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[3.15] gh-151763: Fix possible crash on CodeType deallocation (GH-152034) #152069

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Merged
sobolevn merged 1 commit into from
Jun 24, 2026
+14 −7
Merged

[3.15] gh-151763: Fix possible crash on CodeType deallocation (GH-152034) #152069

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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Core_and_Builtins/2026-06-23-23-48-54.gh-issue-151763.Eu8pYQ.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Fixes possible crash on :class:`types.CodeType` deallocation.
20 changes: 13 additions & 7 deletions Objects/codeobject.c
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Original file line number Diff line number Diff line change
Expand Up @@ -743,6 +743,10 @@ _PyCode_New(struct _PyCodeConstructor *con)
return NULL;
}

#ifdef Py_GIL_DISABLED
co->_co_unique_id = _Py_INVALID_UNIQUE_ID;
#endif

if (init_code(co, con) < 0) {
Py_DECREF(co);
return NULL;
Expand Down Expand Up @@ -2449,15 +2453,17 @@ code_dealloc(PyObject *self)
FT_CLEAR_WEAKREFS(self, co->co_weakreflist);
free_monitoring_data(co->_co_monitoring);
#ifdef Py_GIL_DISABLED
// The first element always points to the mutable bytecode at the end of
// the code object, which will be freed when the code object is freed.
for (Py_ssize_t i = 1; i < co->co_tlbc->size; i++) {
char *entry = co->co_tlbc->entries[i];
if (entry != NULL) {
PyMem_Free(entry);
if (co->co_tlbc != NULL) {
// The first element always points to the mutable bytecode at the end of
// the code object, which will be freed when the code object is freed.
for (Py_ssize_t i = 1; i < co->co_tlbc->size; i++) {
char *entry = co->co_tlbc->entries[i];
if (entry != NULL) {
PyMem_Free(entry);
}
}
PyMem_Free(co->co_tlbc);
}
PyMem_Free(co->co_tlbc);
#endif
PyObject_Free(co);
}
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