From owner-freebsd-current@FreeBSD.ORG  Wed Oct 19 22:18:05 2005
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: current@FreeBSD.org
Delivered-To: freebsd-current@FreeBSD.ORG
Received: from green.homeunix.org (freefall.freebsd.org [216.136.204.21])
	by hub.freebsd.org (Postfix) with ESMTP id 9FAE016A41F;
	Wed, 19 Oct 2005 22:18:05 +0000 (GMT)
	(envelope-from green@green.homeunix.org)
Received: from green.homeunix.org (green@localhost [127.0.0.1])
	by green.homeunix.org (8.13.4/8.13.1) with ESMTP id j9JMI5kF056228;
	Wed, 19 Oct 2005 18:18:05 -0400 (EDT)
	(envelope-from green@green.homeunix.org)
Received: (from green@localhost)
	by green.homeunix.org (8.13.4/8.13.1/Submit) id j9JMI4H7056227;
	Wed, 19 Oct 2005 18:18:04 -0400 (EDT) (envelope-from green)
Date: Wed, 19 Oct 2005 18:18:04 -0400
From: Brian Fundakowski Feldman <green@FreeBSD.org>
To: Pawel Jakub Dawidek <pjd@FreeBSD.org>
Message-ID: <20051019221804.GA43031@green.homeunix.org>
References: <Pine.BSF.4.53.0510151551460.28204@e0-0.zab2.int.zabbadoz.net>
	<20051016194819.GB3017@garage.freebsd.pl>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20051016194819.GB3017@garage.freebsd.pl>
User-Agent: Mutt/1.5.11
Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>,
	FreeBSD current mailing list <current@FreeBSD.org>
Subject: Re: mount memory modified after free
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 19 Oct 2005 22:18:05 -0000

On Sun, Oct 16, 2005 at 09:48:19PM +0200, Pawel Jakub Dawidek wrote:
> On Sat, Oct 15, 2005 at 04:00:08PM +0000, Bjoern A. Zeeb wrote:
> +> Hi,
> +> 
> +> I had /dev/ad8s4d mounted read only to /shared and
> +> /local/building/ports/shared, then unounted /shared and did a
> +> mount -u -o rw /local/building/ports/shared *kaboom*
> 
> This is known problem. Multiple read-only mounts aren't safe.

Do you mean that multiply-mounting both read-write and read-only isn't
safe?  I don't think multiple read-only mounts are unsafe.

-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green@FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\