From owner-freebsd-hackers  Tue Nov 12 23:14:11 2002
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Date: Tue, 12 Nov 2002 23:11:54 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Cameron Grant <gandalf@vilnya.demon.co.uk>
Cc: Matthew Dillon <dillon@apollo.backplane.com>,
	Daniel O'Connor <doconnor@gsoft.com.au>,
	Hans Zaunere <zaunere@yahoo.com>, freebsd-hackers@FreeBSD.ORG
Subject: Re: Shared files within a jail
References: <20021113034726.75787.qmail@web12801.mail.yahoo.com> <1037159767.66058.34.camel@chowder.localdomain> <200211130530.gAD5UxNt067928@apollo.backplane.com> <011e01c28ade$95d1c280$4004020a@haveblue>
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Cameron Grant wrote:
> null mounts, in -stable at least, are broken for this purpose.  on
> connection, sshd revoke()s some device- its pty, i assume, and when this
> hits the nullfs layer a null pointer is dereferenced.  if i had vfs-clue i'd
> have fixed it when i found the panic about two weeks ago.  when i overcame
> this by putting the jails /dev on an nfs loopback, i managed to produce two
> more different panics.

1)	Use devfs instead.

2)	Mount a devfs instance in each jail.  Problem solved.

-- Terry

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