linux-parisc.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Alexey Budankov <alexey.budankov@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Ingo Molnar <mingo@redhat.com>,
	"jani.nikula@linux.intel.com" <jani.nikula@linux.intel.com>,
	"joonas.lahtinen@linux.intel.com"
	<joonas.lahtinen@linux.intel.com>,
	"rodrigo.vivi@intel.com" <rodrigo.vivi@intel.com>,
	"benh@kernel.crashing.org" <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	"james.bottomley@hansenpartnership.com" 
	<james.bottomley@hansenpartnership.com>,
	Serge Hallyn <serge@hallyn.com>, James Morris <jmorris@namei.org>,
	Will Deacon <will.deacon@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Robert Richter <rric@kernel.org>,
	Alexei Starovoitov <ast@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>, Andi Kleen <ak@linux.intel.com>,
	Stephane Eranian <eranian@google.com>,
	Igor Lubashev <ilubashe@akamai.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Song Liu <songliubraving@fb.com>,
	Lionel Landwerlin <lionel.g.landwerlin@intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	"linux-security-module@vger.kernel.org" 
	<linux-security-module@vger.kernel.org>,
	"selinux@vger.kernel.org" <selinux@vger.kernel.org>,
	"intel-gfx@lists.freedesktop.org"
	<intel-gfx@lists.freedesktop.org>,
	"linux-parisc@vger.kernel.org" <linux-parisc@vger.kernel.org>,
	"linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>,
	linux-arm-kernel@lists.infradead.org,
	"linux-perf-users@vger.kernel.org"
	<linux-perf-users@vger.kernel.org>,
	oprofile-list@lists.sf.net
Subject: [PATCH v5 06/10] trace/bpf_trace: open access for CAP_PERFMON privileged process
Date: Mon, 20 Jan 2020 14:29:45 +0300	[thread overview]
Message-ID: <4c91a53f-0124-0816-917d-a8cb232dc6a1@linux.intel.com> (raw)
In-Reply-To: <0548c832-7f4b-dc4c-8883-3f2b6d351a08@linux.intel.com>


Open access to bpf_trace monitoring for CAP_PERFMON privileged processes.
For backward compatibility reasons access to bpf_trace monitoring remains
open for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage for
secure bpf_trace monitoring is discouraged with respect to CAP_PERFMON
capability. Providing the access under CAP_PERFMON capability singly,
without the rest of CAP_SYS_ADMIN credentials, excludes chances to misuse
the credentials and makes operations more secure.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
---
 kernel/trace/bpf_trace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index e5ef4ae9edb5..334f1d71ebb1 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1395,7 +1395,7 @@ int perf_event_query_prog_array(struct perf_event *event, void __user *info)
 	u32 *ids, prog_cnt, ids_len;
 	int ret;
 
-	if (!capable(CAP_SYS_ADMIN))
+	if (!perfmon_capable())
 		return -EPERM;
 	if (event->attr.type != PERF_TYPE_TRACEPOINT)
 		return -EINVAL;
-- 
2.20.1


  parent reply	other threads:[~2020-01-20 11:30 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20 11:18 [PATCH v5 0/10] Introduce CAP_PERFMON to secure system performance monitoring and observability Alexey Budankov
2020-01-20 11:23 ` [PATCH v5 01/10] capabilities: introduce CAP_PERFMON to kernel and user space Alexey Budankov
2020-01-21 14:43   ` Stephen Smalley
2020-01-21 17:30     ` Alexey Budankov
2020-01-21 17:55       ` Alexei Starovoitov
2020-01-21 18:27         ` Alexey Budankov
2020-01-22 10:45           ` Alexey Budankov
2020-01-22 14:07             ` Stephen Smalley
2020-01-22 14:25               ` Alexey Budankov
2020-02-06 18:03                 ` Alexey Budankov
2020-02-07 11:38                   ` Thomas Gleixner
2020-02-07 13:39                     ` Alexey Budankov
2020-02-20 13:05                       ` Alexey Budankov
2020-02-12  8:53               ` Alexey Budankov
2020-02-12 13:32                 ` Stephen Smalley
2020-02-12 13:53                   ` Alexey Budankov
2020-02-12 15:21                     ` Stephen Smalley
2020-02-12 15:45                       ` Stephen Smalley
2020-02-12 16:56                         ` Alexey Budankov
2020-02-12 17:09                           ` Stephen Smalley
2020-02-13  9:05                             ` Alexey Budankov
2020-02-12 16:16                       ` Alexey Budankov
2020-01-20 11:24 ` [PATCH v5 02/10] perf/core: open access to the core for CAP_PERFMON privileged process Alexey Budankov
2020-01-20 11:26 ` [PATCH v5 03/10] perf/core: open access to anon probes " Alexey Budankov
2020-01-20 11:27 ` [PATCH v5 04/10] perf tool: extend Perf tool with CAP_PERFMON capability support Alexey Budankov
2020-01-20 11:28 ` [PATCH v5 05/10] drm/i915/perf: open access for CAP_PERFMON privileged process Alexey Budankov
2020-01-20 11:29 ` Alexey Budankov [this message]
2020-01-20 11:30 ` [PATCH v5 07/10] powerpc/perf: " Alexey Budankov
2020-01-22 11:02   ` Anju T Sudhakar
2020-01-20 11:31 ` [PATCH v5 08/10] parisc/perf: " Alexey Budankov
2020-01-20 11:32 ` [PATCH v5 09/10] drivers/perf: " Alexey Budankov
2020-01-20 11:33 ` [PATCH v5 10/10] drivers/oprofile: " Alexey Budankov

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=4c91a53f-0124-0816-917d-a8cb232dc6a1@linux.intel.com \
    --to=alexey.budankov@linux.intel.com \
    --cc=acme@kernel.org \
    --cc=ak@linux.intel.com \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=ast@kernel.org \
    --cc=benh@kernel.crashing.org \
    --cc=eranian@google.com \
    --cc=ilubashe@akamai.com \
    --cc=intel-gfx@lists.freedesktop.org \
    --cc=james.bottomley@hansenpartnership.com \
    --cc=jani.nikula@linux.intel.com \
    --cc=jmorris@namei.org \
    --cc=jolsa@redhat.com \
    --cc=joonas.lahtinen@linux.intel.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-parisc@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=linuxppc-dev@lists.ozlabs.org \
    --cc=lionel.g.landwerlin@intel.com \
    --cc=mark.rutland@arm.com \
    --cc=mingo@redhat.com \
    --cc=mpe@ellerman.id.au \
    --cc=namhyung@kernel.org \
    --cc=oprofile-list@lists.sf.net \
    --cc=paulus@samba.org \
    --cc=peterz@infradead.org \
    --cc=rodrigo.vivi@intel.com \
    --cc=rric@kernel.org \
    --cc=selinux@vger.kernel.org \
    --cc=serge@hallyn.com \
    --cc=songliubraving@fb.com \
    --cc=tglx@linutronix.de \
    --cc=will.deacon@arm.com \
    /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
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).