From: Christoph Hellwig <hch@infradead.org>
To: Jan Hudec <bulb@ucw.cz>
Cc: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>,
Ram <linuxram@us.ibm.com>, Jamie Lokier <jamie@shareable.org>,
Eric Van Hensbergen <ericvh@gmail.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: Mount bind filehandle (Was: Re: [RFC][2.6 patch] Allow creation of new namespaces during mount system call)
Date: Thu, 21 Apr 2005 09:09:01 +0100 [thread overview]
Message-ID: <20050421080901.GA17629@infradead.org> (raw)
In-Reply-To: <20050421073320.GA335@vagabond>
On Thu, Apr 21, 2005 at 09:33:20AM +0200, Jan Hudec wrote:
> I think I can. And I think I can modify the proposal to something a bit
> more sane.
>
> The problem is: The mount should be accessible only by processes started
> by the authorized user, but not by other user, including root, who is
> capable of changing their uid to the authorized user's id.
>
> The solution can be: The mount is only accessible to the process group
> of that user's session. That's easy -- the login process is created
> with new namespace.
That doesn't make sense. A process with sufficient capabilities (aka root)
can do things including reading or modifying kernel memory and can
access your namespace always, no matter how difficult you're trying to make
it.
next prev parent reply other threads:[~2005-04-21 8:09 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-04-19 22:13 [RFC][2.6 patch] Allow creation of new namespaces during mount system call Eric Van Hensbergen
2005-04-19 22:23 ` Al Viro
2005-04-19 23:53 ` Eric Van Hensbergen
2005-04-20 3:33 ` Al Viro
2005-04-20 9:45 ` Jamie Lokier
2005-04-20 10:27 ` Al Viro
2005-04-20 12:03 ` Jamie Lokier
2005-04-20 12:39 ` Al Viro
2005-04-20 16:51 ` Ram
2005-04-20 17:09 ` Al Viro
2005-04-20 17:53 ` Miklos Szeredi
[not found] ` <a4e6962a0504201107518416e9@mail.gmail.com>
2005-04-20 18:18 ` Eric Van Hensbergen
2005-04-20 18:34 ` Miklos Szeredi
2005-04-20 20:43 ` Jamie Lokier
2005-04-20 20:54 ` Al Viro
2005-04-20 22:16 ` Jamie Lokier
2005-04-20 21:08 ` Al Viro
2005-04-20 22:19 ` Jamie Lokier
2005-04-20 18:00 ` Eric Van Hensbergen
2005-04-20 18:33 ` Ram
2005-04-20 22:04 ` Jamie Lokier
2005-04-30 8:56 ` Christoph Hellwig
2005-04-30 15:01 ` Jamie Lokier
2005-05-11 9:05 ` Christoph Hellwig
2005-04-21 7:33 ` Mount bind filehandle (Was: Re: [RFC][2.6 patch] Allow creation of new namespaces during mount system call) Jan Hudec
2005-04-21 8:09 ` Christoph Hellwig [this message]
2005-04-21 9:32 ` Jan Hudec
2005-04-20 18:57 ` [RFC][2.6 patch] Allow creation of new namespaces during mount system call Bryan Henderson
2005-04-20 19:37 ` Miklos Szeredi
2005-04-21 0:08 ` Bryan Henderson
2005-04-21 8:06 ` Miklos Szeredi
2005-04-21 13:33 ` [RFC][patch] mount permissions (was: [RFC][2.6 patch] Allow ...) Miklos Szeredi
2005-04-21 16:57 ` [RFC][2.6 patch] Allow creation of new namespaces during mount system call Bryan Henderson
2005-04-20 20:51 ` Al Viro
2005-04-21 0:23 ` Bryan Henderson
2005-04-21 0:32 ` Al Viro
2005-04-21 8:10 ` Christoph Hellwig
2005-04-20 21:09 ` Ram
2005-04-21 0:42 ` Bryan Henderson
2005-04-21 19:10 ` Ram
2005-04-20 18:25 ` Bryan Henderson
2005-04-20 12:48 ` Jan Hudec
2005-04-20 22:13 ` Jamie Lokier
2005-04-21 10:09 ` Jan Hudec
2005-04-21 18:44 ` Jamie Lokier
2005-04-21 18:52 ` Hiding secrets from root (Was: Re: [RFC][2.6 patch] Allow creation of new namespaces during mount system call) Jan Hudec
2005-04-21 20:35 ` Jamie Lokier
2005-04-20 13:14 ` [RFC][2.6 patch] Allow creation of new namespaces during mount system call Eric Van Hensbergen
2005-04-20 13:55 ` Eric Van Hensbergen
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