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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id C81D1C61D97 for ; Tue, 21 Nov 2023 22:03:03 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CC7F36B04DD; Tue, 21 Nov 2023 17:02:55 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C516C6B04DE; Tue, 21 Nov 2023 17:02:55 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A557F6B04DF; Tue, 21 Nov 2023 17:02:55 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 8BD406B04DD for ; Tue, 21 Nov 2023 17:02:55 -0500 (EST) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 60038C0A83 for ; Tue, 21 Nov 2023 22:02:55 +0000 (UTC) X-FDA: 81483337110.17.DCEAA12 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf01.hostedemail.com (Postfix) with ESMTP id 0B11540021 for ; Tue, 21 Nov 2023 22:02:52 +0000 (UTC) Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=kvOhNmDE; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf01.hostedemail.com: domain of iii@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=iii@linux.ibm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1700604173; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=0PRv+W5j3hmY0RY/lC7JHKrtcmpV2hH6yXsuJMvS/IA=; b=sL40MmrDGXFXfjBwjrIuDaxnOehpSdo6kxIEzJqC5p9/WfqJNqSeP/rk24IKv8xA1H5HRq fLhuNR+XS8FWfGgMaF6G4bnQlwauXjpCJ2KCWxnLuZMfvm9CXuyLWldAKtg1CjPNhqn60Y 7XqO/KDZ+ita5FpS5IBLPaYkkgNJHag= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=kvOhNmDE; dmarc=pass (policy=none) header.from=ibm.com; spf=pass (imf01.hostedemail.com: domain of iii@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=iii@linux.ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1700604173; a=rsa-sha256; cv=none; b=nXY8cq9MueCaXjmsYwBqu9wLarYONigE2046m/aQrTwDUjhCkx9VKtRlMxqYP4N9BiNTFV lYlseIgGtYt+omdBztrOGZidOX99pWTKjMWbtnLmfNoIAo5MGF3A35jmNKFs2W4okSDutd iZv3sReIOuiMmFojWCH/WuH4KdD7VhY= Received: from pps.filterd (m0353726.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLfHWB025433; Tue, 21 Nov 2023 22:02:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=0PRv+W5j3hmY0RY/lC7JHKrtcmpV2hH6yXsuJMvS/IA=; b=kvOhNmDEWq3hvFfk9Ss9Xl1pgQ0IasqVdhF8sMOHEw4wRWOMRUUpThYtVwKqzqdXA2be yZ3OGDzGmLQ/wQgYgQ/b0sBYxpym89id1YD1HEAsXtFQF3n6yfvsLUYv04pIcZx1NASn nB/Yk7sn/7T+moUdmdlYR13aC08Yoq3Ujyyj0GhFbbvBFp7QzgIU3mCg84NUGcZgQfsc AjdupX92Ei06BhnMFyONe4BtaXzQtKXGTaJkiWdwPEaRUBICQxztWCZr078Y5V/hx7XV 3Mso3ZJXyZwDFRu8fmExY06YgGJlPXbOOctrHW1EdFXCjnlEWD3gn7c0A3Kjesrpn6en bA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh46a1a9b-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:45 +0000 Received: from m0353726.ppops.net (m0353726.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3ALLxRhA014299; Tue, 21 Nov 2023 22:02:45 GMT Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh46a1a8n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:45 +0000 Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLnXLc011051; Tue, 21 Nov 2023 22:02:44 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 3uf9tkbbjq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:43 +0000 Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3ALM2ffQ17629878 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Nov 2023 22:02:41 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0E3C920067; Tue, 21 Nov 2023 22:02:41 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9D5C520063; Tue, 21 Nov 2023 22:02:39 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.179.23.98]) by smtpav06.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 21 Nov 2023 22:02:39 +0000 (GMT) From: Ilya Leoshkevich To: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Heiko Carstens , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka Cc: Christian Borntraeger , Dmitry Vyukov , Hyeonggon Yoo <42.hyeyoo@gmail.com>, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-s390@vger.kernel.org, linux-trace-kernel@vger.kernel.org, Mark Rutland , Roman Gushchin , Sven Schnelle , Ilya Leoshkevich Subject: [PATCH v2 20/33] kmsan: Accept ranges starting with 0 on s390 Date: Tue, 21 Nov 2023 23:01:14 +0100 Message-ID: <20231121220155.1217090-21-iii@linux.ibm.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231121220155.1217090-1-iii@linux.ibm.com> References: <20231121220155.1217090-1-iii@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: S8tTCIGaU--C4RVBZPx5Ly8NCbs0O93F X-Proofpoint-GUID: qMTuMTZ9GQusulDXz-MrPq75Kr6mBAKM X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-21_12,2023-11-21_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 phishscore=0 priorityscore=1501 bulkscore=0 adultscore=0 mlxscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 0B11540021 X-Stat-Signature: dqrk9rmz3j6f18771qm8migjsxcdoq9z X-Rspam-User: X-HE-Tag: 1700604172-317045 X-HE-Meta: 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 03vmHVje UDJCS/FE/W7AtmgF2sw2DgkhGyB4VRvlTIEocufCfFeoeI6tQiSw3ikOtNg6UaWjFOwVtCFnDt+CF8oB8Gjc5JbLKVV/r2iZIaoYDEOTc8AuS5B3SC0IoPcdj3wSIXW+Oa+SVfiNbM2FOkPiBWnyxaaZvL+hwOc83buROD3vPuABz5yB1640FNmKGalsDprt/sEVv09GZ+lsNGs7DWQuT+TD9w4zjNp5MX0TryKyigYTbv+OwPMONCB4HcNG72Z2fswr67ii2MgBH9yfi4RWn/hw7q2L+mizpiTIsB2iFT9tc4dSBDJfOyWtS/Sv6OyOuJQwZINFLV+tadic= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On s390 the virtual address 0 is valid (current CPU's lowcore is mapped there), therefore KMSAN should not complain about it. Disable the respective check on s390. There doesn't seem to be a Kconfig option to describe this situation, so explicitly check for s390. Reviewed-by: Alexander Potapenko Signed-off-by: Ilya Leoshkevich --- mm/kmsan/init.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/kmsan/init.c b/mm/kmsan/init.c index ffedf4dbc49d..7a3df4d359f8 100644 --- a/mm/kmsan/init.c +++ b/mm/kmsan/init.c @@ -33,7 +33,10 @@ static void __init kmsan_record_future_shadow_range(void *start, void *end) bool merged = false; KMSAN_WARN_ON(future_index == NUM_FUTURE_RANGES); - KMSAN_WARN_ON((nstart >= nend) || !nstart || !nend); + KMSAN_WARN_ON((nstart >= nend) || + /* Virtual address 0 is valid on s390. */ + (!IS_ENABLED(CONFIG_S390) && !nstart) || + !nend); nstart = ALIGN_DOWN(nstart, PAGE_SIZE); nend = ALIGN(nend, PAGE_SIZE); -- 2.41.0