diff --git a/src/d3d9/d3d9_bridge.cpp b/src/d3d9/d3d9_bridge.cpp
index 19a637f84..cf10e07d3 100644
--- a/src/d3d9/d3d9_bridge.cpp
+++ b/src/d3d9/d3d9_bridge.cpp
@@ -45,6 +45,26 @@ namespace dxvk {
     if (unlikely(dst == nullptr || src == nullptr))
       return D3DERR_INVALIDCALL;
 
+    // CopyRects will not pass a null pSrcRect, but check anyway
+    if (unlikely(pSrcRect == nullptr))
+      return D3DERR_INVALIDCALL;
+
+    // validate dimensions to ensure we calculate a meaningful srcOffset & extent
+    if (unlikely(pSrcRect->left < 0
+              || pSrcRect->top  < 0
+              || pSrcRect->right  <= pSrcRect->left
+              || pSrcRect->bottom <= pSrcRect->top))
+      return D3DERR_INVALIDCALL;
+
+    // CopyRects will not pass a null pDestPoint, but check anyway
+    if (unlikely(pDestPoint == nullptr))
+      return D3DERR_INVALIDCALL;
+
+    // validate dimensions to ensure we caculate a meaningful dstOffset
+    if (unlikely(pDestPoint->x < 0
+              || pDestPoint->y < 0))
+      return D3DERR_INVALIDCALL;
+
     D3D9CommonTexture* srcTextureInfo = src->GetCommonTexture();
     D3D9CommonTexture* dstTextureInfo = dst->GetCommonTexture();
 
@@ -59,13 +79,10 @@ namespace dxvk {
 
     extent = { uint32_t(pSrcRect->right - pSrcRect->left), uint32_t(pSrcRect->bottom - pSrcRect->top), 1 };
 
-    // TODO: Validate extents like in D3D9DeviceEx::UpdateSurface
-
     dstOffset = { pDestPoint->x,
                   pDestPoint->y,
                   0u };
 
-
     m_device->UpdateTextureFromBuffer(
       srcTextureInfo, dstTextureInfo,
       src->GetSubresource(), dst->GetSubresource(),