From: Jan Hudec <bulb@ucw.cz>
To: Jamie Lokier <jamie@shareable.org>
Cc: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>,
Eric Van Hensbergen <ericvh@gmail.com>,
linux-fsdevel@vger.kernel.org
Subject: Hiding secrets from root (Was: Re: [RFC][2.6 patch] Allow creation of new namespaces during mount system call)
Date: Thu, 21 Apr 2005 20:52:16 +0200 [thread overview]
Message-ID: <20050421185216.GA23555@vagabond> (raw)
In-Reply-To: <20050421184455.GA7301@mail.shareable.org>
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On Thu, Apr 21, 2005 at 19:44:56 +0100, Jamie Lokier wrote:
> Jan Hudec wrote:
> > By the way, IIRC so far the root can access all kernel memory too via
> > /dev/kmem. So the limiting of root's rights would have to be limited
> > a bit more yet.
>
> On some hardened systems, root is not allowed access to /dev/kmem.
That sure makes sense. Still the secret keys must either never leave
kernel (which would need all the encryption, decryption and checking
code in kernel), or they must be protected in userland too. Which means
the process has to be protected against being ptraced or inspected
through /dev/mem.
-------------------------------------------------------------------------------
Jan 'Bulb' Hudec <bulb@ucw.cz>
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next prev parent reply other threads:[~2005-04-21 18:52 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
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 ` Jan Hudec [this message]
2005-04-21 20:35 ` Hiding secrets from root (Was: Re: [RFC][2.6 patch] Allow creation of new namespaces during mount system call) 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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