GH-88968: Reject socket that is already used as a transport (#98010)

1 files changed, 3 insertions, 0 deletions

diff --git a/Lib/asyncio/selector_events.py b/Lib/asyncio/selector_events.py
index c9bbe2a..d2ee49d 100644
--- a/Lib/asyncio/selector_events.py
+++ b/Lib/asyncio/selector_events.py
@@ -58,6 +58,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
 
     def _make_socket_transport(self, sock, protocol, waiter=None, *,
                                extra=None, server=None):
+        self._ensure_fd_no_transport(sock)
         return _SelectorSocketTransport(self, sock, protocol, waiter,
                                         extra, server)
 
@@ -68,6 +69,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
             ssl_handshake_timeout=constants.SSL_HANDSHAKE_TIMEOUT,
             ssl_shutdown_timeout=constants.SSL_SHUTDOWN_TIMEOUT,
     ):
+        self._ensure_fd_no_transport(rawsock)
         ssl_protocol = sslproto.SSLProtocol(
             self, protocol, sslcontext, waiter,
             server_side, server_hostname,
@@ -80,6 +82,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
 
     def _make_datagram_transport(self, sock, protocol,
                                  address=None, waiter=None, extra=None):
+        self._ensure_fd_no_transport(sock)
         return _SelectorDatagramTransport(self, sock, protocol,
                                           address, waiter, extra)