linux-kernel - Re: [PATCH 1/2] audit: show user land backtrace as part of audit context messages

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Date:   Tue, 2 Feb 2021 21:43:58 +0000
From:   "Daniel Walker (danielwa)" <danielwa@...co.com>
To:     Paul Moore <paul@...l-moore.com>
CC:     "Victor Kamensky (kamensky)" <kamensky@...co.com>,
        Eric Paris <eparis@...hat.com>,
        "xe-linux-external(mailer list)" <xe-linux-external@...co.com>,
        "Ruslan Bilovol -X (rbilovol - GLOBALLOGIC INC at Cisco)" 
        <rbilovol@...co.com>,
        "linux-audit@...hat.com" <linux-audit@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] audit: show user land backtrace as part of audit
 context messages

On Tue, Feb 02, 2021 at 04:35:42PM -0500, Paul Moore wrote:
> On Tue, Feb 2, 2021 at 4:29 PM Daniel Walker <danielwa@...co.com> wrote:
> > From: Victor Kamensky <kamensky@...co.com>
> >
> > To efficiently find out where SELinux AVC denial is comming from
> > take backtrace of user land process and display it as type=UBACKTRACE
> > message that comes as audit context for SELinux AVC and other audit
> > messages ...
> 
> Have you tried the new perf tracepoint for SELinux AVC decisions that
> trigger an audit event?  It's a new feature for v5.10 and looks to
> accomplish most of what you are looking for with this patch.
> 
> * https://www.paul-moore.com/blog/d/2020/12/linux_v510.html

We haven't tried it, but I can look into it. We're not using v5.10 extensively
yet.

Daniel