GeezerVison is showing github.com — [3.12] gh-109496: Detect Py_DECREF() after dealloc in debug mode (GH-109539) by miss-islington · Pull Request #109545 · python/cpython
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Sep 18, 2023
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On a Python built in debug mode, Py_DECREF() now calls
_Py_NegativeRefcount() if the object is a dangling pointer to
deallocated memory: memory filled with 0xDD "dead byte" by the debug
hook on memory allocators. The fix is to check the reference count
before checking for _Py_IsImmortal().
Add test_decref_freed_object() to test_capi.test_misc.
(cherry picked from commit 0bb0d88)
Co-authored-by: Victor Stinner [email protected]
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…onGH-109539)
On a Python built in debug mode, Py_DECREF() now calls
_Py_NegativeRefcount() if the object is a dangling pointer to
deallocated memory: memory filled with 0xDD "dead byte" by the debug
hook on memory allocators. The fix is to check the reference count
*before* checking for _Py_IsImmortal().
Add test_decref_freed_object() to test_capi.test_misc.
(cherry picked from commit 0bb0d88)
Co-authored-by: Victor Stinner <[email protected]>
This was referenced Sep 18, 2023
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