From: daw@mozart.cs.berkeley.edu (David Wagner)
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] User chroot
Date: 27 Jun 2001 04:39:38 GMT [thread overview]
Message-ID: <9hbo2a$g77$1@abraham.cs.berkeley.edu> (raw)
In-Reply-To: <E15F3KH-0003fd-00@pmenage-dt.ensim.com> <3B393222.14273547@haque.net>
Mohammad A. Haque wrote:
>Why do this in the kernel when it's available in userspace?
Because the userspace implementations aren't equivalent.
In particular, it is not so easy for them to enforce the following
restriction:
(*) If a non-root user requested the chroot, then setuid/setgid
bits won't have any effect under the new root.
The proposed kernel patch respects (*), but I'm not aware of any
user-level application that ensures (*) is followed.
(Also, there is the small matter that the user-level implementations
are only usable by root, or are setuid root. The latter is only a
minor difference, though, IMHO.)
next prev parent reply other threads:[~2001-06-27 4:42 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0C01A29FBAE24448A792F5C68F5EA47D1205FB@nasdaq.ms.ensim.com>
2001-06-27 0:37 ` [PATCH] User chroot Paul Menage
2001-06-27 0:45 ` H. Peter Anvin
2001-06-27 0:53 ` David Wagner
2001-06-27 0:51 ` David Wagner
2001-06-27 1:08 ` Mohammad A. Haque
2001-06-27 1:24 ` Paul Menage
2001-06-27 1:40 ` Alexander Viro
2001-06-27 2:17 ` Paul Menage
2001-06-27 6:35 ` Kai Henningsen
2001-06-27 7:19 ` Chris Wedgwood
2001-06-27 7:43 ` Alexander Viro
2001-06-27 4:39 ` David Wagner [this message]
2001-06-27 23:11 Andries.Brouwer
-- strict thread matches above, loose matches on Subject: below --
2001-06-27 13:57 Jesse Pollard
2001-06-27 17:42 ` David Wagner
2001-06-26 23:45 Jorgen Cederlof
2001-06-26 23:46 ` H. Peter Anvin
2001-06-27 0:48 ` David Wagner
2001-06-27 12:56 ` Marco Colombo
2001-06-27 13:56 ` Admin Mailing Lists
2001-06-27 3:32 ` Albert D. Cahalan
2001-06-27 4:24 ` H. Peter Anvin
2001-06-27 6:31 ` Kai Henningsen
2001-06-27 20:55 ` Albert D. Cahalan
2001-06-27 21:03 ` H. Peter Anvin
2001-06-27 21:19 ` Albert D. Cahalan
2001-06-28 7:47 ` Sean Hunter
2001-06-28 18:25 ` Albert D. Cahalan
2001-06-27 15:39 ` Marcus Sundberg
2001-06-27 17:55 ` Jorgen Cederlof
2001-06-27 6:37 ` Kai Henningsen
2001-06-27 18:14 ` H. Peter Anvin
2001-06-28 6:54 ` Kai Henningsen
2001-06-29 13:46 ` Jorgen Cederlof
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