libs/vkd3d/vkd3d_private.h b/libs/vkd3d/vkd3d_private.h
index 3be12be7..a5eed59a 100644
--- a/libs/vkd3d/vkd3d_private.h
+++ b/libs/vkd3d/vkd3d_private.h
@@ -882,8 +882,9 @@ static inline void *d3d12_desc_get_object_ref(const volatile struct d3d12_desc *
     {
         do
         {
-            view = src->s.u.object;
-        } while (view && !vkd3d_view_incref(view));
+            if (!(view = src->s.u.object))
+                return NULL;
+        } while (!vkd3d_view_incref(view));

/* Check if the object is still in src to handle the case where it was
          * already freed and reused elsewhere when the refcount was incremented. */