linux-kernel - Re: [PATCH v3 3/3] selinux: add permission names to trace event

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Date:   Thu, 20 Aug 2020 22:22:30 -0400
From:   Paul Moore <paul@...l-moore.com>
To:     Stephen Smalley <stephen.smalley.work@...il.com>
Cc:     peter enderborg <peter.enderborg@...y.com>,
        Thiébaud Weksteen <tweek@...gle.com>,
        Nick Kralevich <nnk@...gle.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Eric Paris <eparis@...isplace.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        SElinux list <selinux@...r.kernel.org>
Subject: Re: [PATCH v3 3/3] selinux: add permission names to trace event

On Tue, Aug 18, 2020 at 8:14 AM Stephen Smalley
<stephen.smalley.work@...il.com> wrote:
> On Tue, Aug 18, 2020 at 4:11 AM peter enderborg <peter.enderborg@...y.com> wrote:

...

> > Is there any other things we need to fix? A part 1&2 now OK?
>
> They looked ok to me, but Paul should review them.

Patches 1 and 2 look fine to me with the small nits that Stephen
pointed out corrected.  I'm glad to see the information in string form
now, I think that will be a big help for people making use of this.

Unfortunately, I'm a little concerned about patch 3 for the reason
Stephen already mentioned.  While changes to the class mapping are
infrequent, they do happen, and I'm not very excited about adding it
to the userspace kAPI via a header.  Considering that the tracing
tools are going to be running on the same system that is being
inspected, perhaps the tracing tools could inspect
/sys/fs/selinux/class at runtime to query the permission mappings?
Stephen, is there a libselinux API which does this already?

-- 
paul moore
www.paul-moore.com