From owner-freebsd-bugs@FreeBSD.ORG Thu Nov 2 01:21:48 2006 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id B65C516A412 for ; Thu, 2 Nov 2006 01:21:48 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id CB4F443D90 for ; Thu, 2 Nov 2006 01:20:27 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.4/8.13.4) with ESMTP id kA21KOlm071592 for ; Thu, 2 Nov 2006 01:20:24 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.4/8.13.4/Submit) id kA21KOx2071591; Thu, 2 Nov 2006 01:20:24 GMT (envelope-from gnats) Resent-Date: Thu, 2 Nov 2006 01:20:24 GMT Resent-Message-Id: <200611020120.kA21KOx2071591@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, "Mikhail T." Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1E28516A40F for ; Thu, 2 Nov 2006 01:14:11 +0000 (UTC) (envelope-from mi@aldan.algebra.com) Received: from aldan.algebra.com (aldan.algebra.com [216.254.65.224]) by mx1.FreeBSD.org (Postfix) with ESMTP id A640243D5E for ; Thu, 2 Nov 2006 01:14:10 +0000 (GMT) (envelope-from mi@aldan.algebra.com) Received: from aldan.algebra.com (aldan [127.0.0.1]) by aldan.algebra.com (8.13.8/8.13.7) with ESMTP id kA21E9Ix011767 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 1 Nov 2006 20:14:09 -0500 (EST) (envelope-from mi@aldan.algebra.com) Received: (from mi@localhost) by aldan.algebra.com (8.13.8/8.13.7/Submit) id kA21E9Rp011766; Wed, 1 Nov 2006 20:14:09 -0500 (EST) (envelope-from mi) Message-Id: <200611020114.kA21E9Rp011766@aldan.algebra.com> Date: Wed, 1 Nov 2006 20:14:09 -0500 (EST) From: "Mikhail T." To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/105056: FS can not be remounted read-only, if a running process' executable was modified X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 02 Nov 2006 01:21:48 -0000 >Number: 105056 >Category: kern >Synopsis: FS can not be remounted read-only, if a running process' executable was modified >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Nov 02 01:20:23 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Mikhail T. >Release: FreeBSD 6.2-PRERELEASE amd64 >Organization: Virtual Estates, Inc. >Environment: System: FreeBSD aldan.algebra.com 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #1: Sat Sep 30 16:33:20 EDT 2006 root@aldan.algebra.com:/meow/obj/var/src/sys/SILVER amd64 >Description: If a running process' image is overwritten (such by install-ing a new version), the hosting file-system can not be remounted read-only until the process exits. >How-To-Repeat: Here is an example. My / is routinely mounted read-only: % mount -orw -u / % cp -p /bin/sleep /tmp/ % sleep 3600 & % install -m 755 -o root -g bin /tmp/sleep /bin/sleep % mount -oro -u / mount: /dev/ad4s1a: Device busy Ending the running process, allows the read-only remount: % kill % % mount -oro -u / % >Fix: >Release-Note: >Audit-Trail: >Unformatted: