linux-kernel - Re: [PATCH v2 1/2] selinux: add tracepoint on denials

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Message-ID: <CA+zpnLcf94HGmE=CGH6nT8ya0oax5orXc5nP1qToUgaca6FeQg@mail.gmail.com>
Date:   Fri, 14 Aug 2020 15:05:05 +0200
From:   Thiébaud Weksteen <tweek@...gle.com>
To:     Stephen Smalley <stephen.smalley.work@...il.com>
Cc:     Paul Moore <paul@...l-moore.com>, Nick Kralevich <nnk@...gle.com>,
        Joel Fernandes <joelaf@...gle.com>,
        Peter Enderborg <peter.enderborg@...y.com>,
        Eric Paris <eparis@...isplace.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh@...nel.org>, Arnd Bergmann <arnd@...db.de>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        SElinux list <selinux@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] selinux: add tracepoint on denials

On Thu, Aug 13, 2020 at 5:41 PM Stephen Smalley
<stephen.smalley.work@...il.com> wrote:
>
> An explanation here of how one might go about decoding audited and
> tclass would be helpful to users (even better would be a script to do it
> for them).  Again, I know how to do that but not everyone using
> perf/ftrace will.

What about something along those lines:

The tclass value can be mapped to a class by searching
security/selinux/flask.h. The audited value is a bit field of the
permissions described in security/selinux/av_permissions.h for the
corresponding class.