From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10EF5C43381 for ; Fri, 15 Mar 2019 19:52:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D55022063F for ; Fri, 15 Mar 2019 19:52:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="cM+Q7dAj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727623AbfCOTwh (ORCPT ); Fri, 15 Mar 2019 15:52:37 -0400 Received: from mail-yw1-f73.google.com ([209.85.161.73]:48288 "EHLO mail-yw1-f73.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727581AbfCOTw3 (ORCPT ); Fri, 15 Mar 2019 15:52:29 -0400 Received: by mail-yw1-f73.google.com with SMTP id i21so13074868ywe.15 for ; Fri, 15 Mar 2019 12:52:28 -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=eZ7BHJXyN3220x7rl2oUpgQUqTcJDNuGZqyhRO+ZCi8=; b=cM+Q7dAjoclAUX9rjqJjU67fQhDAumMVHtRttx9Zyi+ZIB2DGBobAtyISQHWCe9SMA PZHknNkYe0zmRuTP34LxQfpP1xwZBreBZ0NXH/qnk7oR3nj566n4N1rsgxomhNTEh0Ty SDOfq37fZf5Cao/sGRM/bhdUdzoFls7cguuH3/lWtp/1jJdgVLG8lRoWShZq4z4XO9vT iGHxQ7GSrXCjG8EjxrW3Y9yARtTuqQUdg+mDtAYxXQ4FY7FbCfCGcfBBG46s71wuDA8g bS9aqYheYMuj6UjyFgDP+dwDAvq3VA5uUamhfzLklNEwcMfGzHMrGe5/jZLh7MutPKEK 1ixA== 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=eZ7BHJXyN3220x7rl2oUpgQUqTcJDNuGZqyhRO+ZCi8=; b=mKwsL5oE37OJ//9Pczq8ry8mDNXSN+4778+0403T5JwuNiZHxmYxW+pEyg+biS7Vzi D5A2MzZgvC/gmXQp/jFbqp2c1cfXQUDEMyzFdQsA1byeWq+HGXrRlxD+MrFcIug6nOnr xHPQsUC7yP212YOsrbJUrPpculKP9dcoFPBZwmi2YqXfwTst8dNqwhXDe4FJluvXgA2P L8AYd6s2s9a5HFA+hgoylcQ9VPErh37wej0uBXMOzZx8IcR68GkWeY1e/ZfD6qNwXDD4 M7BHx5KtKqxOnXGAmwP0aR9bq5ptabafiSIYMX6Zbz1QVYJtolpYTwFE+eZV7YvPPmW9 0xwA== X-Gm-Message-State: APjAAAU31iTD438yNi/L4QmkGMd0RpeIM4cFJwKltBo7REU86HkfxY8M MXFeh7WMLNCl/+KW1+/+P+/vbwk3oEt7Xu7+ X-Google-Smtp-Source: APXvYqz3F3hQJGqQ71GxABRK7OAGTM1YeC9p7knGv+mSIqj4Is7OoPrLZZdfGBYcCn7qYvsKmLT0kaCoS+EB48D+ X-Received: by 2002:a81:7acf:: with SMTP id v198mr2397024ywc.16.1552679548119; Fri, 15 Mar 2019 12:52:28 -0700 (PDT) Date: Fri, 15 Mar 2019 20:51:38 +0100 In-Reply-To: Message-Id: <8e7bfcb3812ae2a1f558864f56eec71a8f78fa2e.1552679409.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.360.g471c308f928-goog Subject: [PATCH v11 14/14] 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 Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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; +} -- 2.21.0.360.g471c308f928-goog