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TSAN fixes

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This commit is contained in:
Pablo Galindo Salgado 2025-12-06 19:15:52 +00:00
parent b0adc30759
commit 470b9e4362
3 changed files with 11 additions and 7 deletions
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6
Python/import.c
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@ -5441,7 +5441,10 @@ _imp__set_lazy_attributes_impl(PyObject *module, PyObject *child_module,
PyThreadState *tstate = _PyThreadState_GET();
PyObject *child_dict = NULL;
PyObject *ret = NULL;
PyObject *lazy_modules = tstate->interp->imports.lazy_modules;
// Use atomic load and hold a reference to prevent use-after-free
// if another thread clears lazy_modules during interpreter shutdown.
PyObject *lazy_modules = FT_ATOMIC_LOAD_PTR_RELAXED(tstate->interp->imports.lazy_modules);
Py_XINCREF(lazy_modules);
if (lazy_modules != NULL) {
PyObject *lazy_submodules = PyDict_GetItemWithError(lazy_modules, name);
if (lazy_submodules == NULL) {
@ -5483,6 +5486,7 @@ _imp__set_lazy_attributes_impl(PyObject *module, PyObject *child_module,
ret = Py_NewRef(Py_None);
error:
Py_XDECREF(lazy_modules);
Py_XDECREF(child_dict);
return ret;
}