From patchwork Wed Aug 9 17:04:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 13348219 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97CEEC001E0 for ; Wed, 9 Aug 2023 17:04:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232580AbjHIREp (ORCPT ); Wed, 9 Aug 2023 13:04:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232424AbjHIREn (ORCPT ); Wed, 9 Aug 2023 13:04:43 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 316DC2100; Wed, 9 Aug 2023 10:04:43 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 42BE811FB; Wed, 9 Aug 2023 10:05:25 -0700 (PDT) Received: from donnerap.arm.com (donnerap.manchester.arm.com [10.32.100.58]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 144543F59C; Wed, 9 Aug 2023 10:04:41 -0700 (PDT) From: Andre Przywara To: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , Shuah Khan Cc: linux-security-module@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/2] selftests: landlock: allow other ABI versions Date: Wed, 9 Aug 2023 18:04:34 +0100 Message-Id: <20230809170435.1312162-2-andre.przywara@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230809170435.1312162-1-andre.przywara@arm.com> References: <20230809170435.1312162-1-andre.przywara@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: At the moment the abi_version subtest of the landlock selftest expects exactly version 3 of the landlock syscall ABI. However older kernels returned a smaller number (or even -1, for the initial code), and the kselftest documentation states that older kernels should still be supported. Relax the test for the return value, to just not accept 0, which was never a value returned by this syscall (the initial ABI version was 1). This fixes kselftests runs on older kernels like on my Ubuntu 20.04 system. Signed-off-by: Andre Przywara --- tools/testing/selftests/landlock/base_test.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c index 792c3f0a59b4f..1e3b6de57e80e 100644 --- a/tools/testing/selftests/landlock/base_test.c +++ b/tools/testing/selftests/landlock/base_test.c @@ -75,7 +75,7 @@ TEST(abi_version) const struct landlock_ruleset_attr ruleset_attr = { .handled_access_fs = LANDLOCK_ACCESS_FS_READ_FILE, }; - ASSERT_EQ(3, landlock_create_ruleset(NULL, 0, + ASSERT_NE(0, landlock_create_ruleset(NULL, 0, LANDLOCK_CREATE_RULESET_VERSION)); ASSERT_EQ(-1, landlock_create_ruleset(&ruleset_attr, 0, From patchwork Wed Aug 9 17:04:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andre Przywara X-Patchwork-Id: 13348220 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 86914C04FE0 for ; Wed, 9 Aug 2023 17:04:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232599AbjHIREp (ORCPT ); Wed, 9 Aug 2023 13:04:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46234 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232461AbjHIREo (ORCPT ); Wed, 9 Aug 2023 13:04:44 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 4CE0E2107; Wed, 9 Aug 2023 10:04:44 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5F5F6139F; Wed, 9 Aug 2023 10:05:26 -0700 (PDT) Received: from donnerap.arm.com (donnerap.manchester.arm.com [10.32.100.58]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 310843F59C; Wed, 9 Aug 2023 10:04:43 -0700 (PDT) From: Andre Przywara To: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , Shuah Khan Cc: linux-security-module@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] selftests: landlock: skip all tests without landlock syscall Date: Wed, 9 Aug 2023 18:04:35 +0100 Message-Id: <20230809170435.1312162-3-andre.przywara@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230809170435.1312162-1-andre.przywara@arm.com> References: <20230809170435.1312162-1-andre.przywara@arm.com> MIME-Version: 1.0 Precedence: bulk List-ID: "landlock" is a relatively new syscall, and most defconfigs do not enable it (yet). On systems without this syscall available, the selftests fail at the moment, instead of being skipped. Check the availability of the landlock system call before executing each test, and skip the rest of the tests if we get an ENOSYS back. Signed-off-by: Andre Przywara --- tools/testing/selftests/landlock/base_test.c | 27 ++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/tools/testing/selftests/landlock/base_test.c b/tools/testing/selftests/landlock/base_test.c index 1e3b6de57e80e..c539cec775fba 100644 --- a/tools/testing/selftests/landlock/base_test.c +++ b/tools/testing/selftests/landlock/base_test.c @@ -21,12 +21,20 @@ #define O_PATH 010000000 #endif +static bool has_syscall(void) +{ + return landlock_create_ruleset(NULL, 0, 0) == -1 && errno != ENOSYS; +} + TEST(inconsistent_attr) { const long page_size = sysconf(_SC_PAGESIZE); char *const buf = malloc(page_size + 1); struct landlock_ruleset_attr *const ruleset_attr = (void *)buf; + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + ASSERT_NE(NULL, buf); /* Checks copy_from_user(). */ @@ -75,6 +83,10 @@ TEST(abi_version) const struct landlock_ruleset_attr ruleset_attr = { .handled_access_fs = LANDLOCK_ACCESS_FS_READ_FILE, }; + + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + ASSERT_NE(0, landlock_create_ruleset(NULL, 0, LANDLOCK_CREATE_RULESET_VERSION)); @@ -107,6 +119,9 @@ TEST(create_ruleset_checks_ordering) .handled_access_fs = LANDLOCK_ACCESS_FS_READ_FILE, }; + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + /* Checks priority for invalid flags. */ ASSERT_EQ(-1, landlock_create_ruleset(NULL, 0, invalid_flag)); ASSERT_EQ(EINVAL, errno); @@ -153,6 +168,9 @@ TEST(add_rule_checks_ordering) const int ruleset_fd = landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + ASSERT_LE(0, ruleset_fd); /* Checks invalid flags. */ @@ -200,6 +218,9 @@ TEST(restrict_self_checks_ordering) const int ruleset_fd = landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + ASSERT_LE(0, ruleset_fd); path_beneath_attr.parent_fd = open("/tmp", O_PATH | O_NOFOLLOW | O_DIRECTORY | O_CLOEXEC); @@ -240,6 +261,9 @@ TEST(ruleset_fd_io) int ruleset_fd; char buf; + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + drop_caps(_metadata); ruleset_fd = landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); @@ -267,6 +291,9 @@ TEST(ruleset_fd_transfer) pid_t child; int status; + if (!has_syscall()) + SKIP(return, "landlock syscall not available"); + drop_caps(_metadata); /* Creates a test ruleset with a simple rule. */