From patchwork Tue Nov 21 22:01:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13463656 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="E0uJNgWO" Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4288B10FD; Tue, 21 Nov 2023 14:03:02 -0800 (PST) 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 3ALLlNiq020065; Tue, 21 Nov 2023 22:02:39 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=ll1jVWIn1WYeqe7oeR3JXJSFtnz9SYnx4hK39Q+YxwE=; b=E0uJNgWOSXQIqo86SlEdFe4HBO5qzUFPA0Wgq851WLA03vPxPYLpbPyQTwWe/7RrOKHG wLR+5iip0zovT+j+YxXN+3K3BmQ06jK5cGjSHsLdL/oBf0yMr5rtU/pd5MH0eb8EAImV PZADGYt7m5mEqqgIPTE4Hl/vrXWH4agqCkztnQ2mo9BjqGzuTkkVlWLqoK6a/StjHckd ZzlrzTKzNUaDU1COAHwxPdoSdQXEYpQ8b6rmg6S9DRoC/CdIOP0vCig/9BdLglsAv+B0 zNWhJePUOoFjFR605i/SAzEXvYfUuVsY59hfPXLaX8nx45bjYfX8OLW9D3hiuHzjnfeJ HA== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4s68bs8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:39 +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 3ALLo524026845; Tue, 21 Nov 2023 22:02:38 GMT Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh4s68br7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:38 +0000 Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLnYv6010672; Tue, 21 Nov 2023 22:02:36 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3uf93kujr7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:36 +0000 Received: from smtpav06.fra02v.mail.ibm.com (smtpav06.fra02v.mail.ibm.com [10.20.54.105]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 3ALM2Xf814877208 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Nov 2023 22:02:33 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 71D6720067; Tue, 21 Nov 2023 22:02:33 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0A6F220063; Tue, 21 Nov 2023 22:02:32 +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 22:02:31 +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 16/33] mm: slub: Let KMSAN access metadata Date: Tue, 21 Nov 2023 23:01:10 +0100 Message-ID: <20231121220155.1217090-17-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-ORIG-GUID: Kr3chWIa4VLpaiM7it2xt72zkEIATI76 X-Proofpoint-GUID: o0Elbdg3uNB8jhs-NEltJ60ebAxZlMmP 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=999 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 Building the kernel with CONFIG_SLUB_DEBUG and CONFIG_KMSAN causes KMSAN to complain about touching redzones in kfree(). Fix by extending the existing KASAN-related metadata_access_enable() and metadata_access_disable() functions to KMSAN. Signed-off-by: Ilya Leoshkevich Acked-by: Vlastimil Babka --- mm/slub.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/slub.c b/mm/slub.c index 169e5f645ea8..6e61c27951a4 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -700,10 +700,12 @@ static int disable_higher_order_debug; static inline void metadata_access_enable(void) { kasan_disable_current(); + kmsan_disable_current(); } static inline void metadata_access_disable(void) { + kmsan_enable_current(); kasan_enable_current(); }