8000 gh-92888: Fix memoryview bad `__index__` use after free by Fidget-Spinner · Pull Request #92946 · python/cpython · GitHub
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gh-92888: Fix memoryview bad __index__ use after free #92946

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Merged
merged 12 commits into from
Jun 17, 2022
Merged

gh-92888: Fix memoryview bad __index__ use after free #92946

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73ffb29
Fix memoryview bad `__index__` use after free
Fidget-Spinner May 19, 2022
3581de7
📜🤖 Added by blurb_it.
blurb-it[bot] May 19, 2022
43c66d6
stylistic nits
Fidget-Spinner May 19, 2022
18b921f
Merge branch 'fix_memoryview_auf' of https://github.com/Fidget-Spinne…
Fidget-Spinner May 20, 2022
2f3c04f
Fix whitespace
Fidget-Spinner May 21, 2022
a250b02
Use more comprehensive tests by Serhiy
Fidget-Spinner May 23, 2022
c818990
Add more tests by Serhiy
Fidget-Spinner May 23, 2022
42a706c
Fix newline
Fidget-Spinner May 23, 2022
b650764
Fix for tuple index
Fidget-Spinner May 23, 2022
47bd91f
Address review
Fidget-Spinner May 23, 2022
6890713
Address Victor's review
Fidget-Spinner May 29, 2022
d3edf74
re-add ba=None
Fidget-Spinner May 30, 2022
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Add more tests by Serhiy 
Co-Authored-By: Serhiy Storchaka <3659035+serhiy-storchaka@users.noreply.github.com>
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@Fidget-Spinner @serhiy-storchaka
Fidget-Spinner and serhiy-storchaka committed May 23, 2022
commit c818990bec7eca524a8cc6d35b859fd54f8bc303
18 changes: 18 additions & 0 deletions Lib/test/test_memoryview.py
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Original file line number Diff line number Diff line change
Expand Up @@ -577,6 +577,13 @@ def __bool__(self):
m = memoryview(bytearray(b'\xff'*size))
self.assertEqual(list(m[MyIndex():8]), [255] * 4)

ba = None
m = memoryview(bytearray(b'\xff'*size)).cast('B', (64, 2))
self.assertEqual(m[MyIndex(), 0], 0)
ba = None
m = memoryview(bytearray(b'\xff'*size)).cast('B', (2, 64))
self.assertEqual(m[0, MyIndex()], 0)

ba = None
m = memoryview(bytearray(b'\xff'*size))
with self.assertRaisesRegex(ValueError, "operation forbidden"):
Expand All @@ -595,6 +602,17 @@ def __bool__(self):
m[MyIndex():8] = b'spam'
self.assertEqual(ba[:8], b'\0'*8)

ba = None
m = memoryview(bytearray(b'\xff'*size)).cast('B', (64, 2))
with self.assertRaisesRegex(ValueError, "operation forbidden"):
m[MyIndex(), 0] = 42
self.assertEqual(ba[8:16], b'\0'*8)
ba = None
m = memoryview(bytearray(b'\xff'*size)).cast('B', (2, 64))
with self.assertRaisesRegex(ValueError, "operation forbidden"):
m[0, MyIndex()] = 42
self.assertEqual(ba[:8], b'\0'*8)

ba = None
m = memoryview(bytearray(b'\xff'*size))
with self.assertRaisesRegex(ValueError, "operation forbidden"):
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