From patchwork Mon Mar 18 17:17:45 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrey Konovalov X-Patchwork-Id: 10858207 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 3606C6C2 for ; Mon, 18 Mar 2019 17:18:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0F2B82936B for ; Mon, 18 Mar 2019 17:18:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 02F94293A0; Mon, 18 Mar 2019 17:18:34 +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 D08352936B for ; Mon, 18 Mar 2019 17:18:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728072AbfCRRSd (ORCPT ); Mon, 18 Mar 2019 13:18:33 -0400 Received: from mail-yw1-f73.google.com ([209.85.161.73]:49113 "EHLO mail-yw1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728061AbfCRRSa (ORCPT ); Mon, 18 Mar 2019 13:18:30 -0400 Received: by mail-yw1-f73.google.com with SMTP id i21so23342071ywe.15 for ; Mon, 18 Mar 2019 10:18:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=oy4XANA3tbe0/ZzrN3csQScarn1wlppfqaNsYi+hu9yuogoof3toGpiFXztOXvuSIL sBMFi0kVcDXhngeXsQ7F8TmpGE5J+YQspuv0IpgE54s+w7Cg2pGhzbc2pvAhwbRlgRSf xxwSPdpD5FpRcK2p/HjiDpbPI1EyCU7DiI66uatDv7wNJCkN8c1ymIFnrzCAUJy1zI9w EBzcRuRAINzPha2QHRdT3Y/yumtuj6+oKyiMBKvPeEcFGxcVQSEWK2xmW+D8MpHwLMzD P1fusntFSsCEjlr/dNu9pSGP243BnVEPFZOFUAmm90Toh6sJXriJra44fSRj/3Svjc/P //6g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=SY+rnApq6/oVhWiUcTCOnBf6TcIl5V0rPtZOMhbp5Gs=; b=RNkdhmD0Z1x3UWy/KaA2xI03eHber1Gv4UoqR0Ys44GHOAPgnHrLLoKoiQv6wbNinM 4C/MRXTrOWFoC3vx6r0edoU0YmeyLTEmfxgFnE+1egGJtBf8bmPg+FYvlsaqfBDymYLq WyMQDYMp6mR1poOPDGa1TOJaxcR65zIrrLLg8QiBc+ZATTek2h7cOtxa+kJcm9Tkc1xd 0t+VOuUspYy4XuzQKgi5xHgdxptaBkd/5+biUUrqgymE8XpMZG+MmjuZhESUJyQzOgxW 48I7TXlkcVpXV0ku43HDn8oYkuyenMw3l8873un7VL33dcUVDOLQnz5LGt3BcjSF9wgm I0tw== X-Gm-Message-State: APjAAAUtQJNUyAt9xXWpgbKOIgNO+pxuikuwVgb040LDry564kqK7LMs KZhbJsvvIorZecuh+3dMo8BpWENAerMUjNhr X-Google-Smtp-Source: APXvYqzr9z29O2HnZauXqiNwIgfSTj1CVWyp96d9Efuk7E9e9YiyE5NAQn/RDJZ9P2HjA7rm0gHQWomDM7zPkQh8 X-Received: by 2002:a81:6184:: with SMTP id v126mr9643066ywb.17.1552929509203; Mon, 18 Mar 2019 10:18:29 -0700 (PDT) Date: Mon, 18 Mar 2019 18:17:45 +0100 In-Reply-To: Message-Id: <0b4d5fb8364a30a51868b6691fff503878d3d82b.1552929301.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v12 13/13] selftests, arm64: add a selftest for passing tagged pointers to kernel 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 , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@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 , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov 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 is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. 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 | 21 +++++++++++++++++++ 4 files changed, 45 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..2bd1830a7ebe --- /dev/null +++ b/tools/testing/selftests/arm64/tags_test.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#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 *ptr = (struct utsname *)malloc(sizeof(*ptr)); + void *tagged_ptr = (void *)SET_TAG(ptr, 0x42); + int err = uname(tagged_ptr); + + free(ptr); + return err; +}