From patchwork Tue Nov 21 22:00:59 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13463660 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="mgOxiBg4" Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 37AFAD77; Tue, 21 Nov 2023 14:03:03 -0800 (PST) Received: from pps.filterd (m0353725.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALJ7T9P028372; Tue, 21 Nov 2023 22:02:36 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=VZEQ7DLTQn6OqQgSLo67A6SEZnv9L1qroObhIZ1xXOM=; b=mgOxiBg4YQz5R/dVa2UBOrxvIwaMV8gKaOSpP0nUGRkAfy8E2smngYYBkApy1Txj7klW w0u13EF6RKbN36fMUJN1lj3GsGNr4s5np+a9B8SIIMK5GjEm+XxWQL8kIz0rkGZVxazl 0D6rORF698IZcZDvAAztrAt/s9DZr3ZhZL2o3G9xwTw6SuyFRn/jz1ukEsYCIKmutRc5 2s+svlOInKpxadqUns6viTOHy9npVdnDYWDFF0ATufYBghBMBCKsBz9CoHyJa/Q1OaPn HAt4AuqpEqzznpoDgPVAzisghk75pPtb0sfd8uE3842O5CoqRRtzE2vFSpH9dvwHJ0m8 6w== Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh11we6y4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:35 +0000 Received: from m0353725.ppops.net (m0353725.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 3ALLuF5n031183; Tue, 21 Nov 2023 22:02:34 GMT Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 3uh11we6s7-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:34 +0000 Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 3ALLnGnm007559; Tue, 21 Nov 2023 22:02:15 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 3uf8knuq1f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Nov 2023 22:02:15 +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 3ALM2C8u22545102 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Nov 2023 22:02:12 GMT Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7D8DA20063; Tue, 21 Nov 2023 22:02:12 +0000 (GMT) Received: from smtpav06.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0EC9520065; Tue, 21 Nov 2023 22:02:11 +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 22:02:10 +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 05/33] kmsan: Fix is_bad_asm_addr() on arches with overlapping address spaces Date: Tue, 21 Nov 2023 23:00:59 +0100 Message-ID: <20231121220155.1217090-6-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: pQxE31YLEFvKPgXf6AYghjpxqouNt4v2 X-Proofpoint-ORIG-GUID: BV6bqdLe0fSLFh1pyvZJn_aJSFvjCpVt 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 spamscore=0 lowpriorityscore=0 bulkscore=0 impostorscore=0 suspectscore=0 adultscore=0 malwarescore=0 priorityscore=1501 phishscore=0 clxscore=1015 mlxlogscore=912 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2311210172 Comparing pointers with TASK_SIZE does not make sense when kernel and userspace overlap. Skip the comparison when this is the case. Signed-off-by: Ilya Leoshkevich Reviewed-by: Alexander Potapenko --- mm/kmsan/instrumentation.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/kmsan/instrumentation.c b/mm/kmsan/instrumentation.c index 470b0b4afcc4..8a1bbbc723ab 100644 --- a/mm/kmsan/instrumentation.c +++ b/mm/kmsan/instrumentation.c @@ -20,7 +20,8 @@ static inline bool is_bad_asm_addr(void *addr, uintptr_t size, bool is_store) { - if ((u64)addr < TASK_SIZE) + if (IS_ENABLED(CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE) && + (u64)addr < TASK_SIZE) return true; if (!kmsan_get_metadata(addr, KMSAN_META_SHADOW)) return true;