From: Jamie Lokier <jamie@shareable.org>
To: Jan Hudec <bulb@ucw.cz>
Cc: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>,
Eric Van Hensbergen <ericvh@gmail.com>,
linux-fsdevel@vger.kernel.org
Subject: Re: Hiding secrets from root (Was: Re: [RFC][2.6 patch] Allow creation of new namespaces during mount system call)
Date: Thu, 21 Apr 2005 21:35:34 +0100 [thread overview]
Message-ID: <20050421203534.GA8793@mail.shareable.org> (raw)
In-Reply-To: <20050421185216.GA23555@vagabond>
Jan Hudec wrote:
> 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.
That's right. Protecting users' private data from access by the
administrators on a multi-user system is, not surprisingly, hard....
-- Jamie
next prev parent reply other threads:[~2005-04-21 20:35 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 ` 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 [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20050421203534.GA8793@mail.shareable.org \
--to=jamie@shareable.org \
--cc=bulb@ucw.cz \
--cc=ericvh@gmail.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=viro@parcelfarce.linux.theplanet.co.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).