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| author | Serhiy Storchaka <storchaka@gmail.com> | 2020-10-04 21:55:57 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-10-04 21:55:57 (GMT) |
| commit | 9ece9cd65cdeb0a1f6e60475bbd0219161c348ac (patch) | |
| tree | 0ed869df28102785bfbb38ae7178aac48c1672bb /Misc/NEWS.d | |
| parent | 619f98045d73859688e5cfdb946d183e6d493a64 (diff) | |
| download | cpython-9ece9cd65cdeb0a1f6e60475bbd0219161c348ac.zip cpython-9ece9cd65cdeb0a1f6e60475bbd0219161c348ac.tar.gz cpython-9ece9cd65cdeb0a1f6e60475bbd0219161c348ac.tar.bz2 | |
bpo-41909: Enable previously disabled recursion checks. (GH-22536)
Enable recursion checks which were disabled when get __bases__ of
non-type objects in issubclass() and isinstance() and when intern
strings. It fixes a stack overflow when getting __bases__ leads
to infinite recursion.
Originally recursion checks was disabled for PyDict_GetItem() which
silences all errors including the one raised in case of detected
recursion and can return incorrect result. But now the code uses
PyDict_GetItemWithError() and PyDict_SetDefault() instead.
Diffstat (limited to 'Misc/NEWS.d')
| -rw-r--r-- | Misc/NEWS.d/next/Core and Builtins/2020-10-04-10-55-12.bpo-41909.BqHPcm.rst | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Misc/NEWS.d/next/Core and Builtins/2020-10-04-10-55-12.bpo-41909.BqHPcm.rst b/Misc/NEWS.d/next/Core and Builtins/2020-10-04-10-55-12.bpo-41909.BqHPcm.rst new file mode 100644 index 0000000..388cfea --- /dev/null +++ b/Misc/NEWS.d/next/Core and Builtins/2020-10-04-10-55-12.bpo-41909.BqHPcm.rst @@ -0,0 +1,2 @@ +Fixed stack overflow in :func:`issubclass` and :func:`isinstance` when +getting the ``__bases__`` attribute leads to infinite recursion. |