Date: Thu, 16 Feb 2006 11:12:59 GMT From: Andrew Hacking <ahacking@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/93423: Applying devfs rulset fails Message-ID: <200602161112.k1GBCxXh040804@www.freebsd.org> Resent-Message-ID: <200602161120.k1GBKArT027964@freefall.freebsd.org>
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>Number: 93423 >Category: kern >Synopsis: Applying devfs rulset fails >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Feb 16 11:20:09 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Andrew Hacking >Release: 6.0-RELEASE-p4 >Organization: >Environment: FreeBSD home.inet 6.0-RELEASE-p4 FreeBSD 6.0-RELEASE-p4 #1: Wed Feb 15 10:50:20 EST 2006 root@home.inet:/usr/obj/usr/src/sys/DELL4100 i386 >Description: It is currently not possible (for me at least) to setup a secure jail by adding devfs rules. Also devfs commands can leave the system in a state where it is not possible to shutdown cleanly. On attempting to setup devfs for a jail, the following devfs command fails: # mount_devfs devfs /jail/foo/dev # devfs -m /jail/foo/dev rule -s 4 applyset devfs rule: ioctl DEVFSIO_SAPPLY: No such process [Note: rule-set doesn't get applied] Also, trying to apply rules manually hangs and never returns, leaving the process blocked in disk (D) wait state. Shutting down the system also never completes and requires a power cycle and (at least for me) required manual fsck of most file-systems on reboot. This could potentially be related to the problem described in: http://lists.freebsd.org/pipermail/freebsd-hackers/2006-January/015009.html My revision of /usr/src/sys/fs/devfs_rule.c is: $FreeBSD: src/sys/fs/devfs/devfs_rule.c,v 1.14.2.2 2005/09/26 14:36:52 phk Exp $ I will try revision listed in above email and report back.... >How-To-Repeat: # mkdir /tmp/foodev # mount_devfs devfs /tmp/foodev # devfs -m /tmp/foodev rule -s4 applyset devfs rule: ioctl DEVFSIO_SAPPLY: No such process [Note: rule-set doesn't get applied] Now try adding rules manually to trigger process hang: # devfs -m /tmp/foodev rule add hide # devfs -m /tmp/foodev rule add path null unhide .. etc ... >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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