Index: /trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/VBoxMPWddm.cpp
===================================================================
--- /trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/VBoxMPWddm.cpp	(revision 51919)
+++ /trunk/src/VBox/Additions/WINNT/Graphics/Video/mp/wddm/VBoxMPWddm.cpp	(revision 51920)
@@ -49,5 +49,6 @@
 {
     PVOID pvMem = vboxWddmMemAlloc(cbSize);
-    memset(pvMem, 0, cbSize);
+    if (pvMem)
+        memset(pvMem, 0, cbSize);
     return pvMem;
 }
@@ -2322,4 +2323,9 @@
 
     PVBOXWDDM_DEVICE pDevice = (PVBOXWDDM_DEVICE)vboxWddmMemAllocZero(sizeof (VBOXWDDM_DEVICE));
+    if (!pDevice)
+    {
+        WARN(("vboxWddmMemAllocZero failed for WDDM device structure"));
+        return STATUS_NO_MEMORY;
+    }
     pCreateDevice->hDevice = pDevice;
     if (pCreateDevice->Flags.SystemDevice)