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From: Paul Moore <paul@paul-moore.com>
To: Richard Guy Briggs <rgb@redhat.com>
Cc: containers@lists.linux-foundation.org, linux-api@vger.kernel.org,
	Linux-Audit Mailing List <linux-audit@redhat.com>,
	linux-fsdevel@vger.kernel.org,
	LKML <linux-kernel@vger.kernel.org>,
	netdev@vger.kernel.org, netfilter-devel@vger.kernel.org,
	sgrubb@redhat.com, Ondrej Mosnacek <omosnace@redhat.com>,
	dhowells@redhat.com, simo@redhat.com,
	Eric Paris <eparis@parisplace.org>,
	Serge Hallyn <serge@hallyn.com>,
	ebiederm@xmission.com, nhorman@tuxdriver.com,
	Dan Walsh <dwalsh@redhat.com>,
	mpatel@redhat.com
Subject: Re: [PATCH ghak90 V9 13/13] audit: add capcontid to set contid outside init_user_ns
Date: Sun, 5 Jul 2020 11:11:47 -0400	[thread overview]
Message-ID: <CAHC9VhRvuu-_+gh9ejr0sFDNR6erV2BAig6qrT9gOEB6GczXvw@mail.gmail.com> (raw)
In-Reply-To: <b6cb5500cfd7e8686ac2a7758103688c2da7f4ce.1593198710.git.rgb@redhat.com>

On Sat, Jun 27, 2020 at 9:24 AM Richard Guy Briggs <rgb@redhat.com> wrote:
>
> Provide a mechanism similar to CAP_AUDIT_CONTROL to explicitly give a
> process in a non-init user namespace the capability to set audit
> container identifiers of individual children.
>
> Provide the /proc/$PID/audit_capcontid interface to capcontid.
> Valid values are: 1==enabled, 0==disabled
>
> Writing a "1" to this special file for the target process $PID will
> enable the target process to set audit container identifiers of its
> descendants.
>
> A process must already have CAP_AUDIT_CONTROL in the initial user
> namespace or have had audit_capcontid enabled by a previous use of this
> feature by its parent on this process in order to be able to enable it
> for another process.  The target process must be a descendant of the
> calling process.
>
> Report this action in new message type AUDIT_SET_CAPCONTID 1022 with
> fields opid= capcontid= old-capcontid=
>
> Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
> ---
>  fs/proc/base.c             | 57 +++++++++++++++++++++++++++++++++++++++++++++-
>  include/linux/audit.h      | 14 ++++++++++++
>  include/uapi/linux/audit.h |  1 +
>  kernel/audit.c             | 38 ++++++++++++++++++++++++++++++-
>  4 files changed, 108 insertions(+), 2 deletions(-)

This seems very similar to the capable/ns_capable combination I
mentioned in patch 11/13; any reasons why you feel that this might be
a better approach?  My current thinking is that the capable/ns_capable
approach is preferable as it leverages existing kernel mechanisms and
doesn't require us to reinvent the wheel in the audit subsystem.


--
paul moore
www.paul-moore.com

      reply	other threads:[~2020-07-05 15:12 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-27 13:20 [PATCH ghak90 V9 00/13] audit: implement container identifier Richard Guy Briggs
2020-06-27 13:20 ` [PATCH ghak90 V9 01/13] audit: collect audit task parameters Richard Guy Briggs
2020-07-05 15:09   ` Paul Moore
2020-07-07  2:50     ` Richard Guy Briggs
2020-07-08  1:42       ` Paul Moore
2020-07-13 20:29         ` Richard Guy Briggs
2020-07-14  0:44           ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 02/13] audit: add container id Richard Guy Briggs
2020-07-04 13:29   ` Paul Moore
2020-07-04 13:30     ` Paul Moore
2020-07-05 15:09   ` Paul Moore
2020-07-29 20:05     ` Richard Guy Briggs
2020-08-21 19:36       ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 03/13] audit: read container ID of a process Richard Guy Briggs
2020-06-27 13:20 ` [PATCH ghak90 V9 04/13] audit: log drop of contid on exit of last task Richard Guy Briggs
2020-07-05 15:10   ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 05/13] audit: log container info of syscalls Richard Guy Briggs
2020-07-05 15:10   ` Paul Moore
2020-07-29 19:40     ` Richard Guy Briggs
2020-08-21 19:15       ` Paul Moore
2020-10-02 19:52         ` Richard Guy Briggs
2020-10-21 16:39           ` Richard Guy Briggs
2020-10-21 16:49             ` Steve Grubb
2020-10-21 17:53               ` Richard Guy Briggs
2020-10-23  1:21             ` Paul Moore
2020-10-23 20:40               ` Richard Guy Briggs
2020-10-28  1:35                 ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 06/13] audit: add contid support for signalling the audit daemon Richard Guy Briggs
2020-07-05 15:10   ` Paul Moore
2020-07-29 19:00     ` Richard Guy Briggs
2020-08-21 18:48       ` Paul Moore
2020-10-02 19:25         ` Richard Guy Briggs
2020-06-27 13:20 ` [PATCH ghak90 V9 07/13] audit: add support for non-syscall auxiliary records Richard Guy Briggs
2020-07-05 15:11   ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 08/13] audit: add containerid support for user records Richard Guy Briggs
2020-07-05 15:11   ` Paul Moore
2020-07-18  0:43     ` Richard Guy Briggs
2020-08-21 18:34       ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 09/13] audit: add containerid filtering Richard Guy Briggs
2020-06-27 13:20 ` [PATCH ghak90 V9 10/13] audit: add support for containerid to network namespaces Richard Guy Briggs
2020-07-05 15:11   ` Paul Moore
2020-07-21 22:05     ` Richard Guy Briggs
2020-06-27 13:20 ` [PATCH ghak90 V9 11/13] audit: contid check descendancy and nesting Richard Guy Briggs
2020-07-05 15:11   ` Paul Moore
2020-08-07 17:10     ` Richard Guy Briggs
2020-08-21 20:13       ` Paul Moore
2020-10-06 20:03         ` Richard Guy Briggs
2020-06-27 13:20 ` [PATCH ghak90 V9 12/13] audit: track container nesting Richard Guy Briggs
2020-07-05 15:11   ` Paul Moore
2020-06-27 13:20 ` [PATCH ghak90 V9 13/13] audit: add capcontid to set contid outside init_user_ns Richard Guy Briggs
2020-07-05 15:11   ` Paul Moore [this message]

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