Message-ID: <9a9ccb28-3cbc-c0b1-71b2-26df08105b4a@redhat.com>
Date:   Wed, 29 May 2019 10:07:24 -0400
From:   Daniel Walsh <dwalsh@...hat.com>
To:     Paul Moore <paul@...l-moore.com>
Cc:     Richard Guy Briggs <rgb@...hat.com>,
        Steve Grubb <sgrubb@...hat.com>,
        Neil Horman <nhorman@...driver.com>,
        containers@...ts.linux-foundation.org, linux-api@...r.kernel.org,
        Linux-Audit Mailing List <linux-audit@...hat.com>,
        linux-fsdevel@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
        netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
        omosnace@...hat.com, dhowells@...hat.com, simo@...hat.com,
        Eric Paris <eparis@...isplace.org>,
        Serge Hallyn <serge@...lyn.com>, ebiederm@...ssion.com,
        Mrunal Patel <mpatel@...hat.com>
Subject: Re: [PATCH ghak90 V6 00/10] audit: implement container identifier

On 5/29/19 9:17 AM, Paul Moore wrote:
> On Wed, May 29, 2019 at 8:03 AM Daniel Walsh <dwalsh@...hat.com> wrote:
>> On 5/28/19 8:43 PM, Richard Guy Briggs wrote:
>>> On 2019-05-28 19:00, Steve Grubb wrote:
>>>> On Tuesday, May 28, 2019 6:26:47 PM EDT Paul Moore wrote:
>>>>> On Tue, May 28, 2019 at 5:54 PM Daniel Walsh <dwalsh@...hat.com> wrote:
>>>>>> On 4/22/19 9:49 AM, Paul Moore wrote:
>>>>>>> On Mon, Apr 22, 2019 at 7:38 AM Neil Horman <nhorman@...driver.com>
>>>> wrote:
>>>>>>>> On Mon, Apr 08, 2019 at 11:39:07PM -0400, Richard Guy Briggs wrote:
>>>>>>>>> Implement kernel audit container identifier.
>>>>>>>> I'm sorry, I've lost track of this, where have we landed on it? Are we
>>>>>>>> good for inclusion?
>>>>>>> I haven't finished going through this latest revision, but unless
>>>>>>> Richard made any significant changes outside of the feedback from the
>>>>>>> v5 patchset I'm guessing we are "close".
>>>>>>>
>>>>>>> Based on discussions Richard and I had some time ago, I have always
>>>>>>> envisioned the plan as being get the kernel patchset, tests, docs
>>>>>>> ready (which Richard has been doing) and then run the actual
>>>>>>> implemented API by the userland container folks, e.g. cri-o/lxc/etc.,
>>>>>>> to make sure the actual implementation is sane from their perspective.
>>>>>>> They've already seen the design, so I'm not expecting any real
>>>>>>> surprises here, but sometimes opinions change when they have actual
>>>>>>> code in front of them to play with and review.
>>>>>>>
>>>>>>> Beyond that, while the cri-o/lxc/etc. folks are looking it over,
>>>>>>> whatever additional testing we can do would be a big win.  I'm
>>>>>>> thinking I'll pull it into a separate branch in the audit tree
>>>>>>> (audit/working-container ?) and include that in my secnext kernels
>>>>>>> that I build/test on a regular basis; this is also a handy way to keep
>>>>>>> it based against the current audit/next branch.  If any changes are
>>>>>>> needed Richard can either chose to base those changes on audit/next or
>>>>>>> the separate audit container ID branch; that's up to him.  I've done
>>>>>>> this with other big changes in other trees, e.g. SELinux, and it has
>>>>>>> worked well to get some extra testing in and keep the patchset "merge
>>>>>>> ready" while others outside the subsystem look things over.
>>>>>> Mrunal Patel (maintainer of CRI-O) and I have reviewed the API, and
>>>>>> believe this is something we can work on in the container runtimes team
>>>>>> to implement the container auditing code in CRI-O and Podman.
>>>>> Thanks Dan.  If I pulled this into a branch and built you some test
>>>>> kernels to play with, any idea how long it might take to get a proof
>>>>> of concept working on the cri-o side?
>>>> We'd need to merge user space patches and let them use that instead of the
>>>> raw interface. I'm not going to merge user space until we are pretty sure the
>>>> patch is going into the kernel.
>>> I have an f29 test rpm of the userspace bits if that helps for testing:
>>>       http://people.redhat.com/~rbriggs/ghak90/git-1db7e21/
>>>
>>> Here's what it contains (minus the last patch):
>>>       https://github.com/linux-audit/audit-userspace/compare/master...rgbriggs:ghau40-containerid-filter.v7.0
>>>
>>>> -Steve
>>>>
>>>>> FWIW, I've also reached out to some of the LXC folks I know to get
>>>>> their take on the API.  I think if we can get two different container
>>>>> runtimes to give the API a thumbs-up then I think we are in good shape
>>>>> with respect to the userspace interface.
>>>>>
>>>>> I just finished looking over the last of the pending audit kernel
>>>>> patches that were queued waiting for the merge window to open so this
>>>>> is next on my list to look at.  I plan to start doing that
>>>>> tonight/tomorrow, and as long as the changes between v5/v6 are not
>>>>> that big, it shouldn't take too long.
>>> - RGB
>>>
>>> --
>>> Richard Guy Briggs <rgb@...hat.com>
>>> Sr. S/W Engineer, Kernel Security, Base Operating Systems
>>> Remote, Ottawa, Red Hat Canada
>>> IRC: rgb, SunRaycer
>>> Voice: +1.647.777.2635, Internal: (81) 32635
>> Our current thoughts are to put the setting of the ID inside of conmon,
>> and then launching the OCI Runtime.  In a perfect world this would
>> happen in the OCI Runtime, but we have no controls over different OCI
>> Runtimes.
>>
>> By putting it into conmon, then CRI-O and Podman will automatically get
>> the container id support.  After we have this we have to plumb it back
>> up through the contianer engines to be able to easily report the link
>> between the Container UUID and The Kernel Container Audit ID.
> I'm glad you guys have a plan, that's encouraging, but sadly I have no
> idea about the level of complexity/difficulty involved in modifying
> the various container bits for a proof-of-concept?  Are we talking a
> week or two?  A month?  More?
>
If we had the kernel and the libaudit api, it would involve a small
effort in conmon,  I would figure a few days for a POC.  Getting the
hole wiring into CRI-O and Podman, would be a little more effort.

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