From patchwork Mon Jan 20 08:36:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sandipan Das X-Patchwork-Id: 11341481 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 2115C1820 for ; Mon, 20 Jan 2020 08:38:23 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id E1D7E2077C for ; Mon, 20 Jan 2020 08:38:22 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E1D7E2077C 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 DBD8A6B05F1; Mon, 20 Jan 2020 03:38:20 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id D1DEB6B05F3; Mon, 20 Jan 2020 03:38:20 -0500 (EST) 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 BE4E36B05F4; Mon, 20 Jan 2020 03:38:20 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0009.hostedemail.com [216.40.44.9]) by kanga.kvack.org (Postfix) with ESMTP id A05526B05F1 for ; Mon, 20 Jan 2020 03:38:20 -0500 (EST) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 5BBF93499 for ; Mon, 20 Jan 2020 08:38:20 +0000 (UTC) X-FDA: 76397360760.25.soda99_48c22b5ed435b X-Spam-Summary: 2,0,0,c0b0e0ee549e525f,d41d8cd98f00b204,sandipan@linux.ibm.com,:shuah@kernel.org:linux-kselftest@vger.kernel.org:linux-arch@vger.kernel.org:fweimer@redhat.com:dave.hansen@intel.com:x86@kernel.org: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:linuxppc-dev@lists.ozlabs.org,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-62.2.0.100 64.100.201.201,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:2,LUA_SUMMARY:none X-HE-Tag: soda99_48c22b5ed435b X-Filterd-Recvd-Size: 5304 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by imf46.hostedemail.com (Postfix) with ESMTP for ; Mon, 20 Jan 2020 08:38:19 +0000 (UTC) Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00K8cHkH033442 for ; Mon, 20 Jan 2020 03:38:19 -0500 Received: from e06smtp04.uk.ibm.com (e06smtp04.uk.ibm.com [195.75.94.100]) by mx0b-001b2d01.pphosted.com with ESMTP id 2xmg7xr049-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 20 Jan 2020 03:38:18 -0500 Received: from localhost by e06smtp04.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) Mon, 20 Jan 2020 08:37:18 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00K8bGWK38993948 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 20 Jan 2020 08:37:16 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9AFD611C058; Mon, 20 Jan 2020 08:37:16 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 389D411C04C; Mon, 20 Jan 2020 08:37:14 +0000 (GMT) Received: from fir03.in.ibm.com (unknown [9.121.59.65]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 20 Jan 2020 08:37:14 +0000 (GMT) From: Sandipan Das To: shuah@kernel.org, linux-kselftest@vger.kernel.org Cc: linux-arch@vger.kernel.org, fweimer@redhat.com, dave.hansen@intel.com, x86@kernel.org, linuxram@us.ibm.com, mhocko@kernel.org, linux-mm@kvack.org, mingo@redhat.com, aneesh.kumar@linux.ibm.com, bauerman@linux.ibm.com, msuchanek@suse.de, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v17 19/24] selftests/vm/pkeys: Associate key on a mapped page and detect write violation Date: Mon, 20 Jan 2020 14:06:16 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-TM-AS-GCONF: 00 x-cbid: 20012008-0016-0000-0000-000002DEF947 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20012008-0017-0000-0000-000033419BCE Message-Id: <45459f250aa2d382163c73f497ac6931901f148b.1579507768.git.sandipan@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-19_08:2020-01-16,2020-01-19 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 impostorscore=0 suspectscore=0 bulkscore=0 spamscore=0 adultscore=0 phishscore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001200077 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 f65d384ef6a0..cb31a5cdf6d9 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,