bpo-46417: Fix race condition on setting type __bases__ #30788
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Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses.
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Thanks @vstinner for the PR 🌮🎉.. I'm working now to backport this PR to: 3.9, 3.10. |
miss-islington
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Jan 22, 2022
Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses. (cherry picked from commit f1c6ae3) Co-authored-by: Victor Stinner <[email protected]>
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GH-30789 is a backport of this pull request to the 3.10 branch. |
miss-islington
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Jan 22, 2022
Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses. (cherry picked from commit f1c6ae3) Co-authored-by: Victor Stinner <[email protected]>
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GH-30790 is a backport of this pull request to the 3.9 branch. |
vstinner
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Jan 22, 2022
…H-30789) Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses. (cherry picked from commit f1c6ae3) Co-authored-by: Victor Stinner <[email protected]> Co-authored-by: Victor Stinner <[email protected]>
vstinner
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Jan 22, 2022
…H-30790) Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses. (cherry picked from commit f1c6ae3) Co-authored-by: Victor Stinner <[email protected]> Co-authored-by: Victor Stinner <[email protected]>
hello-adam
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Jun 2, 2022
…) (pythonGH-30790) Fix a race condition on setting a type __bases__ attribute: the internal function add_subclass() now gets the PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef() which can trigger a garbage collection which can indirectly modify PyTypeObject.tp_subclasses. (cherry picked from commit f1c6ae3) Co-authored-by: Victor Stinner <[email protected]> Co-authored-by: Victor Stinner <[email protected]>
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Fix a race condition on setting a type bases attribute: the
internal function add_subclass() now gets the
PyTypeObject.tp_subclasses member after calling PyWeakref_NewRef()
which can trigger a garbage collection which can indirectly modify
PyTypeObject.tp_subclasses.
https://bugs.python.org/issue46417