From patchwork Tue Oct 2 13:12:43 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10623631 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DC17B14BD for ; Tue, 2 Oct 2018 13:13:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CDCC528938 for ; Tue, 2 Oct 2018 13:13:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CAD7C2897E; Tue, 2 Oct 2018 13:13:02 +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=-15.5 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI, USER_IN_DEF_DKIM_WL autolearn=ham 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 E198128900 for ; Tue, 2 Oct 2018 13:13:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727786AbeJBT4S (ORCPT ); Tue, 2 Oct 2018 15:56:18 -0400 Received: from mail-wm1-f67.google.com ([209.85.128.67]:38582 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728116AbeJBT4R (ORCPT ); Tue, 2 Oct 2018 15:56:17 -0400 Received: by mail-wm1-f67.google.com with SMTP id 193-v6so2144344wme.3 for ; Tue, 02 Oct 2018 06:12:58 -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 :mime-version:content-transfer-encoding; bh=jKYsVlgDfkccan6ieeKzVaMnn6OiwgAPoKEMH6GgvtQ=; b=dCBVcCGfEkOp2yZaISW/VbCXrMw/roS3ig2VtB55vdMEYEdcc/N0JZvN/VK0XUG/vE q8IQc15Veee7CyQPFcN4SsbYldChP/FYEqamRzfm+EMDwScW4NnC7+nL/WVcXY4YkxXH IaLDvKPYeiZLSd6eTTyOwGRK7yY7FV+zz24fER4CRRtpt6fdP7FHKNa+sGQGNFp4xqiT 2ikGu6YSkQfB33XL8xLyxL9AM7V5tbcy1QM6XaN4QBbjg/hZJkmhb7/WqbYk+Q0i72PC 1E3XO0yS2UZtrhy8q6K5bwYxsqbd2crZpd+uOHwvRVP1OGBqcxh74WmYSqKcp9Zs8/Nq KaDg== 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:mime-version:content-transfer-encoding; bh=jKYsVlgDfkccan6ieeKzVaMnn6OiwgAPoKEMH6GgvtQ=; b=MwEQWAqnkMvfhhjWQyvcqaRvlPBGKqzyg70J70UvTvvtKfUykdtOiXQUVHtqj/rdp3 6F1Fcq2fMvVRvDvvu+iPvLROBvOCYmAjcpgoGrXknb9AuoWid98okzZKmMAjYdCkdxCr pFVTSAVmAxHc/x6sgPEgBXDo9YXfEDnoeZM7W7ud6bBHl1mrYIca+2dl4AwMYKD+hYiV vNs1/dOoDt5pMn85fUFB6ewzAYOn8ckG64Ih6fNmjwQqCyNOmyvh1gRMKASs9bJDpYaE qoqZpyXga7T4/aMEgBwKRCThIr/km30mfBmhekUjP/e0Kma9N4gw/8CyUpY6wc13cPMs c9KQ== X-Gm-Message-State: ABuFfohk+4to2Bq3OIrNL8fxs4nAa03uYP57mo1YwX0IxAs+QYAp8EAO ZeSEmqXt3IIK44uFnUFPXar4zg== X-Google-Smtp-Source: ACcGV61lYLeUyN6R/Xs9pciDC3H43amhfekx+exm3H5Gj+xhTN4aSmtpre7zcIkfD40I7FhghfLIPg== X-Received: by 2002:a1c:8bcc:: with SMTP id n195-v6mr1947045wmd.118.1538485977684; Tue, 02 Oct 2018 06:12:57 -0700 (PDT) Received: from andreyknvl0.muc.corp.google.com ([2a00:79e0:15:10:84be:a42a:826d:c530]) by smtp.gmail.com with ESMTPSA id v10-v6sm17458681wrp.0.2018.10.02.06.12.56 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 02 Oct 2018 06:12:56 -0700 (PDT) From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , 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 , Luc Van Oostenryck , Andrey Konovalov Subject: [PATCH v7 8/8] selftests, arm64: add a selftest for passing tagged pointers to kernel Date: Tue, 2 Oct 2018 15:12:43 +0200 Message-Id: <3a2c0a6b2499a328cc9471d4095ae36f0f05252d.1538485901.git.andreyknvl@google.com> X-Mailer: git-send-email 2.19.0.605.g01d371f741-goog In-Reply-To: References: MIME-Version: 1.0 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; +}