From patchwork Tue Nov 21 22:01:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13463698 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 9C375C61D98 for ; Tue, 21 Nov 2023 22:15:37 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id EC5196B04C0; Tue, 21 Nov 2023 17:15:36 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id E4DBE6B04F7; Tue, 21 Nov 2023 17:15:36 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id CA0246B04F8; Tue, 21 Nov 2023 17:15:36 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id B4BA16B04C0 for ; Tue, 21 Nov 2023 17:15:36 -0500 (EST) Received: from smtpin10.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 8F924160B90 for ; Tue, 21 Nov 2023 22:15:36 +0000 (UTC) X-FDA: 81483369072.10.2962101 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by imf30.hostedemail.com (Postfix) with ESMTP id 2897F80013 for ; Tue, 21 Nov 2023 22:15:33 +0000 (UTC) Authentication-Results: imf30.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=h2hOgRWf; spf=pass (imf30.hostedemail.com: domain of iii@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=iii@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1700604934; a=rsa-sha256; cv=none; b=tZ5CmtM+nj7p6ADCM0DB1ne2MmhZRFw49ZV8wt7zR94Jac2sPFpLvt5MlB52FKoB1ZrSjL /UmMWmZqZIEmzVmQSOzBOcxLNzX66x/fIN0AWrAp1W0Kmmo/91rmbMJoVJq2cdhYfMOrQN /q/5+USqIIEGM3MI7ewlDvvhkClDaOg= ARC-Authentication-Results: i=1; imf30.hostedemail.com; dkim=pass header.d=ibm.com header.s=pp1 header.b=h2hOgRWf; spf=pass (imf30.hostedemail.com: domain of iii@linux.ibm.com designates 148.163.156.1 as permitted sender) smtp.mailfrom=iii@linux.ibm.com; dmarc=pass (policy=none) header.from=ibm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1700604934; 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=EE06ddWkGjUoLWQv6bK2fGVp2A6oQUBHyPN+VxPRzzo=; b=Eo5crG0XG+zrnK1+wkv2i84QSyzEZJ6yaJWkDTDHvxiG1yXefOPkNN648NHFcL2HpwGIRe YaeAGlu+jJpfmhRD7+sQBS2GQA7ui7s8mQZ9FgmpdtcODUG4fyz2wA4eZV6LFwyZZbXJW1 eFX44DXZwYl9aUYflKmeYwvFnb/xvwM= Received: from pps.filterd (m0353728.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLlOsS020122; Tue, 21 Nov 2023 22:03:08 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=EE06ddWkGjUoLWQv6bK2fGVp2A6oQUBHyPN+VxPRzzo=; b=h2hOgRWfPECwKwBcNQrjLD+PvLStASPkSovv9rh/O/pqJS+chgrrJ93CoPUS2VZe8fP0 k0UNr5mfboaxo743fH6elrh0qujQyNv/58YWKB7XiP7brbBMKRfkuINNMqHp815hU/Gv ZdS2SvR/TOTflDVvfXBTsQuQxG/UbOqNpTqeZB10qYXDyNNXASfmyfSq6B4sTXnA2jwv RtaN68mVvuY3uPSFZjJ2di9OKD9shuf5RzQc5axKmTFZ9qgMubUP17/tiDQ0Wo2JYqvW eQM983a+BZ671YZ310QUTA7YeASsGFDDpQOap9LInqVQkYsuAu1PMLOjlrZBUWJ8geVC Ig== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4s68ca4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:03:08 +0000 Received: from m0353728.ppops.net (m0353728.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3ALLmWB5023308; Tue, 21 Nov 2023 22:03:07 GMT Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4s68c8d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:03:07 +0000 Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLnSj4004674; Tue, 21 Nov 2023 22:03:06 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3uf7yykvpq-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:03:06 +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 3ALM32Jm18416340 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Nov 2023 22:03:03 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id DEEFE20067; Tue, 21 Nov 2023 22:03:02 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 72A0F20063; Tue, 21 Nov 2023 22:03:01 +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 22:03:01 +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 31/33] s390/unwind: Disable KMSAN checks Date: Tue, 21 Nov 2023 23:01:25 +0100 Message-ID: <20231121220155.1217090-32-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 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: t0hiZOuilBS-pse6Lg4l-pzI0i9JU7L2 X-Proofpoint-GUID: bHxC-ytlmBvIktmBU67IBrMaMN8bDPe8 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 suspectscore=0 priorityscore=1501 spamscore=0 impostorscore=0 mlxlogscore=865 bulkscore=0 mlxscore=0 malwarescore=0 adultscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 2897F80013 X-Stat-Signature: 4uf53tr8c6b146dgm3dionfq5ha3yuzf X-Rspam-User: X-HE-Tag: 1700604933-723807 X-HE-Meta: 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 mYIg8y6Q 66mVUJyuH3UVFIFGw9KIMq2u5Hra8a5uteWbfLAKhCdQJiCMhfELRYRfhwYzgJz/jiKq4O6sQ4/edwwAyMSPkiFgeFTP9h8I1RihmVPTUYFdA+GDzJavBWPgkaa28ObesetKdMJiecWg0z3morvx+ebVVBpadGkwfsW0t9F/lRlQVQEvc4n+6OW6FcEuGOuF388q/+qABkYf7a4e6nf4C8IVce47Fb6ZQ4UknkVOm4g0uu8M= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000004, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: The unwind code can read uninitialized frames. Furthermore, even in the good case, KMSAN does not emit shadow for backchains. Therefore disable it for the unwinding functions. Reviewed-by: Alexander Potapenko Signed-off-by: Ilya Leoshkevich --- arch/s390/kernel/unwind_bc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/s390/kernel/unwind_bc.c b/arch/s390/kernel/unwind_bc.c index 0ece156fdd7c..cd44be2b6ce8 100644 --- a/arch/s390/kernel/unwind_bc.c +++ b/arch/s390/kernel/unwind_bc.c @@ -49,6 +49,8 @@ static inline bool is_final_pt_regs(struct unwind_state *state, READ_ONCE_NOCHECK(regs->psw.mask) & PSW_MASK_PSTATE; } +/* Avoid KMSAN false positives from touching uninitialized frames. */ +__no_kmsan_checks bool unwind_next_frame(struct unwind_state *state) { struct stack_info *info = &state->stack_info; @@ -118,6 +120,8 @@ bool unwind_next_frame(struct unwind_state *state) } EXPORT_SYMBOL_GPL(unwind_next_frame); +/* Avoid KMSAN false positives from touching uninitialized frames. */ +__no_kmsan_checks void __unwind_start(struct unwind_state *state, struct task_struct *task, struct pt_regs *regs, unsigned long first_frame) {