From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x225CJ5Ornt4IQdJy9zPkzdM03kqZzfaec9rVC0fFt3Atl4xk2CTadJYjAuo7Ggx2Mb4HfVeV ARC-Seal: i=1; a=rsa-sha256; t=1516647356; cv=none; d=google.com; s=arc-20160816; b=zjgUKrVBC9BLjg/uJG93L0FFeYEB8f2EIBhABpNM/Yq7QKm1lyt1/7UKWRlzJ0/ve8 5Cxh1UAMoH/KlYsdv87E7pVRFqCbTsbzYWe2iQrEzD515KlbfEN/ZhpUSRu3AxLajbFD OwbyjSjbh8QeZ1OElVtXatZ7ZuCCWC/wcDTkls8LyE4EZT+zUrtX8RVIll2++/h+M0T9 /NGpq6fh3g5btNPIiErR466fIO/miW0UKkCPhv5pz8yUhbIXQS/uKNS6cQu5Su+b0CVn oCrBFuMsA7nVF0WJisUhj4RQEkt0ibBT9vvtd/kksv3EVkHpzkDEecQR2fHUjEn46cHi 3mZA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=QxNqgRVyS8VMHKORvqyX27OeWH575bIP4uabCk+SH2M=; b=Yq6IZeWMyF4CjBpx9WFPkeK/jZQ+Z9pdAoiHYARZB68Aka9E806WFG9Ioa7ISIkP8v anVrIavj1g7TomdVMw+/1lHSu6PS+Rbwsrid4lNsvOSRttEu+6FZbyqE/1IXWTcYbSDh t5t5cN3598ha3+yBvDD+mzezFfm2iwGtJbNw2gKp/rNtPIzIg+qDoOTZOJOkawyzM6w5 zO3t1zifRI2B4+gwqK/BS5vWMQtP0aW5WxaD+NKky32scTMIHGTNAVnXHpWqW0F3ywEY 4YGQcpS8Rn8WMHx+NMFKoH7foZrX8eyyqfzg/zoqUjZLSKy2o2PXfORFjUUaHbilCUXE 1SKg== ARC-Authentication-Results: i=1; mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20161025 header.b=rsYgzGnN; spf=pass (google.com: best guess record for domain of linux-kselftest-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kselftest-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Authentication-Results: mx.google.com; dkim=neutral (body hash did not verify) header.i=@gmail.com header.s=20161025 header.b=rsYgzGnN; spf=pass (google.com: best guess record for domain of linux-kselftest-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kselftest-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=ibm.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751599AbeAVSz4 (ORCPT ); Mon, 22 Jan 2018 13:55:56 -0500 Received: from mail-qt0-f195.google.com ([209.85.216.195]:33833 "EHLO mail-qt0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751506AbeAVSxn (ORCPT ); Mon, 22 Jan 2018 13:53:43 -0500 From: Ram Pai To: shuahkh@osg.samsung.com, linux-kselftest@vger.kernel.org Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, akpm@linux-foundation.org, dave.hansen@intel.com, benh@kernel.crashing.org, paulus@samba.org, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, hbabu@us.ibm.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com, ebiederm@xmission.com, linuxram@us.ibm.com, arnd@arndb.de Subject: [PATCH v10 18/24] selftests/vm: associate key on a mapped page and detect write violation Date: Mon, 22 Jan 2018 10:52:11 -0800 Message-Id: <1516647137-11174-19-git-send-email-linuxram@us.ibm.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1516647137-11174-1-git-send-email-linuxram@us.ibm.com> References: <1516647137-11174-1-git-send-email-linuxram@us.ibm.com> Sender: linux-kselftest-owner@vger.kernel.org X-Mailing-List: linux-kselftest@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: =?utf-8?q?1590320019173200921?= X-GMAIL-MSGID: =?utf-8?q?1590320019173200921?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: detect write-violation on a page to which write-disabled key is associated much after the page is mapped. Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 1d3f596..f90a8b6 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -1034,6 +1034,17 @@ 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); @@ -1330,6 +1341,7 @@ void test_mprotect_pkey_on_unsupported_cpu(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, -- 1.7.1