Preemptively backport the relevant parts of r65420
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 0d2ceb1..6d53a09 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -1329,7 +1329,7 @@
 string_buffer_getbuffer(PyStringObject *self, Py_buffer *view, int flags)
 {
 	return PyBuffer_FillInfo(view, (void *)self->ob_sval, Py_SIZE(self),
-				 0, flags);
+				 1, flags);
 }
 
 static PySequenceMethods string_as_sequence = {