linux-kernel - Re: [PATCH v1 0/3] Introduce CAP_SYS_PERFMON capability for secure Perf users groups

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Date:   Wed, 11 Dec 2019 16:24:35 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alexey Budankov <alexey.budankov@...ux.intel.com>
Cc:     Casey Schaufler <casey@...aufler-ca.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
        Andi Kleen <ak@...ux.intel.com>, elena.reshetova@...el.com,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jann Horn <jannh@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Stephane Eranian <eranian@...gle.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-security-module@...r.kernel.org, selinux@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 0/3] Introduce CAP_SYS_PERFMON capability for secure
 Perf users groups

On Wed, Dec 11, 2019 at 01:52:15PM +0300, Alexey Budankov wrote:
> Undoubtedly, SELinux is the powerful, mature, whole level of functionality that
> could provide benefits not only for perf_events subsystem. However perf_events
> is built around capabilities to provide access control to its functionality,
> thus perf_events would require considerable rework prior it could be controlled
> thru SELinux. 

You mean this:

  da97e18458fb ("perf_event: Add support for LSM and SELinux checks")

?

> Then the adoption could also require changes to the installed
> infrastructure just for the sake of adopting alternative access control mechanism.

This is still very much true.