From patchwork Wed Jun 20 15:24:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10477737 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E086F60230 for ; Wed, 20 Jun 2018 15:25:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D1AB428F38 for ; Wed, 20 Jun 2018 15:25:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C671B28ECC; Wed, 20 Jun 2018 15:25:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.8 required=2.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6F97228ED6 for ; Wed, 20 Jun 2018 15:25:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932299AbeFTPYr (ORCPT ); Wed, 20 Jun 2018 11:24:47 -0400 Received: from mail-wm0-f66.google.com ([74.125.82.66]:36189 "EHLO mail-wm0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932419AbeFTPYm (ORCPT ); Wed, 20 Jun 2018 11:24:42 -0400 Received: by mail-wm0-f66.google.com with SMTP id v131-v6so240733wma.1 for ; Wed, 20 Jun 2018 08:24:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=lPw14ir5b4WYyY1IhNATkeAXJBB+IrqZlAw0DjD5TTM=; b=J3yTQZ1f7n+TJHf/9o+PbNCwiTIqOpqcpuAZAjAp4VpJr8b+6IVZWEChhyNuHzW5CN x4oTUXoG5gTru7+EZlpV0+yD73A92yWwf5YfPQlHQ9zLiJBc7LkRrzmsPwt3uYEf2/oM LVz3auXNJFbsfhnHnD2X82eqtqNWbBwp7AnDAnaCaJ6UmhDUhGQOMMkyHutfpiMe9lW/ SgUJY7JoHljiZD4AiI0oiW2yOirlZlqQ+BAXvs2qMnbx9TOq5w9vrg/smy9Hjul2PGzM VJByaKeRy33kp2BTwa/XsKcjG8HODhxRMyjGREC+8atPHrPzl1ne28mb7DDD8HLxdk4Q MXSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=lPw14ir5b4WYyY1IhNATkeAXJBB+IrqZlAw0DjD5TTM=; b=f/yvUEhtjPGdgyvWIrGmeqQGBPTRPmScYHCcHvzXo/H7P0zUozl0m6MFI9nac+vP5L 9Skru1N1Xa4oYXsIRTmi6ptmYiRvROey6mvEhQaiAt1owh3p0rOvX+g84ZLSR44vepwa wEKAEksUrFyZyrnwQFy3VTWFnDlSwgMqk6Wt1RWJ29CsTqipdPmhme7YU+9gjYPzQla2 cC4L4+OkZFeUQygg4Xm5edF8QUSoWwAjhJhJCDpP5Vvp806NQWZL7fkle90V/ECY3HZ0 vXhHsnDL5U0b7pdQ2pjJ7Q3Za9n7raN9ofiM4Ue50bhnoDBWGU/H3jcpoGX4q+bpLBID 6l5g== X-Gm-Message-State: APt69E2wq3h6jP+ScduVwMbuk6UReHJIWLI7K/DOG7kDRL4yI2pd+bs/ DxeJMFvfqvBcsDR3x9/d2m0qAw== X-Google-Smtp-Source: ADUXVKIbUbPExVtCKiqKrwked5t/GTLnIMMkKufQ8UBcZs1ajm7oykpuIbSr9xNNO4Yptr8aXZsq9w== X-Received: by 2002:a1c:7212:: with SMTP id n18-v6mr2173331wmc.5.1529508280581; Wed, 20 Jun 2018 08:24:40 -0700 (PDT) Received: from andreyknvl0.muc.corp.google.com ([2a00:79e0:15:10:84be:a42a:826d:c530]) by smtp.gmail.com with ESMTPSA id c11-v6sm3959244wrm.65.2018.06.20.08.24.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Jun 2018 08:24:39 -0700 (PDT) From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Al Viro , Andrey Konovalov , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya Subject: [PATCH v4 7/7] selftests, arm64: add a selftest for passing tagged pointers to kernel Date: Wed, 20 Jun 2018 17:24:26 +0200 Message-Id: <22a2fd7189189d0b67ea82e44f28a69627a6199e.1529507994.git.andreyknvl@google.com> X-Mailer: git-send-email 2.18.0.rc1.244.gcf134e6275-goog In-Reply-To: References: Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds a simple test, that calls the uname syscall with a tagged user pointer as an argument. Without the kernel accepting tagged user pointers the test fails with EFAULT. Signed-off-by: Andrey Konovalov --- tools/testing/selftests/arm64/.gitignore | 1 + tools/testing/selftests/arm64/Makefile | 11 +++++++++++ .../testing/selftests/arm64/run_tags_test.sh | 12 ++++++++++++ tools/testing/selftests/arm64/tags_test.c | 19 +++++++++++++++++++ 4 files changed, 43 insertions(+) create mode 100644 tools/testing/selftests/arm64/.gitignore create mode 100644 tools/testing/selftests/arm64/Makefile create mode 100755 tools/testing/selftests/arm64/run_tags_test.sh create mode 100644 tools/testing/selftests/arm64/tags_test.c diff --git a/tools/testing/selftests/arm64/.gitignore b/tools/testing/selftests/arm64/.gitignore new file mode 100644 index 000000000000..e8fae8d61ed6 --- /dev/null +++ b/tools/testing/selftests/arm64/.gitignore @@ -0,0 +1 @@ +tags_test diff --git a/tools/testing/selftests/arm64/Makefile b/tools/testing/selftests/arm64/Makefile new file mode 100644 index 000000000000..a61b2e743e99 --- /dev/null +++ b/tools/testing/selftests/arm64/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 + +# ARCH can be overridden by the user for cross compiling +ARCH ?= $(shell uname -m 2>/dev/null || echo not) + +ifneq (,$(filter $(ARCH),aarch64 arm64)) +TEST_GEN_PROGS := tags_test +TEST_PROGS := run_tags_test.sh +endif + +include ../lib.mk diff --git a/tools/testing/selftests/arm64/run_tags_test.sh b/tools/testing/selftests/arm64/run_tags_test.sh new file mode 100755 index 000000000000..745f11379930 --- /dev/null +++ b/tools/testing/selftests/arm64/run_tags_test.sh @@ -0,0 +1,12 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 + +echo "--------------------" +echo "running tags test" +echo "--------------------" +./tags_test +if [ $? -ne 0 ]; then + echo "[FAIL]" +else + echo "[PASS]" +fi diff --git a/tools/testing/selftests/arm64/tags_test.c b/tools/testing/selftests/arm64/tags_test.c new file mode 100644 index 000000000000..1452ed7d33f9 --- /dev/null +++ b/tools/testing/selftests/arm64/tags_test.c @@ -0,0 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include + +#define SHIFT_TAG(tag) ((uint64_t)(tag) << 56) +#define SET_TAG(ptr, tag) (((uint64_t)(ptr) & ~SHIFT_TAG(0xff)) | \ + SHIFT_TAG(tag)) + +int main(void) +{ + struct utsname utsname; + void *ptr = &utsname; + void *tagged_ptr = (void *)SET_TAG(ptr, 0x42); + int err = uname(tagged_ptr); + return err; +}