From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 87C2E15AD3; Tue, 2 Jan 2024 15:09:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="svD4su6l" 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 402CRVvJ007618; Tue, 2 Jan 2024 15:09:35 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=pp1; bh=Z16gIvE6o/oyg7pKiGRgBezqdCKIKpf4AGEXuLsxRFw=; b=svD4su6l/twu+Zu2qoE0Qtzc2tJbxOj/21Pxy3greVvKpkioWAWCsLUbw1JSvcpIJ1AG 2PLbkB/D1Hcmp2UAVq3HHtelivWEgMRk9MOi5EcqcNupuCD7mH6rfg4VcMmig0ox5L8e z4funDZikQnB/ApbXAUzG5HHAmGxM5qn8nu7yIM7g4jdJc1UAqIpAmdpZrm8y4VB6qjc C0sAis8oUvaictM8VH3r4w3cQXUkVusrr/1G9FiB+zWhysS3SOTvXFyKvQSq9EKmB/SA h72VMSwYOdaVKPHcGpvajT1xHoQ952aP5IkHkFT7JDByszskj5K2OsgJbHFJl/30qSaN Ug== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3vcjghkfsn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jan 2024 15:09:34 +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 402EKo8H022188; Tue, 2 Jan 2024 15:09:34 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 3vcjghkfs7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jan 2024 15:09:34 +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 402Ds1wG017834; Tue, 2 Jan 2024 15:09:32 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3vawwynnak-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 02 Jan 2024 15:09:32 +0000 Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 402F9TLH19726960 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 2 Jan 2024 15:09:29 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 5DA132004E; Tue, 2 Jan 2024 15:09:29 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1E7A720040; Tue, 2 Jan 2024 15:09:28 +0000 (GMT) Received: from osiris (unknown [9.171.22.30]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTPS; Tue, 2 Jan 2024 15:09:28 +0000 (GMT) Date: Tue, 2 Jan 2024 16:09:26 +0100 From: Heiko Carstens To: Ilya Leoshkevich Cc: Alexander Gordeev , Alexander Potapenko , Andrew Morton , Christoph Lameter , David Rientjes , Joonsoo Kim , Marco Elver , Masami Hiramatsu , Pekka Enberg , Steven Rostedt , Vasily Gorbik , Vlastimil Babka , 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 Subject: Re: [PATCH v3 32/34] s390/unwind: Disable KMSAN checks Message-ID: <20240102150926.6306-I-hca@linux.ibm.com> References: <20231213233605.661251-1-iii@linux.ibm.com> <20231213233605.661251-33-iii@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20231213233605.661251-33-iii@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-GUID: exHf4oBJB85XIi_IDJ_Zx4a73A6HiVoO X-Proofpoint-ORIG-GUID: 2sCBYVkslnYpbOQdpV7tqP0ZF1S161uX X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-02_04,2024-01-02_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=425 lowpriorityscore=0 spamscore=0 mlxscore=0 impostorscore=0 phishscore=0 adultscore=0 clxscore=1015 suspectscore=0 bulkscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401020116 On Thu, Dec 14, 2023 at 12:24:52AM +0100, Ilya Leoshkevich wrote: > 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(+) Acked-by: Heiko Carstens