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Memory leak when reading co_code attribute of deepfrozen code objects #93728

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kumaraditya303
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3.12only security fixes
@kumaraditya303

Description

@kumaraditya303

Reproducer:

importosos.path.join.__code__.co_code

Relevant Valgrind Report:

==21416== HEAP SUMMARY:==21416==     in use at exit: 397 bytes in 1 blocks==21416==   total heap usage: 19,728 allocs, 19,727 frees, 2,629,532 bytes allocated==21416====21416== 397 bytes in 1 blocks are still reachable in loss record 1 of 1==21416==    at 0x483B7F3: malloc (in /usr/lib/x86_64-linux-gnu/valgrind/vgpreload_memcheck-amd64-linux.so)==21416==    by 0x2FA6DD: _PyMem_RawMalloc (obmalloc.c:101)==21416==    by 0x2FC5CD: PyObject_Malloc (obmalloc.c:713)==21416==    by 0x287BDC: _PyBytes_FromSize (bytesobject.c:103)==21416==    by 0x2881A6: PyBytes_FromStringAndSize (bytesobject.c:136)==21416==    by 0x29F609: _PyCode_GetCode (codeobject.c:1374)==21416==    by 0x29F69B: code_getcode (codeobject.c:1728)==21416==    by 0x2A31B2: getset_get (descrobject.c:202)==21416==    by 0x2F86E6: _PyObject_GenericGetAttrWithDict (object.c:1269)==21416==    by 0x2F8F14: PyObject_GenericGetAttr (object.c:1357)==21416==    by 0x2F9864: PyObject_GetAttr (object.c:912)==21416==    by 0x3B5B16: _PyEval_EvalFrameDefault (ceval.c:3472)==21416====21416== LEAK SUMMARY:==21416==    definitely lost: 0 bytes in 0 blocks==21416==    indirectly lost: 0 bytes in 0 blocks==21416==      possibly lost: 0 bytes in 0 blocks==21416==    still reachable: 397 bytes in 1 blocks==21416==         suppressed: 0 bytes in 0 blocks==21416==

This is a 3.12 only regression caused by#93382.

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