From patchwork Mon Dec 16 20:05:15 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexey Budankov X-Patchwork-Id: 11295167 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 D1BEB112B for ; Mon, 16 Dec 2019 20:05:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B95D4207FF for ; Mon, 16 Dec 2019 20:05:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727110AbfLPUF0 (ORCPT ); Mon, 16 Dec 2019 15:05:26 -0500 Received: from mga05.intel.com ([192.55.52.43]:55303 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726426AbfLPUF0 (ORCPT ); Mon, 16 Dec 2019 15:05:26 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 16 Dec 2019 12:05:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,322,1571727600"; d="scan'208";a="389578093" Received: from linux.intel.com ([10.54.29.200]) by orsmga005.jf.intel.com with ESMTP; 16 Dec 2019 12:05:24 -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 C3D875802E5; Mon, 16 Dec 2019 12:05:16 -0800 (PST) Subject: [PATCH v3 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 , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , Serge Hallyn , James Morris , Casey Schaufler Cc: Jiri Olsa , Andi Kleen , Stephane Eranian , Igor Lubashev , Alexander Shishkin , Namhyung Kim , Kees Cook , Jann Horn , Thomas Gleixner , Tvrtko Ursulin , "linux-security-module@vger.kernel.org" , "selinux@vger.kernel.org" , linux-kernel@vger.kernel.org, "linux-perf-users@vger.kernel.org" , intel-gfx@lists.freedesktop.org, Brendan Gregg , songliubraving@fb.com, "bpf@vger.kernel.org" , "linux-parisc@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" References: Organization: Intel Corp. Message-ID: <5d87f946-3588-7531-933b-fd1104ca0842@linux.intel.com> Date: Mon, 16 Dec 2019 23:05:15 +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: 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..c4208d027794 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 (!perfmon_capable()) return -EACCES; if (count != sizeof(uint32_t))