Add decompression bomb check when loading WmfStubImageFile at a different DPI (#9984)

Author: hugovk

Tests/test_file_wmf.py

@@ -118,9 +118,13 @@ def test_load_set_dpi() -> None:
 
     with Image.open("Tests/images/drawing.emf") as im:
         assert im.size == (1625, 1625)
+        assert isinstance(im, WmfImagePlugin.WmfStubImageFile)
+        with pytest.raises(Image.DecompressionBombError):
+            im.load(20000)
 
-        if not hasattr(Image.core, "drawwmf"):
-            return
+    if not hasattr(Image.core, "drawwmf"):
+        return
+    with Image.open("Tests/images/drawing.emf") as im:
         assert isinstance(im, WmfImagePlugin.WmfStubImageFile)
         im.load(im.info["dpi"])
         assert im.size == (1625, 1625)

src/PIL/WmfImagePlugin.py

@@ -128,6 +128,7 @@ def load(
                 int((x1 - x0) * dpi[0] / self._inch[0]),
                 int((y1 - y0) * dpi[1] / self._inch[1]),
             )
+            Image._decompression_bomb_check(self.size)
         return super().load()