bpo-36531: Only count number of members once in PyType_FromSpec #12691
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This is such a small change that no NEWS is needed. |
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@DinoV: Please replace |
CuriousLearner
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May 7, 2019
* master: (1204 commits) bpo-31855: unittest.mock.mock_open() results now respects the argument of read([size]) (pythonGH-11521) Forbid creating of stream objects outside of asyncio (python#13101) bpo-35925: Skip SSL tests that fail due to weak external certs. (pythonGH-13124) Fix rst formatting for several links in ssl documentation (pythonGH-13133) bpo-36542: Allow to overwrite the signature for Python functions. (pythonGH-12705) bpo-36793: Remove unneeded __str__ definitions. (pythonGH-13081) bpo-36766: Typos in docs and code comments (pythonGH-13116) bpo-36275: enhance documentation for venv.create() (pythonGH-13114) Clarify the download unit in the download section (pythonGH-13122) bpo-30668: add missing word in license.rst (pythonGH-13115) Unroll import-team in CODEOWNERS (python#13118) bpo-36594: Fix incorrect use of %p in format strings (pythonGH-12769) bpo-36798: Updating f-string docs for := use case (pythonGH-13107) Update wsgiref.rst (python#10488) Doc/c-api/exceptions.rst: fix grammar (python#12091) bpo-36811: Fix a C compiler warning in _elementtree.c. (pythonGH-13109) Only count number of members once (python#12691) bpo-16024: Doc cleanup regarding path_fd, dir_fd, follow_symlinks (pythonGH-5505) bpo-36791: Safer detection of integer overflow in sum(). (pythonGH-13080) bpo-33530: Implement Happy Eyeballs in asyncio, v2 (pythonGH-7237) ...
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If a user accidentally defined more than one Py_tp_members in the spec, PyType_FromSpec will ignore all but the last use case. However, the number of members count will cause the type to allocate more memory than needed. This leads to weird behavior and crashes.
This is a simple one line solution to make the type initialization safer.
https://bugs.python.org/issue36531