Close #13022: _multiprocessing.recvfd() doesn't check that file descriptor was actually received
diff --git a/Lib/test/test_multiprocessing.py b/Lib/test/test_multiprocessing.py
index c2a2f19..0e480a9 100644
--- a/Lib/test/test_multiprocessing.py
+++ b/Lib/test/test_multiprocessing.py
@@ -1574,6 +1574,23 @@
with open(test_support.TESTFN, "rb") as f:
self.assertEqual(f.read(), b"bar")
+ @classmethod
+ def _send_data_without_fd(self, conn):
+ os.write(conn.fileno(), b"\0")
+
+ @unittest.skipIf(sys.platform == "win32", "doesn't make sense on Windows")
+ def test_missing_fd_transfer(self):
+ # Check that exception is raised when received data is not
+ # accompanied by a file descriptor in ancillary data.
+ if self.TYPE != 'processes':
+ self.skipTest("only makes sense with processes")
+ conn, child_conn = self.Pipe(duplex=True)
+
+ p = self.Process(target=self._send_data_without_fd, args=(child_conn,))
+ p.daemon = True
+ p.start()
+ self.assertRaises(RuntimeError, reduction.recv_handle, conn)
+ p.join()
class _TestListenerClient(BaseTestCase):