Vulnerable map function is not called on windows

PIL/ImageFile.py

@@ -154,7 +154,7 @@ class ImageFile(Image.Image):
             if d == "raw" and a[0] == self.mode and a[0] in Image._MAPMODES:
                 try:
                     if hasattr(Image.core, "map"):
-                        # use built-in mapper
+                        # use built-in mapper  WIN32 only
                         self.map = Image.core.map(self.filename)
                         self.map.seek(o)
                         self.im = self.map.readimage(

Tests/test_map.py

@@ -1,7 +1,10 @@
 from helper import PillowTestCase, unittest
+import sys
 
 from PIL import Image
 
+
+@unittest.skipIf(sys.platform.startswith('win32'), "Win32 does not call map_buffer")
 class TestMap(PillowTestCase):
     def test_overflow(self):
         # There is the potential to overflow comparisons in map.c