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=-5.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 D1329C3F2CF for ; Fri, 28 Feb 2020 09:00:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A42C720578 for ; Fri, 28 Feb 2020 09:00:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="hW/3pf0k" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726792AbgB1JAV (ORCPT ); Fri, 28 Feb 2020 04:00:21 -0500 Received: from userp2120.oracle.com ([156.151.31.85]:51660 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726148AbgB1JAV (ORCPT ); Fri, 28 Feb 2020 04:00:21 -0500 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 01S8ww1o082886; Fri, 28 Feb 2020 08:59:48 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=subject : to : cc : references : from : message-id : date : mime-version : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=PJ/XP3vDjKb9v3PFMFTKtPvAh8hN8E7B6BpTLxGNbp0=; b=hW/3pf0ke5V1TK4eytBJ1Z9k3yK9QcNTq4cLifBdC3xUxf83VkPrkE9W8lvNpfJYqtMz fkj/3s9FdU/m/jYaMY6ryiNlGI67JNlhQgmhu9y62QVoX3Zazc46xzIjogOVKDMMcxgv nacg5pxXsVpTkmhFWDKHvlKRlLQfPb6Vx9ydT7zX9dW1AqYlXCttAtpHlmmc1LxuE7QA QEzeo5WIem+8Z5Gcfq0ERWUoj91AjS7itgX4ShFoc2J6Jgr2+c3FORpPVpq+kzCOKBc3 0ckTHgM5lAoKSrjS7vH7CKuLHEdorhMi8TMqx5Ye5YVivHqbIreuOvSuYMpayG4N9Hnf 0w== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2120.oracle.com with ESMTP id 2ydct3hdsm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 Feb 2020 08:59:47 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 01S8wbpk153349; Fri, 28 Feb 2020 08:59:47 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3020.oracle.com with ESMTP id 2ydcsdd03d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 28 Feb 2020 08:59:47 +0000 Received: from abhmp0005.oracle.com (abhmp0005.oracle.com [141.146.116.11]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 01S8xjlO012683; Fri, 28 Feb 2020 08:59:45 GMT Received: from [10.39.209.75] (/10.39.209.75) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 28 Feb 2020 00:59:45 -0800 Subject: Re: [patch 3/8] x86/entry/common: Mark syscall entry points notrace/nokprobe To: Thomas Gleixner , LKML Cc: x86@kernel.org, Steven Rostedt , Brian Gerst , Juergen Gross , Paolo Bonzini , Arnd Bergmann References: <20200225220801.571835584@linutronix.de> <20200225221305.496864179@linutronix.de> From: Alexandre Chartre Organization: Oracle Corporation Message-ID: <4757d197-85a8-f81e-ece3-7b2994d935a9@oracle.com> Date: Fri, 28 Feb 2020 09:59:48 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.0 MIME-Version: 1.0 In-Reply-To: <20200225221305.496864179@linutronix.de> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9544 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 bulkscore=0 phishscore=0 mlxlogscore=999 spamscore=0 suspectscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002280074 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9544 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 spamscore=0 priorityscore=1501 malwarescore=0 adultscore=0 phishscore=0 mlxlogscore=999 mlxscore=0 suspectscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002280074 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/25/20 11:08 PM, Thomas Gleixner wrote: > Anything before enter_from_user_mode() is not safe to be traced or probed. > > Signed-off-by: Thomas Gleixner > --- > arch/x86/entry/common.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > Reviewed-by: Alexandre Chartre alex.