From patchwork Mon Dec 16 07:19:42 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Budankov X-Patchwork-Id: 11293495 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 99F55139A for ; Mon, 16 Dec 2019 07:19:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 80F0E20725 for ; Mon, 16 Dec 2019 07:19:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726622AbfLPHTx (ORCPT ); Mon, 16 Dec 2019 02:19:53 -0500 Received: from mga12.intel.com ([192.55.52.136]:9429 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726558AbfLPHTx (ORCPT ); Mon, 16 Dec 2019 02:19:53 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 15 Dec 2019 23:19:52 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,320,1571727600"; d="scan'208";a="217326996" Received: from linux.intel.com ([10.54.29.200]) by orsmga003.jf.intel.com with ESMTP; 15 Dec 2019 23:19:51 -0800 Received: from [10.251.95.214] (abudanko-mobl.ccr.corp.intel.com [10.251.95.214]) by linux.intel.com (Postfix) with ESMTP id 77F91580890; Sun, 15 Dec 2019 23:19:43 -0800 (PST) Subject: [PATCH v2 7/7] parisc/perf: open access for CAP_SYS_PERFMON privileged process From: Alexey Budankov To: Peter Zijlstra , Arnaldo Carvalho de Melo , Ingo Molnar , jani.nikula@linux.intel.com, joonas.lahtinen@linux.intel.com, rodrigo.vivi@intel.com, Alexei Starovoitov , james.bottomley@hansenpartnership.com, benh@kernel.crashing.org, Casey Schaufler , serge@hallyn.com, James Morris Cc: Jiri Olsa , Andi Kleen , Stephane Eranian , Igor Lubashev , Alexander Shishkin , Namhyung Kim , Jann Horn , Kees Cook , Thomas Gleixner , Tvrtko Ursulin , linux-security-module@vger.kernel.org, selinux@vger.kernel.org, linux-kernel , "linux-perf-users@vger.kernel.org" , intel-gfx@lists.freedesktop.org, bgregg@netflix.com, Song Liu , bpf@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org References: <26101427-c0a3-db9f-39e9-9e5f4ddd009c@linux.intel.com> Organization: Intel Corp. Message-ID: <22abd684-706c-1b3c-3858-e756217c9243@linux.intel.com> Date: Mon, 16 Dec 2019 10:19:42 +0300 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: <26101427-c0a3-db9f-39e9-9e5f4ddd009c@linux.intel.com> Content-Language: en-US Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org Open access to monitoring for CAP_SYS_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_SYS_PERFMON capability. Signed-off-by: Alexey Budankov --- arch/parisc/kernel/perf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/parisc/kernel/perf.c b/arch/parisc/kernel/perf.c index 676683641d00..58e7d1444e4f 100644 --- a/arch/parisc/kernel/perf.c +++ b/arch/parisc/kernel/perf.c @@ -300,7 +300,7 @@ static ssize_t perf_write(struct file *file, const char __user *buf, else return -EFAULT; - if (!capable(CAP_SYS_ADMIN)) + if (!(capable(CAP_SYS_PERFMON) || capable(CAP_SYS_ADMIN))) return -EACCES; if (count != sizeof(uint32_t))