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=0.6 required=3.0 tests=BIGNUM_EMAILS,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=no 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 5E75CC32759 for ; Thu, 15 Aug 2019 08:18:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3631421721 for ; Thu, 15 Aug 2019 08:18:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="FX49OUYI" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726865AbfHOISO (ORCPT ); Thu, 15 Aug 2019 04:18:14 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:51558 "EHLO userp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730869AbfHOISN (ORCPT ); Thu, 15 Aug 2019 04:18:13 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x7F8EUpI180838; Thu, 15 Aug 2019 08:18:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : mime-version : content-type; s=corp-2019-08-05; bh=HelmCFZbqj2rmdhjCFWAXjTPPw6e+Nfouk8FRPn/GBs=; b=FX49OUYITaQbV3OTdZIBcKa+07DGGdLiJMe/lSrakBGZaSci4pGq7+TJqok9VLlTLWtj 9WOFw9Pbxt6tlJjZgmtheeWbGgRL1Cdmvwq6LIoIXWAmsOFak6UZ9BI1g2Ucpqfvt34/ rqpehVfIpnfFfUdcVWnkQ2TaqN8Gwq/FZbfd1SRyo7wAj8QL0uPur/GaHgdHB2BiIGVe 1kcUjFXD4UvjtlDwuQXPz0FyUU8vyruzdNAHZsb9RFslCJk+isd16Ez3ELIjdPujo9kM YPCC3EexUyAyXLw7z1oBJQmNV5Veu6ca7Kp9nb1Ar4pjQIGeAcpLnU7Pctw0d+7HZEN1 DQ== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2120.oracle.com with ESMTP id 2u9pjqse55-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Aug 2019 08:18:11 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x7F8I5dr006659; Thu, 15 Aug 2019 08:18:10 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by aserp3020.oracle.com with ESMTP id 2ucpys4u71-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Aug 2019 08:18:10 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id x7F8IAH3012048; Thu, 15 Aug 2019 08:18:10 GMT Received: from mwanda (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Thu, 15 Aug 2019 01:18:09 -0700 Date: Thu, 15 Aug 2019 11:18:03 +0300 From: Dan Carpenter To: andreyknvl@google.com Cc: linux-kselftest@vger.kernel.org Subject: [bug report] selftests, arm64: add a selftest for passing tagged pointers to kernel Message-ID: <20190815081803.GA27238@mwanda> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9349 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=3 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=848 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908150088 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9349 signatures=668684 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=3 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=897 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908150087 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Hello Andrey Konovalov, The patch 9ce1263033cd: "selftests, arm64: add a selftest for passing tagged pointers to kernel" from Jul 23, 2019, leads to the following static checker warning: ./tools/testing/selftests/arm64/tags_test.c:25 main() error: uninitialized symbol 'tagged_ptr'. tools/testing/selftests/arm64/tags_test.c 14 int main(void) 15 { 16 static int tbi_enabled = 0; 17 struct utsname *ptr, *tagged_ptr; ^^^^^^^^^^ 18 int err; 19 20 if (prctl(PR_SET_TAGGED_ADDR_CTRL, PR_TAGGED_ADDR_ENABLE, 0, 0, 0) == 0) 21 tbi_enabled = 1; 22 ptr = (struct utsname *)malloc(sizeof(*ptr)); 23 if (tbi_enabled) 24 tagged_ptr = (struct utsname *)SET_TAG(ptr, 0x42); ^^^^^^^^^^^^^^^ No else path. 25 err = uname(tagged_ptr); 26 free(ptr); 27 28 return err; 29 } regards, dan carpenter