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From: Christoph Lameter <cl@linux.com>
To: Serge Hallyn <serge.hallyn@ubuntu.com>
Cc: Serge Hallyn <serge.hallyn@canonical.com>,
	Andy Lutomirski <luto@amacapital.net>,
	Jonathan Corbet <corbet@lwn.net>,
	Aaron Jones <aaronmdjones@gmail.com>, "Ted Ts'o" <tytso@mit.edu>,
	linux-security-module@vger.kernel.org,
	linux-kernel@vger.kernel.org, akpm@linuxfoundation.org,
	morgan@kernel.org
Subject: Re: [capabilities] Allow normal inheritance for a configurable set of capabilities
Date: Tue, 3 Feb 2015 09:23:12 -0600 (CST)	[thread overview]
Message-ID: <alpine.DEB.2.11.1502030920050.6059@gentwo.org> (raw)
In-Reply-To: <20150202171257.GD24351@ubuntumail>

On Mon, 2 Feb 2015, Serge Hallyn wrote:

> A key concept behind posix capabilities is that the privilege comes from
> both the person and the file being executed.  As you say below basically
> anything can be executed by the program so that is completely violated.

Well this patch does not change that. Its just that the file being
executed can inherit the parent caps without having to set caps in the new
executable.

> Still, it's not that different from mmapping some arbitrary code and
> jumping into it whlie retaining caps.

Owww. Thats a pretty far jump from what this patch does.

> Not saying this is a good idea necessarily, but worth thinking about.

Well we keep on having actual problems with caps for long years now. We
need a solution. This means a patch that solves the issue.

  parent reply	other threads:[~2015-02-03 15:23 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-02-02 16:21 [capabilities] Allow normal inheritance for a configurable set of capabilities Christoph Lameter
2015-02-02 17:12 ` Serge Hallyn
2015-02-02 17:18   ` Andy Lutomirski
2015-02-02 18:09     ` Serge Hallyn
2015-02-03 15:16     ` Christoph Lameter
2015-02-03 15:23   ` Christoph Lameter [this message]
2015-02-03 15:55     ` Serge E. Hallyn
2015-02-03 17:18       ` Christoph Lameter
2015-02-03 17:26         ` Serge E. Hallyn
2015-02-04 15:15           ` Andrew G. Morgan
2015-02-04 15:50             ` Christoph Lameter
2015-02-04 15:56               ` Serge E. Hallyn
2015-02-04 16:12                 ` Andrew G. Morgan
2015-02-04 16:34                   ` Andy Lutomirski
2015-02-04 16:54                     ` Andrew G. Morgan
2015-02-04 17:34                       ` Serge E. Hallyn
2015-02-04 18:12                         ` Christoph Lameter
2015-02-04 16:43                   ` Christoph Lameter
2015-02-04 16:27                 ` Andy Lutomirski
2015-02-05  0:34             ` Serge E. Hallyn
2015-02-05 15:23               ` Serge E. Hallyn
2015-02-25 21:50     ` Pavel Machek
2015-02-25 23:59       ` Christoph Lameter
2015-02-26 12:27         ` Pavel Machek
2015-02-27 20:15           ` Andy Lutomirski
2015-02-27 20:48             ` Pavel Machek
2015-02-27 20:56               ` Andy Lutomirski
2015-02-27 22:47                 ` Pavel Machek
2015-02-02 17:54 ` Casey Schaufler
2015-02-02 18:08   ` Serge Hallyn
2015-02-02 18:47     ` Mimi Zohar
2015-02-02 19:05       ` Austin S Hemmelgarn
2015-02-02 20:35         ` Casey Schaufler
2015-02-03 16:04       ` Serge E. Hallyn
2015-02-02 19:00     ` Casey Schaufler
2015-02-05  0:20       ` Serge E. Hallyn
2015-02-02 20:37     ` Andy Lutomirski
2015-02-02 20:54       ` Casey Schaufler
2015-02-03 15:51         ` Serge E. Hallyn
2015-02-03 16:37           ` Casey Schaufler
2015-02-03 17:28             ` Serge E. Hallyn
2015-02-03 17:50               ` Casey Schaufler
2015-02-03 19:45                 ` Christoph Lameter
2015-02-03 20:13                   ` Andy Lutomirski
2015-02-03 23:14                     ` Christoph Lameter
2015-02-03 23:17                       ` Andy Lutomirski
2015-02-04  2:27                         ` Christoph Lameter
2015-02-04  6:05                         ` Markku Savela
2015-02-04 13:17                           ` Christoph Lameter
2015-02-04 13:41                             ` Markku Savela
2015-02-04 14:56                               ` Jarkko Sakkinen
2015-02-03 15:17       ` Christoph Lameter
2015-02-03 15:40         ` Casey Schaufler
2015-02-03 15:46       ` Serge E. Hallyn
2015-02-03 17:19         ` Christoph Lameter
2015-02-03 17:29           ` Serge E. Hallyn
2015-02-25 21:50     ` Pavel Machek

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