Linux-man Archive on lore.kernel.org
 help / color / Atom feed
From: James Morris <jmorris@namei.org>
To: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Serge Hallyn <serge@hallyn.com>,
	Stephen Smalley <sds@tycho.nsa.gov>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ingo Molnar <mingo@kernel.org>,
	"joonas.lahtinen@linux.intel.com"
	<joonas.lahtinen@linux.intel.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Will Deacon <will@kernel.org>, Paul Mackerras <paulus@samba.org>,
	Helge Deller <deller@gmx.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andi Kleen <ak@linux.intel.com>,
	Stephane Eranian <eranian@google.com>,
	Igor Lubashev <ilubashe@akamai.com>, Jiri Olsa <jolsa@redhat.com>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"intel-gfx@lists.freedesktop.org"
	<intel-gfx@lists.freedesktop.org>,
	"linux-security-module@vger.kernel.org" 
	<linux-security-module@vger.kernel.org>,
	"selinux@vger.kernel.org" <selinux@vger.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
	oprofile-list@lists.sf.net,
	"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
	linux-man@vger.kernel.org
Subject: Re: [PATCH v7 05/12] drm/i915/perf: open access for CAP_PERFMON privileged process
Date: Wed, 19 Feb 2020 06:25:03 +1100 (AEDT)
Message-ID: <alpine.LRH.2.21.2002190624510.10165@namei.org> (raw)
In-Reply-To: <8b408c10-9bb0-4b08-8681-93c0f4a1132e@linux.intel.com>

On Mon, 17 Feb 2020, Alexey Budankov wrote:

> 
> Open access to i915_perf monitoring for CAP_PERFMON privileged process.
> Providing the access under CAP_PERFMON capability singly, without the
> rest of CAP_SYS_ADMIN credentials, excludes chances to misuse the
> credentials and makes operation more secure.
> 
> CAP_PERFMON implements the principal of least privilege for performance
> monitoring and observability operations (POSIX IEEE 1003.1e 2.2.2.39
> principle of least privilege: A security design principle that states
> that a process or program be granted only those privileges (e.g.,
> capabilities) necessary to accomplish its legitimate function, and only
> for the time that such privileges are actually required)
> 
> For backward compatibility reasons access to i915_events subsystem
> remains open for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN
> usage for secure i915_events monitoring is discouraged with respect to
> CAP_PERFMON capability.
> 
> Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>


Reviewed-by: James Morris <jamorris@linux.microsoft.com>


-- 
James Morris
<jmorris@namei.org>


  reply index

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-17  8:02 [PATCH v7 00/12] Introduce CAP_PERFMON to secure system performance monitoring and observability Alexey Budankov
2020-02-17  8:06 ` [PATCH v7 01/12] capabilities: introduce CAP_PERFMON to kernel and user space Alexey Budankov
2020-02-18 18:22   ` Stephen Smalley
2020-02-18 19:21   ` James Morris
2020-02-19  7:54     ` Alexey Budankov
2020-02-17  8:06 ` [PATCH v7 02/12] perf/core: open access to the core for CAP_PERFMON privileged process Alexey Budankov
2020-02-18 19:22   ` James Morris
2020-02-17  8:07 ` [PATCH v7 03/12] perf/core: open access to probes " Alexey Budankov
2020-02-18 19:22   ` James Morris
2020-02-17  8:08 ` [PATCH v7 04/12] perf tool: extend Perf tool with CAP_PERFMON capability support Alexey Budankov
2020-02-18 19:24   ` James Morris
2020-02-17  8:08 ` [PATCH v7 05/12] drm/i915/perf: open access for CAP_PERFMON privileged process Alexey Budankov
2020-02-18 19:25   ` James Morris [this message]
2020-02-17  8:09 ` [PATCH v7 06/12] trace/bpf_trace: " Alexey Budankov
2020-02-18 19:25   ` James Morris
2020-02-17  8:10 ` [PATCH v7 07/12] powerpc/perf: " Alexey Budankov
2020-02-18 19:28   ` James Morris
2020-02-17  8:10 ` [PATCH v7 08/12] parisc/perf: " Alexey Budankov
2020-02-18 19:29   ` James Morris
2020-02-17  8:11 ` [PATCH v7 09/12] drivers/perf: " Alexey Budankov
2020-02-18 19:43   ` James Morris
2020-02-17  8:12 ` [PATCH v7 10/12] drivers/oprofile: " Alexey Budankov
2020-02-18 19:44   ` James Morris
2020-02-17  8:12 ` [PATCH v7 11/12] doc/admin-guide: update perf-security.rst with CAP_PERFMON information Alexey Budankov
2020-02-17  8:13 ` [PATCH v7 12/12] doc/admin-guide: update kernel.rst " Alexey Budankov
2020-02-25  9:55 ` [PATCH v7 00/12] Introduce CAP_PERFMON to secure system performance monitoring and observability Alexey Budankov
2020-03-02  0:19   ` [Intel-gfx] " Serge Hallyn
2020-03-02 19:44     ` James Morris
2020-03-26 23:28     ` James Morris

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=alpine.LRH.2.21.2002190624510.10165@namei.org \
    --to=jmorris@namei.org \
    --cc=acme@kernel.org \
    --cc=ak@linux.intel.com \
    --cc=alexey.budankov@linux.intel.com \
    --cc=ast@kernel.org \
    --cc=deller@gmx.de \
    --cc=eranian@google.com \
    --cc=ilubashe@akamai.com \
    --cc=intel-gfx@lists.freedesktop.org \
    --cc=jolsa@redhat.com \
    --cc=joonas.lahtinen@linux.intel.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-doc@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-man@vger.kernel.org \
    --cc=linux-parisc@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=mingo@kernel.org \
    --cc=oprofile-list@lists.sf.net \
    --cc=paulus@samba.org \
    --cc=peterz@infradead.org \
    --cc=sds@tycho.nsa.gov \
    --cc=selinux@vger.kernel.org \
    --cc=serge@hallyn.com \
    --cc=tglx@linutronix.de \
    --cc=will@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-man Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-man/0 linux-man/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-man linux-man/ https://lore.kernel.org/linux-man \
		linux-man@vger.kernel.org
	public-inbox-index linux-man

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-man


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git