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

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1850ac577038b8a16c4f153b9f3177e959f27c82
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=1850ac577038b8a16c4f153b9f...

Author: Alex Henrie 
Date:   Sat Jan 28 15:34:05 2017 -0700

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

Signed-off-by: Alex Henrie 
Signed-off-by: Henri Verbeet 
Signed-off-by: Alexandre Julliard

---

dlls/ddraw/ddraw.c        | 22 +++++++++++++++-------
 dlls/ddraw/tests/ddraw4.c |  2 ++
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/dlls/ddraw/ddraw.c b/dlls/ddraw/ddraw.c
index 1e69df4..ebb2706 100644
--- a/dlls/ddraw/ddraw.c
+++ b/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;
 }
diff --git a/dlls/ddraw/tests/ddraw4.c b/dlls/ddraw/tests/ddraw4.c
index 1ace50a..3aec876 100644
--- a/dlls/ddraw/tests/ddraw4.c
+++ b/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);