[Python-checkins] cpython (3.4): Issue #22435: Fix a file descriptor leak when SocketServer bind fails.

[charles-francois.natali]

https://hg.python.org/cpython/rev/9c8016af2ed8
changeset:   93028:9c8016af2ed8
branch:      3.4
parent:      93019:d686de84dc10
user:        Charles-François Natali <cf.natali at gmail.com>
date:        Mon Oct 13 19:19:26 2014 +0100
summary:
  Issue #22435: Fix a file descriptor leak when SocketServer bind fails.

files:
  Lib/socketserver.py           |   8 ++++++--
  Lib/test/test_socketserver.py |  10 ++++++++++
  Misc/NEWS                     |   2 ++
  3 files changed, 18 insertions(+), 2 deletions(-)


diff --git a/Lib/socketserver.py b/Lib/socketserver.py
--- a/Lib/socketserver.py
+++ b/Lib/socketserver.py
@@ -426,8 +426,12 @@
         self.socket = socket.socket(self.address_family,
                                     self.socket_type)
         if bind_and_activate:
-            self.server_bind()
-            self.server_activate()
+            try:
+                self.server_bind()
+                self.server_activate()
+            except:
+                self.server_close()
+                raise
 
     def server_bind(self):
         """Called by constructor to bind the socket.
diff --git a/Lib/test/test_socketserver.py b/Lib/test/test_socketserver.py
--- a/Lib/test/test_socketserver.py
+++ b/Lib/test/test_socketserver.py
@@ -302,6 +302,16 @@
             t.join()
             s.server_close()
 
+    def test_tcpserver_bind_leak(self):
+        # Issue #22435: the server socket wouldn't be closed if bind()/listen()
+        # failed.
+        # Create many servers for which bind() will fail, to see if this result
+        # in FD exhaustion.
+        for i in range(1024):
+            with self.assertRaises(OverflowError):
+                socketserver.TCPServer((HOST, -1),
+                                       socketserver.StreamRequestHandler)
+
 
 def test_main():
     if imp.lock_held():
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -27,6 +27,8 @@
 Library
 -------
 
+- Issue #22435: Fix a file descriptor leak when SocketServer bind fails.
+
 - Issue #13096: Fixed segfault in CTypes POINTER handling of large
   values.
 

-- 
Repository URL: https://hg.python.org/cpython