[PATCH] d3d11: Avoid crash in _CopySubresourceRegion[1]() on NULL resources.

[Paul Gofman]

Marvel's Avengers randomly hits this case.

Signed-off-by: Paul Gofman <pgofman at codeweavers.com>
---
 dlls/d3d11/device.c      | 9 +++++++++
 dlls/d3d11/tests/d3d11.c | 5 +++++
 2 files changed, 14 insertions(+)

diff --git a/dlls/d3d11/device.c b/dlls/d3d11/device.c
index 0508fa3f7b2..2a68e025852 100644
--- a/dlls/d3d11/device.c
+++ b/dlls/d3d11/device.c
@@ -965,6 +965,9 @@ static void STDMETHODCALLTYPE d3d11_immediate_context_CopySubresourceRegion(ID3D
             iface, dst_resource, dst_subresource_idx, dst_x, dst_y, dst_z,
             src_resource, src_subresource_idx, src_box);
 
+    if (!dst_resource || !src_resource)
+        return;
+
     if (src_box)
         wined3d_box_set(&wined3d_src_box, src_box->left, src_box->top,
                 src_box->right, src_box->bottom, src_box->front, src_box->back);
@@ -2438,6 +2441,9 @@ static void STDMETHODCALLTYPE d3d11_immediate_context_CopySubresourceRegion1(ID3
             iface, dst_resource, dst_subresource_idx, dst_x, dst_y, dst_z,
             src_resource, src_subresource_idx, src_box, flags);
 
+    if (!dst_resource || !src_resource)
+        return;
+
     if (src_box)
         wined3d_box_set(&wined3d_src_box, src_box->left, src_box->top,
                 src_box->right, src_box->bottom, src_box->front, src_box->back);
@@ -4507,6 +4513,9 @@ static void STDMETHODCALLTYPE d3d10_device_CopySubresourceRegion(ID3D10Device1 *
             iface, dst_resource, dst_subresource_idx, dst_x, dst_y, dst_z,
             src_resource, src_subresource_idx, src_box);
 
+    if (!dst_resource || !src_resource)
+        return;
+
     if (src_box)
         wined3d_box_set(&wined3d_src_box, src_box->left, src_box->top,
                 src_box->right, src_box->bottom, src_box->front, src_box->back);
diff --git a/dlls/d3d11/tests/d3d11.c b/dlls/d3d11/tests/d3d11.c
index d25113ff648..67d843ae9e5 100644
--- a/dlls/d3d11/tests/d3d11.c
+++ b/dlls/d3d11/tests/d3d11.c
@@ -12708,6 +12708,11 @@ static void test_copy_subresource_region(void)
 
     ID3D11DeviceContext_ClearRenderTargetView(context, test_context.backbuffer_rtv, red);
 
+    ID3D11DeviceContext_CopySubresourceRegion(context, (ID3D11Resource *)dst_texture, 0,
+            1, 1, 0, NULL, 0, &box);
+    ID3D11DeviceContext_CopySubresourceRegion(context, NULL, 0,
+            1, 1, 0, (ID3D11Resource *)src_texture, 0, &box);
+
     set_box(&box, 0, 0, 0, 2, 2, 1);
     ID3D11DeviceContext_CopySubresourceRegion(context, (ID3D11Resource *)dst_texture, 0,
             1, 1, 0, (ID3D11Resource *)src_texture, 0, &box);
-- 
2.26.2