ddraw: Don't crash if writing out a new ddraw4 surface segfaults.

dlls/ddraw/ddraw.c

@@ -2868,15 +2868,23 @@ static HRESULT WINAPI ddraw4_CreateSurface(IDirectDraw4 *iface,
 
     hr = ddraw_surface_create(ddraw, surface_desc, &impl, outer_unknown, 4);
     wined3d_mutex_unlock();
-    if (FAILED(hr))
+
+    __TRY
     {
-        *surface = NULL;
-        return hr;
+        if (FAILED(hr))
+        {
+            *surface = NULL;
+            break;
+        }
+        *surface = &impl->IDirectDrawSurface4_iface;
+        IDirectDraw4_AddRef(iface);
+        impl->ifaceToRelease = (IUnknown *)iface;
     }
-
-    *surface = &impl->IDirectDrawSurface4_iface;
-    IDirectDraw4_AddRef(iface);
-    impl->ifaceToRelease = (IUnknown *)iface;
+    __EXCEPT_PAGE_FAULT
+    {
+        hr = E_INVALIDARG;
+    }
+    __ENDTRY;
 
     return hr;
 }

dlls/ddraw/tests/ddraw4.c

@@ -2267,6 +2267,8 @@ static void test_surface_qi(void)
     surface_desc.ddsCaps.dwCaps = DDSCAPS_TEXTURE;
     surface_desc.dwWidth = 512;
     surface_desc.dwHeight = 512;
+    hr = IDirectDraw4_CreateSurface(ddraw, &surface_desc, (IDirectDrawSurface4 **)0xdeadbeef, NULL);
+    ok(hr == E_INVALIDARG, "Got unexpected hr %#x.\n", hr);
     hr = IDirectDraw4_CreateSurface(ddraw, &surface_desc, &surface, NULL);
     ok(SUCCEEDED(hr), "Failed to create surface, hr %#x.\n", hr);