From: Miloslav Semler <majkls@prepere.com>
To: Al Viro <viro@ftp.linux.org.uk>
Cc: Kyle Moffett <mrmacman_g4@mac.com>,
David Newall <david@davidnewall.com>,
Adrian Bunk <bunk@kernel.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
"Serge E. Hallyn" <serge@hallyn.com>,
Bill Davidsen <davidsen@tmr.com>,
Philipp Marek <philipp@marek.priv.at>,
7eggert@gmx.de, bunk@fs.tum.de, linux-kernel@vger.kernel.org
Subject: Re: Chroot bug
Date: Wed, 26 Sep 2007 16:51:12 +0200 [thread overview]
Message-ID: <46FA71E0.8080406@prepere.com> (raw)
In-Reply-To: <20070926134223.GO8181@ftp.linux.org.uk>
Al Viro napsal(a):
> On Wed, Sep 26, 2007 at 03:11:33PM +0200, Miloslav Semler wrote:
>
>>> As for the nested-chroot() bit, the root user inside of a chroot is
>>> always allowed to chroot(). This is necessary for test-suites for
>>> various distro installers, chroot once to enter the installer playpen,
>>> installer chroots again to configure the test-installed-system. Once
>>> you allow a second chroot, you're back at the "can't reliably and
>>> efficiently track directory sub-tree members" problem.
>>>
>>> So if you think it can and should be fixed, then PROVIDE THE CODE.
>>>
>> Miloslav Semler
>>
>
> man openat
>
> This is really pointless, anyway - any code that expects chroot to be
> root-proof is terminally broken.
>
So thanks for information. I did't know anything about *at functions. So
it seems to be more complicated. But maybe it will be good write to
manpage "other systems implement it by other way, so this feature is
unportable".
next prev parent reply other threads:[~2007-09-26 14:51 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <952DN-83o-31@gated-at.bofh.it>
[not found] ` <954cl-29C-3@gated-at.bofh.it>
[not found] ` <95ctn-74b-15@gated-at.bofh.it>
[not found] ` <95cMH-7um-19@gated-at.bofh.it>
[not found] ` <95gdA-4OZ-7@gated-at.bofh.it>
2007-09-20 11:13 ` sys_chroot+sys_fchdir Fix Bodo Eggert
2007-09-20 11:59 ` Philipp Marek
2007-09-20 12:52 ` majkls
2007-09-20 16:06 ` David Newall
2007-09-20 16:17 ` Philipp Marek
2007-09-20 18:02 ` David Newall
2007-09-20 20:53 ` Bill Davidsen
2007-09-21 8:29 ` David Newall
2007-09-24 21:32 ` Serge E. Hallyn
2007-09-24 22:04 ` David Newall
2007-09-24 23:00 ` Serge E. Hallyn
2007-09-25 7:45 ` David Newall
2007-09-25 11:49 ` Serge E. Hallyn
2007-09-25 13:58 ` David Newall
2007-09-25 15:10 ` Chroot bug (was: sys_chroot+sys_fchdir Fix) David Newall
2007-09-25 15:20 ` Jan Engelhardt
2007-09-25 15:39 ` Chroot bug Miloslav Semler
2007-09-25 15:41 ` David Newall
2007-09-25 15:48 ` Jan Engelhardt
2007-09-25 16:19 ` Miloslav Semler
2007-09-25 16:52 ` Jan Engelhardt
2007-09-25 17:00 ` Miloslav Semler
2007-09-25 17:05 ` Jan Engelhardt
2007-09-25 17:09 ` Miloslav Semler
2007-09-25 17:09 ` Al Viro
2007-09-25 17:19 ` Miloslav Semler
2007-09-25 16:53 ` Serge E. Hallyn
2007-09-25 20:51 ` David Newall
2007-09-25 15:30 ` Chroot bug (was: sys_chroot+sys_fchdir Fix) Alan Cox
2007-09-25 15:35 ` Chroot bug David Newall
2007-09-25 15:48 ` Alan Cox
2007-09-25 15:47 ` Jan Engelhardt
2007-09-25 23:50 ` David Newall
2007-09-26 0:18 ` Alan Cox
2007-09-26 10:24 ` David Newall
2007-09-26 10:47 ` Alan Cox
2007-09-26 11:06 ` David Newall
2007-09-26 11:20 ` Alan Cox
[not found] ` <46FA41B4.9040104@prepere.com>
[not found] ` <20070926123522.54ffd56f@the-village.bc.nu>
2007-09-26 11:34 ` Miloslav Semler
2007-09-26 14:09 ` Alan Cox
2007-09-26 13:13 ` Bongani Hlope
2007-09-26 0:55 ` Adrian Bunk
2007-09-26 5:21 ` Kyle Moffett
2007-09-26 5:25 ` Willy Tarreau
2007-09-26 10:27 ` David Newall
2007-09-26 10:45 ` Olivier Galibert
2007-09-26 11:13 ` David Newall
2007-09-26 13:18 ` linux-os (Dick Johnson)
2007-09-26 15:02 ` Olivier Galibert
2007-09-26 12:54 ` Kyle Moffett
2007-09-26 13:11 ` Miloslav Semler
2007-09-26 13:42 ` Al Viro
2007-09-26 14:51 ` Miloslav Semler [this message]
2007-09-26 14:02 ` Kyle Moffett
2007-09-26 15:01 ` Miloslav Semler
2007-09-27 13:49 ` Jiri Kosina
2007-09-25 16:33 ` Arjan van de Ven
2007-09-25 15:32 ` Chroot bug (was: sys_chroot+sys_fchdir Fix) Adrian Bunk
2007-09-25 15:43 ` Chroot bug Miloslav Semler
2007-09-25 16:02 ` Adrian Bunk
2007-09-26 19:23 ` Chroot bug (was: sys_chroot+sys_fchdir Fix) Bodo Eggert
2007-09-24 23:02 ` sys_chroot+sys_fchdir Fix Serge E. Hallyn
[not found] ` <95UE2-1oR-19@gated-at.bofh.it>
[not found] ` <95V72-2ly-17@gated-at.bofh.it>
[not found] ` <97pG8-3B5-47@gated-at.bofh.it>
[not found] ` <97sX2-p1-3@gated-at.bofh.it>
2007-09-26 9:38 ` Nick Craig-Wood
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