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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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 X-Rspamd-Queue-Id: A1A1940009 X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: umbiq3gwkbijznj3bf9pjftnfpcfwx9m X-HE-Tag: 1700604380-817463 X-HE-Meta: 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 bRFfZYwJ wPS1ShgCto2AvIB8ZYOL5vgi85fkiUrf39fCxJx5r92Oly1QWNG3iSgsxOhRqk69SOoudAYeZmey8ktFsNoysUVRrcTAkRQngJeum2Lw1iMF/WEokscFATON2RD3J8aJD0EiJxUwwtvO/c1Kjm0BXG/OLFL4Gk7/7AAarFeawarKSufg5e0l4Sgr3AHX/MXFLNzdVjx5gWh20m7WvWnGtHi26GWwW+URjbMzcRSg5Xw5pUQpg4VykAMXFNZQE19wsxD+r X-Bogosity: Ham, tests=bogofilter, spamicity=0.000142, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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 */ -- 2.41.0