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>,
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<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>,
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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>,
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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"
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<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>,
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"linux-perf-users@vger.kernel.org"
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oprofile-list@lists.sf.net
Subject: [PATCH v5 07/10] powerpc/perf: open access for CAP_PERFMON privileged process
Date: Mon, 20 Jan 2020 14:30:51 +0300 [thread overview]
Message-ID: <b74a3983-8e41-aba7-c18d-b16eff6fd5e5@linux.intel.com> (raw)
In-Reply-To: <0548c832-7f4b-dc4c-8883-3f2b6d351a08@linux.intel.com>
Open access to monitoring for CAP_PERFMON privileged processes.
For backward compatibility reasons access to the monitoring remains
open for CAP_SYS_ADMIN privileged processes but CAP_SYS_ADMIN usage
for secure 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 the operations more secure.
Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
---
arch/powerpc/perf/imc-pmu.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index cb50a9e1fd2d..e837717492e4 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -898,7 +898,7 @@ static int thread_imc_event_init(struct perf_event *event)
if (event->attr.type != event->pmu->type)
return -ENOENT;
- if (!capable(CAP_SYS_ADMIN))
+ if (!perfmon_capable())
return -EACCES;
/* Sampling not supported */
@@ -1307,7 +1307,7 @@ static int trace_imc_event_init(struct perf_event *event)
if (event->attr.type != event->pmu->type)
return -ENOENT;
- if (!capable(CAP_SYS_ADMIN))
+ if (!perfmon_capable())
return -EACCES;
/* Return if this is a couting event */
--
2.20.1
next prev parent reply other threads:[~2020-01-20 11:31 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 ` [PATCH v5 06/10] trace/bpf_trace: " Alexey Budankov
2020-01-20 11:30 ` Alexey Budankov [this message]
2020-01-22 11:02 ` [PATCH v5 07/10] powerpc/perf: " 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
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