From owner-cvs-all@FreeBSD.ORG  Wed Feb 14 12:22:11 2007
Return-Path: <owner-cvs-all@FreeBSD.ORG>
X-Original-To: cvs-all@FreeBSD.org
Delivered-To: cvs-all@FreeBSD.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id B548B16A402;
	Wed, 14 Feb 2007 12:22:11 +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 A675D13C46B;
	Wed, 14 Feb 2007 12:22:11 +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 l1ECMB7C027073;
	Wed, 14 Feb 2007 12:22:11 GMT
	(envelope-from rwatson@repoman.freebsd.org)
Received: (from rwatson@localhost)
	by repoman.freebsd.org (8.13.6/8.13.4/Submit) id l1ECMBXF027072;
	Wed, 14 Feb 2007 12:22:11 GMT (envelope-from rwatson)
Message-Id: <200702141222.l1ECMBXF027072@repoman.freebsd.org>
From: Robert Watson <rwatson@FreeBSD.org>
Date: Wed, 14 Feb 2007 12:22:11 +0000 (UTC)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org
X-FreeBSD-CVS-Branch: HEAD
Cc: 
Subject: cvs commit: src/sys/kern uipc_usrreq.c
X-BeenThere: cvs-all@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: CVS commit messages for the entire tree <cvs-all.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/cvs-all>
List-Post: <mailto:cvs-all@freebsd.org>
List-Help: <mailto:cvs-all-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/cvs-all>,
	<mailto:cvs-all-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 14 Feb 2007 12:22:11 -0000

rwatson     2007-02-14 12:22:11 UTC

  FreeBSD src repository

  Modified files:
    sys/kern             uipc_usrreq.c 
  Log:
  Change unp_mtx to supporting recursion, and do not drop the unp_mtx over
  sonewconn() in unp_connect().  This avoids a race that occurs due to
  v_socket being an uncounted reference, as the lock was being released in
  order to call sonewconn(), which otherwise recurses into the UNIX domain
  socket code via pru_attach, as well as holding the lock over a sleeping
  memory allocation in uipc_attach().  Switch to a non-sleeping memory
  allocation during UNIX domain socket attach.
  
  This fix non-ideal in that it requires enabling recursion, but is a much
  smaller change than moving to using true references for v_socket.  The
  reported panic occurs in unp_connect() following the return of
  sonewconn().
  
  Update copyright year.
  
  Panic reported by:      jhb
  
  Revision  Changes    Path
  1.193     +5 -13     src/sys/kern/uipc_usrreq.c