bpo-34139: Remove unix datagram socket from FS before binding (GH-8323)

https://bugs.python.org/issue34139

1 files changed, 14 insertions, 0 deletions

diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py
index 36fe7e0..9b4b846 100644
--- a/Lib/asyncio/base_events.py
+++ b/Lib/asyncio/base_events.py
@@ -20,6 +20,7 @@ import heapq
 import itertools
 import os
 import socket
+import stat
 import subprocess
 import threading
 import time
@@ -1183,6 +1184,19 @@ class BaseEventLoop(events.AbstractEventLoop):
                 for addr in (local_addr, remote_addr):
                     if addr is not None and not isinstance(addr, str):
                         raise TypeError('string is expected')
+
+                if local_addr and local_addr[0] not in (0, '\x00'):
+                    try:
+                        if stat.S_ISSOCK(os.stat(local_addr).st_mode):
+                            os.remove(local_addr)
+                    except FileNotFoundError:
+                        pass
+                    except OSError as err:
+                        # Directory may have permissions only to create socket.
+                        logger.error('Unable to check or remove stale UNIX '
+                                     'socket %r: %r',
+                                     local_addr, err)
+
                 addr_pairs_info = (((family, proto),
                                     (local_addr, remote_addr)), )
             else: