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

1 files changed, 7 insertions, 4 deletions

diff --git a/Include/descrobject.h b/Include/descrobject.h
index 8f3e84c365..cb43174838 100644
--- a/Include/descrobject.h
+++ b/Include/descrobject.h
@@ -9,10 +9,10 @@ typedef PyObject *(*getter)(PyObject *, void *);
 typedef int (*setter)(PyObject *, PyObject *, void *);
 
 typedef struct PyGetSetDef {
-    char *name;
+    const char *name;
     getter get;
     setter set;
-    char *doc;
+    const char *doc;
     void *closure;
 } PyGetSetDef;
 
@@ -24,11 +24,11 @@ typedef PyObject *(*wrapperfunc_kwds)(PyObject *self, PyObject *args,
                                       void *wrapped, PyObject *kwds);
 
 struct wrapperbase {
-    char *name;
+    const char *name;
     int offset;
     void *function;
     wrapperfunc wrapper;
-    char *doc;
+    const char *doc;
     int flags;
     PyObject *name_strobj;
 };
@@ -90,6 +90,9 @@ PyAPI_FUNC(PyObject *) PyDescr_NewMember(PyTypeObject *,
 PyAPI_FUNC(PyObject *) PyDescr_NewGetSet(PyTypeObject *,
                                                struct PyGetSetDef *);
 #ifndef Py_LIMITED_API
+
+PyAPI_FUNC(PyObject *) _PyMethodDescr_FastCallKeywords(
+        PyObject *descrobj, PyObject **stack, Py_ssize_t nargs, PyObject *kwnames);
 PyAPI_FUNC(PyObject *) PyDescr_NewWrapper(PyTypeObject *,
                                                 struct wrapperbase *, void *);
 #define PyDescr_IsData(d) (Py_TYPE(d)->tp_descr_set != NULL)