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Date:      Sun, 7 Sep 1997 21:54:34 -0400 (EDT)
From:      Mikhail Teterin <mi@xxx.video-collage.com>
To:        FreeBSD-gnats-submit@FreeBSD.ORG
Subject:   bin/4491: combination of null-FS , NFS and chroot crash the system
Message-ID:  <199709080154.VAA12009@xxx.video-collage.com>
Resent-Message-ID: <199709080200.TAA26167@hub.freebsd.org>

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>Number:         4491
>Category:       bin
>Synopsis:       combination of null-FS , NFS and chroot crash the system
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep  7 19:00:01 PDT 1997
>Last-Modified:
>Originator:     Mikhail Teterin
>Organization:
Virtual Estates, Inc.
>Release:        FreeBSD 2.2.1-RELEASE i386
>Environment:

	BigMachine is a 2.2.1-RELEASE. SmallMachine is 2.2.2-RELEASE

>Description:

	null-FS is mounted over the subdirectory of NFS mount point

>How-To-Repeat:

On BigMachine as root:
	mkdir /SmallMachine
	mount -t nfs SmallMachine:/ /SmallMachine
	mount -t nfs SmallMachine:/usr /SmallMachine/usr
	# SmallMachine does not have anything in it's /usr/local
	mount -t null /usr/local /SmallMachine/usr/local
	chroot /SmallMachine tcsh
		!!! BigMachine reboots !!!


>Fix:
	
	I wish I knew
>Audit-Trail:
>Unformatted:



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