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| author | Zackery Spytz <zspytz@gmail.com> | 2019-05-17 07:13:03 (GMT) |
|---|---|---|
| committer | Serhiy Storchaka <storchaka@gmail.com> | 2019-05-17 07:13:03 (GMT) |
| commit | 14514d9084a40f599c57da853a305aa264562a43 (patch) | |
| tree | 36cb61b74dbfda9ce1cdf72a864b640d0bda546d /Lib/test/test_mmap.py | |
| parent | 870b035bc6da96689b59dd6f79782ec6f1873617 (diff) | |
| download | cpython-14514d9084a40f599c57da853a305aa264562a43.zip cpython-14514d9084a40f599c57da853a305aa264562a43.tar.gz cpython-14514d9084a40f599c57da853a305aa264562a43.tar.bz2 | |
bpo-36946: Fix possible signed integer overflow when handling slices. (GH-13375)
The final addition (cur += step) may overflow, so use size_t for "cur".
"cur" is always positive (even for negative steps), so it is safe to use
size_t here.
Co-Authored-By: Martin Panter <vadmium+py@gmail.com>
Diffstat (limited to 'Lib/test/test_mmap.py')
| -rw-r--r-- | Lib/test/test_mmap.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Lib/test/test_mmap.py b/Lib/test/test_mmap.py index dd857a0..495d24a 100644 --- a/Lib/test/test_mmap.py +++ b/Lib/test/test_mmap.py @@ -439,7 +439,7 @@ class MmapTests(unittest.TestCase): m = mmap.mmap(-1, len(s)) m[:] = s self.assertEqual(m[:], s) - indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300) + indices = (0, None, 1, 3, 19, 300, sys.maxsize, -1, -2, -31, -300) for start in indices: for stop in indices: # Skip step 0 (invalid) @@ -451,7 +451,7 @@ class MmapTests(unittest.TestCase): # Test extended slicing by comparing with list slicing. s = bytes(reversed(range(256))) m = mmap.mmap(-1, len(s)) - indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300) + indices = (0, None, 1, 3, 19, 300, sys.maxsize, -1, -2, -31, -300) for start in indices: for stop in indices: # Skip invalid step 0 |