From patchwork Mon Aug 6 11:47:00 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasily Gorbik X-Patchwork-Id: 10556879 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1FDF813AC for ; Mon, 6 Aug 2018 11:47:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 02074292A2 for ; Mon, 6 Aug 2018 11:47:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id EAB0A292DB; Mon, 6 Aug 2018 11:47:12 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 92864292A2 for ; Mon, 6 Aug 2018 11:47:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729973AbeHFNzx (ORCPT ); Mon, 6 Aug 2018 09:55:53 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:32844 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727451AbeHFNzw (ORCPT ); Mon, 6 Aug 2018 09:55:52 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w76Bd0w2037293 for ; Mon, 6 Aug 2018 07:47:10 -0400 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0a-001b2d01.pphosted.com with ESMTP id 2kpme037ex-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 06 Aug 2018 07:47:09 -0400 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 6 Aug 2018 12:47:07 +0100 Received: from b06cxnps4075.portsmouth.uk.ibm.com (9.149.109.197) by e06smtp02.uk.ibm.com (192.168.101.132) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 6 Aug 2018 12:47:03 +0100 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id w76Bl22r40829154 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 6 Aug 2018 11:47:02 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9F44242041; Mon, 6 Aug 2018 14:47:11 +0100 (BST) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4D16642047; Mon, 6 Aug 2018 14:47:11 +0100 (BST) Received: from localhost (unknown [9.152.212.144]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Mon, 6 Aug 2018 14:47:11 +0100 (BST) Date: Mon, 6 Aug 2018 13:47:00 +0200 From: Vasily Gorbik To: Mathieu Desnoyers , Shuah Khan , Thomas Gleixner Cc: Peter Zijlstra , "Paul E. McKenney" , Boqun Feng , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH 0/1] rseq/selftests: add __rseq_abi misalignment check MIME-Version: 1.0 Content-Disposition: inline X-TM-AS-GCONF: 00 x-cbid: 18080611-0008-0000-0000-0000025DA5C2 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18080611-0009-0000-0000-000021C45555 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2018-08-06_07:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1807170000 definitions=main-1808060127 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP While implementing rseq selftest for s390 a glibc problem with tls variables alignment has been discovered. It turned out to be a general problem affecting several architectures. The bug opened for this problem: https://sourceware.org/bugzilla/show_bug.cgi?id=23403 There is no fix yet. On s390 __rseq_abi ends up aligned to 0x10 instead of 0x20 which makes rseq selftest fail every time. The change proposed adds __rseq_abi misalignment check, produces user friendly message and skips the test. Vasily Gorbik (1): rseq/selftests: add __rseq_abi misalignment check tools/testing/selftests/rseq/rseq.c | 19 +++++++++++++++++++ .../testing/selftests/rseq/run_param_test.sh | 4 ++-- 2 files changed, 21 insertions(+), 2 deletions(-)