From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67932C3A59F for ; Thu, 29 Aug 2019 14:42:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2F11A233FF for ; Thu, 29 Aug 2019 14:42:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567089756; bh=eYjq6GUXpRYwgKHl/LiHXRqmXoJV3CT31W26/C70iDM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=MUKekyaBfEcZN5kSdDZKLsXJElXhOnOc3fZpRsEp1kxN88VuRXcW4Li0UDTgjc6mS cPnwUrYhPCklcTOS0P/ce2J5N8Q4cartjpzliKcfsr2NhhEr4jytHpiL1GqCJWNcoX XAndPWOjLx43GBptkcNQxjGaenI1iqxwLdxa70KY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728250AbfH2Omf (ORCPT ); Thu, 29 Aug 2019 10:42:35 -0400 Received: from mail.kernel.org ([198.145.29.99]:43330 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728332AbfH2Ojw (ORCPT ); Thu, 29 Aug 2019 10:39:52 -0400 Received: from quaco.ghostprotocols.net (unknown [179.97.35.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id ADA492341B; Thu, 29 Aug 2019 14:39:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567089591; bh=eYjq6GUXpRYwgKHl/LiHXRqmXoJV3CT31W26/C70iDM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=04m8JHHWi/iiVzDc0izQaftbw8yY0DBgbtTriY6areeoD+GdE1G4+Inz7WB1Ghjh5 86bvKCXICTEtyGH8AdON9BbdGeFXpBCKaqtoOc1G7xuA/eBrtWJBJyLi6NEDIU4VRY TKfLq2sYkl4dZJfrpWzFzrHU60yZ5W/HYmtd8KXU= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Igor Lubashev , Arnaldo Carvalho de Melo , Mathieu Poirier , Alexander Shishkin , Alexey Budankov , James Morris , Peter Zijlstra , Suzuki Poulouse , linux-arm-kernel@lists.infradead.org Subject: [PATCH 03/37] perf tools: Use CAP_SYS_ADMIN with perf_event_paranoid checks Date: Thu, 29 Aug 2019 11:38:43 -0300 Message-Id: <20190829143917.29745-4-acme@kernel.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190829143917.29745-1-acme@kernel.org> References: <20190829143917.29745-1-acme@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Igor Lubashev The kernel is using CAP_SYS_ADMIN instead of euid==0 to override perf_event_paranoid check. Make perf do the same. Signed-off-by: Arnaldo Carvalho de Melo Acked-by: Jiri Olsa Tested-by: Mathieu Poirier Reviewed-by: Mathieu Poirier # coresight part Cc: Alexander Shishkin Cc: Alexey Budankov Cc: James Morris Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Suzuki Poulouse Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1566869956-7154-3-git-send-email-ilubashe@akamai.com Signed-off-by: Igor Lubashev Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/arch/arm/util/cs-etm.c | 3 ++- tools/perf/arch/arm64/util/arm-spe.c | 3 ++- tools/perf/arch/x86/util/intel-bts.c | 3 ++- tools/perf/arch/x86/util/intel-pt.c | 2 +- tools/perf/util/evsel.c | 2 +- 5 files changed, 8 insertions(+), 5 deletions(-) diff --git a/tools/perf/arch/arm/util/cs-etm.c b/tools/perf/arch/arm/util/cs-etm.c index a185dab2d903..5d856edc412b 100644 --- a/tools/perf/arch/arm/util/cs-etm.c +++ b/tools/perf/arch/arm/util/cs-etm.c @@ -18,6 +18,7 @@ #include "../../util/record.h" #include "../../util/auxtrace.h" #include "../../util/cpumap.h" +#include "../../util/event.h" #include "../../util/evlist.h" #include "../../util/evsel.h" #include "../../util/pmu.h" @@ -254,7 +255,7 @@ static int cs_etm_recording_options(struct auxtrace_record *itr, struct perf_pmu *cs_etm_pmu = ptr->cs_etm_pmu; struct evsel *evsel, *cs_etm_evsel = NULL; struct perf_cpu_map *cpus = evlist->core.cpus; - bool privileged = (geteuid() == 0 || perf_event_paranoid() < 0); + bool privileged = perf_event_paranoid_check(-1); int err = 0; ptr->evlist = evlist; diff --git a/tools/perf/arch/arm64/util/arm-spe.c b/tools/perf/arch/arm64/util/arm-spe.c index cdd5c0c84183..c7b38f09260f 100644 --- a/tools/perf/arch/arm64/util/arm-spe.c +++ b/tools/perf/arch/arm64/util/arm-spe.c @@ -12,6 +12,7 @@ #include #include "../../util/cpumap.h" +#include "../../util/event.h" #include "../../util/evsel.h" #include "../../util/evlist.h" #include "../../util/session.h" @@ -67,7 +68,7 @@ static int arm_spe_recording_options(struct auxtrace_record *itr, container_of(itr, struct arm_spe_recording, itr); struct perf_pmu *arm_spe_pmu = sper->arm_spe_pmu; struct evsel *evsel, *arm_spe_evsel = NULL; - bool privileged = geteuid() == 0 || perf_event_paranoid() < 0; + bool privileged = perf_event_paranoid_check(-1); struct evsel *tracking_evsel; int err; diff --git a/tools/perf/arch/x86/util/intel-bts.c b/tools/perf/arch/x86/util/intel-bts.c index 1f2cf612bc9c..16d26ea701ad 100644 --- a/tools/perf/arch/x86/util/intel-bts.c +++ b/tools/perf/arch/x86/util/intel-bts.c @@ -12,6 +12,7 @@ #include #include "../../util/cpumap.h" +#include "../../util/event.h" #include "../../util/evsel.h" #include "../../util/evlist.h" #include "../../util/session.h" @@ -108,7 +109,7 @@ static int intel_bts_recording_options(struct auxtrace_record *itr, struct perf_pmu *intel_bts_pmu = btsr->intel_bts_pmu; struct evsel *evsel, *intel_bts_evsel = NULL; const struct perf_cpu_map *cpus = evlist->core.cpus; - bool privileged = geteuid() == 0 || perf_event_paranoid() < 0; + bool privileged = perf_event_paranoid_check(-1); btsr->evlist = evlist; btsr->snapshot_mode = opts->auxtrace_snapshot_mode; diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c index 44cfe72c1a4c..746981c82a16 100644 --- a/tools/perf/arch/x86/util/intel-pt.c +++ b/tools/perf/arch/x86/util/intel-pt.c @@ -579,7 +579,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr, bool have_timing_info, need_immediate = false; struct evsel *evsel, *intel_pt_evsel = NULL; const struct perf_cpu_map *cpus = evlist->core.cpus; - bool privileged = geteuid() == 0 || perf_event_paranoid() < 0; + bool privileged = perf_event_paranoid_check(-1); u64 tsc_bit; int err; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index fa676355559e..7c704b8f0e5c 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -282,7 +282,7 @@ struct evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx) static bool perf_event_can_profile_kernel(void) { - return geteuid() == 0 || perf_event_paranoid() == -1; + return perf_event_paranoid_check(-1); } struct evsel *perf_evsel__new_cycles(bool precise) -- 2.21.0