merge 3.3 (#17968)

diff --cc Modules/posixmodule.c
index 8e84392d5ca85e1a4d6b745304bc0cbc7d427317,a351caeddc7771ddee58689c388a2b8e4b4bbf09..bf571380065e4263c897a176ad29c0ac20002999
--- 1/Modules/posixmodule.c
--- 2/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@@ -10121,9 -10627,10 +10121,10 @@@ posix_listxattr(PyObject *self, PyObjec
          if (length < 0) {
              if (errno == ERANGE) {
                  PyMem_FREE(buffer);
+                 buffer = NULL;
                  continue;
              }
 -            path_error("listxattr", &path);
 +            path_error(&path);
              break;
          }