From owner-cvs-src@FreeBSD.ORG  Thu Mar  1 11:07:19 2007
Return-Path: <owner-cvs-src@FreeBSD.ORG>
X-Original-To: cvs-src@FreeBSD.org
Delivered-To: cvs-src@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 6C0DE16A402;
	Thu,  1 Mar 2007 11:07:19 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from repoman.freebsd.org (repoman.freebsd.org [69.147.83.41])
	by mx1.freebsd.org (Postfix) with ESMTP id 6157913C442;
	Thu,  1 Mar 2007 11:07:19 +0000 (UTC)
	(envelope-from rwatson@FreeBSD.org)
Received: from repoman.freebsd.org (localhost [127.0.0.1])
	by repoman.freebsd.org (8.13.6/8.13.6) with ESMTP id l21B7J4X047598;
	Thu, 1 Mar 2007 11:07:19 GMT
	(envelope-from rwatson@repoman.freebsd.org)
Received: (from rwatson@localhost)
	by repoman.freebsd.org (8.13.6/8.13.4/Submit) id l21B7J6T047597;
	Thu, 1 Mar 2007 11:07:19 GMT (envelope-from rwatson)
Message-Id: <200703011107.l21B7J6T047597@repoman.freebsd.org>
From: Robert Watson <rwatson@FreeBSD.org>
Date: Thu, 1 Mar 2007 11:07:18 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: RELENG_6
Cc: 
Subject: cvs commit: src/sys/kern uipc_usrreq.c
X-BeenThere: cvs-src@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the src tree <cvs-src.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-src>
List-Post: <mailto:cvs-src@freebsd.org>
List-Help: <mailto:cvs-src-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-src>,
	<mailto:cvs-src-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 01 Mar 2007 11:07:19 -0000

rwatson     2007-03-01 11:07:18 UTC

  FreeBSD src repository

  Modified files:        (Branch: RELENG_6)
    sys/kern             uipc_usrreq.c 
  Log:
  Merge uipc_usrreq.c:1.183 from HEAD to RELENG_6:
  
    Close a race that occurs when using sendto() to connect and send on a
    UNIX domain socket at the same time as the remote host is closing the
    new connections as quickly as they open.  Since the connect() and
    send() paths are non-atomic with respect to another, it is possible
    for the second thread's close() call to disconnect the two sockets
    as connect() returns, leading to the consumer (which plans to send())
    with a NULL kernel pointer to its proposed peer.  As a result, after
    acquiring the UNIX domain socket subsystem lock, we need to revalidate
    the connection pointers even though connect() has technically succeed,
    and reurn an error to say that there's no connection on which to
    perform the send.
  
    We might want to rethink the specific errno number, perhaps ECONNRESET
    would be better.
  
    Reported by:    Young Hyun <youngh at caida dot org>
  
  PR:             100940
  
  Revision   Changes    Path
  1.155.2.9  +23 -2     src/sys/kern/uipc_usrreq.c