From patchwork Tue Nov 21 22:01:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13463673 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="SxOEgF2k" Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D75626AF; Tue, 21 Nov 2023 14:06:29 -0800 (PST) Received: from pps.filterd (m0353723.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLlRZr007601; Tue, 21 Nov 2023 22:06:14 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=w3qU2hLQPViAb6IauvgW6Gr8yASYdUVClk+0doiSRWs=; b=SxOEgF2kgmmUva2CthNSWR18hHL8V4G5GHjToXGpDK/yYBfUuPHnzVjp6qNC9pAGfKpO K2+lgfDkxttYSB9vTbXjqgBmmRXRy6oXVHZtryhxrZz3lWLfzk2vNimfBcotLSQeXw/G Y8x6+UdIM5/AbZ82UvyZk6E+emRBlFU9EYDbBFPnjSFdB5z8jFs+cSDf1C4EGSVM/WkK T7YEMKc1jcCGwyMg/lBVqGVpNxTghdXfdY+Ody2Rpapaq60KrPQxSqpyoerHY620j+Y3 IG3WiEBDPY5f2sjprKeX7pYV+RJlZYOWC5Fu50phO4x7XsMn6fmJlA7JvM/7rzhSTqYx Kg== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4dw10s7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:06:14 +0000 Received: from m0353723.ppops.net (m0353723.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3ALLQnKe012479; Tue, 21 Nov 2023 22:06:13 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 3uh4dw10pk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:06:13 +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 3ALLnSib004674; Tue, 21 Nov 2023 22:02:31 GMT Received: from smtprelay01.fra02v.mail.ibm.com ([9.218.2.227]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3uf7yykvgb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:30 +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 3ALM2Rff17629862 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Nov 2023 22:02:28 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CDE9720065; Tue, 21 Nov 2023 22:02:27 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 67E6D20063; Tue, 21 Nov 2023 22:02:26 +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 22:02:26 +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 13/33] kmsan: Introduce memset_no_sanitize_memory() Date: Tue, 21 Nov 2023 23:01:07 +0100 Message-ID: <20231121220155.1217090-14-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> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: AjHKs9P_s-EjY6PEk-BnWe3k9pw_FvZj X-Proofpoint-ORIG-GUID: P-jmXZ89sI19Qp3IwQq4whgKQV4vNRwT 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 mlxscore=0 mlxlogscore=799 spamscore=0 suspectscore=0 phishscore=0 priorityscore=1501 malwarescore=0 clxscore=1015 impostorscore=0 adultscore=0 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 Add a wrapper for memset() that prevents unpoisoning. This is useful for filling memory allocator redzones. Signed-off-by: Ilya Leoshkevich --- include/linux/kmsan.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/kmsan.h b/include/linux/kmsan.h index ff8fd95733fa..439df72c8dc6 100644 --- a/include/linux/kmsan.h +++ b/include/linux/kmsan.h @@ -345,4 +345,13 @@ static inline void *kmsan_get_metadata(void *addr, bool is_origin) #endif +/** + * memset_no_sanitize_memory() - memset() without the KMSAN instrumentation. + */ +__no_sanitize_memory +static inline void *memset_no_sanitize_memory(void *s, int c, size_t n) +{ + return memset(s, c, n); +} + #endif /* _LINUX_KMSAN_H */