Issue #29392: Prevent crash when passing invalid arguments into msvcrt module.

1 files changed, 8 insertions, 4 deletions

diff --git a/Modules/clinic/_weakref.c.h b/Modules/clinic/_weakref.c.h
index ab84c304d9..d847867c4c 100644
--- a/Modules/clinic/_weakref.c.h
+++ b/Modules/clinic/_weakref.c.h
@@ -37,26 +37,30 @@ PyDoc_STRVAR(_weakref__remove_dead_weakref__doc__,
 "Atomically remove key from dict if it points to a dead weakref.");
 
 #define _WEAKREF__REMOVE_DEAD_WEAKREF_METHODDEF    \
-    {"_remove_dead_weakref", (PyCFunction)_weakref__remove_dead_weakref, METH_VARARGS, _weakref__remove_dead_weakref__doc__},
+    {"_remove_dead_weakref", (PyCFunction)_weakref__remove_dead_weakref, METH_FASTCALL, _weakref__remove_dead_weakref__doc__},
 
 static PyObject *
 _weakref__remove_dead_weakref_impl(PyObject *module, PyObject *dct,
                                    PyObject *key);
 
 static PyObject *
-_weakref__remove_dead_weakref(PyObject *module, PyObject *args)
+_weakref__remove_dead_weakref(PyObject *module, PyObject **args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
     PyObject *dct;
     PyObject *key;
 
-    if (!PyArg_ParseTuple(args, "O!O:_remove_dead_weakref",
+    if (!_PyArg_ParseStack(args, nargs, "O!O:_remove_dead_weakref",
         &PyDict_Type, &dct, &key)) {
         goto exit;
     }
+
+    if (!_PyArg_NoStackKeywords("_remove_dead_weakref", kwnames)) {
+        goto exit;
+    }
     return_value = _weakref__remove_dead_weakref_impl(module, dct, key);
 
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=e860dd818a44bc9b input=a9049054013a1b77]*/
+/*[clinic end generated code: output=b686303486bdfefd input=a9049054013a1b77]*/