From patchwork Tue Mar 31 09:58:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sandipan Das X-Patchwork-Id: 11467155 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 14A8B1805 for ; Tue, 31 Mar 2020 09:59:35 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DEF602073B for ; Tue, 31 Mar 2020 09:59:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DEF602073B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 7FD9C6B0095; Tue, 31 Mar 2020 05:59:33 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 788226B0098; Tue, 31 Mar 2020 05:59:33 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 696496B0099; Tue, 31 Mar 2020 05:59:33 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0198.hostedemail.com [216.40.44.198]) by kanga.kvack.org (Postfix) with ESMTP id 4850C6B0095 for ; Tue, 31 Mar 2020 05:59:33 -0400 (EDT) Received: from smtpin09.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 17F752491 for ; Tue, 31 Mar 2020 09:59:33 +0000 (UTC) X-FDA: 76655210226.09.patch89_707219aa93536 X-Spam-Summary: 2,0,0,83be990a382ff936,d41d8cd98f00b204,sandipan@linux.ibm.com,,RULES_HIT:41:355:379:541:800:960:973:988:989:1260:1261:1345:1359:1437:1535:1541:1711:1730:1747:1777:1792:2393:2559:2562:2901:3138:3139:3140:3141:3142:3352:3865:3867:3871:4321:5007:6119:6261:6742:7576:10004:11026:11657:11658:11914:12043:12297:12438:12555:12679:12895:13069:13255:13311:13357:14181:14384:14394:14721:21080:21451:21611:21617:21966:30054:30056:30064,0,RBL:148.163.158.5:@linux.ibm.com:.lbl8.mailshell.net-64.100.201.201 62.2.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:none,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: patch89_707219aa93536 X-Filterd-Recvd-Size: 5357 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf25.hostedemail.com (Postfix) with ESMTP for ; Tue, 31 Mar 2020 09:59:32 +0000 (UTC) Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 02V9ZlvV134979 for ; Tue, 31 Mar 2020 05:59:32 -0400 Received: from e06smtp07.uk.ibm.com (e06smtp07.uk.ibm.com [195.75.94.103]) by mx0b-001b2d01.pphosted.com with ESMTP id 303uj3413e-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Tue, 31 Mar 2020 05:59:32 -0400 Received: from localhost by e06smtp07.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Tue, 31 Mar 2020 10:59:23 +0100 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02V9wKZv47710564 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 31 Mar 2020 09:58:20 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D2AC64C046; Tue, 31 Mar 2020 09:59:23 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 19A934C050; Tue, 31 Mar 2020 09:59:21 +0000 (GMT) Received: from fir03.in.ibm.com (unknown [9.121.59.65]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 31 Mar 2020 09:59:20 +0000 (GMT) From: Sandipan Das To: akpm@linux-foundation.org Cc: linux-kselftest@vger.kernel.org, linux-arch@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, x86@kernel.org, linux-mm@kvack.org, fweimer@redhat.com, linuxram@us.ibm.com, mhocko@kernel.org, mingo@redhat.com, aneesh.kumar@linux.ibm.com, bauerman@linux.ibm.com, msuchanek@suse.de, mpe@ellerman.id.au, shuah@kernel.org, Dave Hansen Subject: [PATCH v19 18/24] selftests/vm/pkeys: Associate key on a mapped page and detect write violation Date: Tue, 31 Mar 2020 15:28:19 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-TM-AS-GCONF: 00 x-cbid: 20033109-0028-0000-0000-000003EF45D7 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20033109-0029-0000-0000-000024B4C7F2 Message-Id: <6bfe3b3832f8bcfb07d7f2cf116b45197f4587dd.1585646528.git.sandipan@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-03-31_03:2020-03-30,2020-03-31 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=1 impostorscore=0 adultscore=0 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 bulkscore=0 priorityscore=1501 phishscore=0 clxscore=1015 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003310081 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Ram Pai Detect write-violation on a page to which write-disabled key is associated much after the page is mapped. cc: Dave Hansen cc: Florian Weimer Signed-off-by: Ram Pai Acked-by: Dave Hansen Signed-off-by: Sandipan Das --- tools/testing/selftests/vm/protection_keys.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index f65d384ef6a0d..cb31a5cdf6d90 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -1002,6 +1002,17 @@ void test_read_of_access_disabled_region_with_page_already_mapped(int *ptr, expected_pkey_fault(pkey); } +void test_write_of_write_disabled_region_with_page_already_mapped(int *ptr, + u16 pkey) +{ + *ptr = __LINE__; + dprintf1("disabling write access; after accessing the page, " + "to PKEY[%02d], doing write\n", pkey); + pkey_write_deny(pkey); + *ptr = __LINE__; + expected_pkey_fault(pkey); +} + void test_write_of_write_disabled_region(int *ptr, u16 pkey) { dprintf1("disabling write access to PKEY[%02d], doing write\n", pkey); @@ -1410,6 +1421,7 @@ void (*pkey_tests[])(int *ptr, u16 pkey) = { test_read_of_access_disabled_region, test_read_of_access_disabled_region_with_page_already_mapped, test_write_of_write_disabled_region, + test_write_of_write_disabled_region_with_page_already_mapped, test_write_of_access_disabled_region, test_kernel_write_of_access_disabled_region, test_kernel_write_of_write_disabled_region,