From patchwork Fri Oct 11 18:44:20 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= X-Patchwork-Id: 13832929 Received: from smtp-190b.mail.infomaniak.ch (smtp-190b.mail.infomaniak.ch [185.125.25.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 833AD1D0486 for ; Fri, 11 Oct 2024 18:44:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.125.25.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728672292; cv=none; b=iAqs3Ym9lzAqSUebegbSjZSZqN1bRsCMef9F0eDrZXzfIL4NSEqWiaEzcgNjDgUyfNb/nIXUWxU47u+Vulxb06pQcwEijIlJWF6vzlloiRnRZ1GcFfibtHBZV97awcmWrRl2xYiMtoOOIu6tKxBhvYcLJmRvX2OmTfVwtzWunZk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728672292; c=relaxed/simple; bh=O1EEjSNCMJkeVz1DE2JEWk7oUV26bTjK3aVQCreFQa0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=fis+SLxc2/1QAwe+5En4Sh6YuyRZjdXnP1IsRr4kb3o75coUE3CSvFAPdN4Jf3kVschH2oPd8lhgTMumopDvl7Mi2OmzXoTAZDEP0NKJ6nrF12dwpVZrt6ev2+zl8k7Xh/hI2p5LI0ftzq9VDterxQY2VVk1IURy9I1Kbox0xhY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net; spf=pass smtp.mailfrom=digikod.net; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b=gHUcQTIS; arc=none smtp.client-ip=185.125.25.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=digikod.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=digikod.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=digikod.net header.i=@digikod.net header.b="gHUcQTIS" Received: from smtp-4-0001.mail.infomaniak.ch (smtp-4-0001.mail.infomaniak.ch [10.7.10.108]) by smtp-4-3000.mail.infomaniak.ch (Postfix) with ESMTPS id 4XQFsl18fHzJ3r; Fri, 11 Oct 2024 20:44:43 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=digikod.net; s=20191114; t=1728672283; bh=JarsyHP2gi90H4buKba+juANmtIwTUFPLAgfgya4hP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gHUcQTISbwF0nDJ9KG/YqeAl24uTnTv2K5R+1G61lpif2zdOLcD+oapwzxrbStlP8 CUT6Z++LGGI8Sve/tWh1P+W5JtuW3/ea0OTAyDBzUuAakWYZE2yYmWebsiGThKojdo 5LvDOntVfK0nxEMM5zgxebQJVXfw+Eb5rRqOV+so= Received: from unknown by smtp-4-0001.mail.infomaniak.ch (Postfix) with ESMTPA id 4XQFsj2XHXz2gn; Fri, 11 Oct 2024 20:44:41 +0200 (CEST) From: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= To: Al Viro , Christian Brauner , Kees Cook , Linus Torvalds , Paul Moore , Serge Hallyn , Theodore Ts'o Cc: =?utf-8?q?Micka=C3=ABl_Sala=C3=BCn?= , Adhemerval Zanella Netto , Alejandro Colomar , Aleksa Sarai , Andrew Morton , Andy Lutomirski , Arnd Bergmann , Casey Schaufler , Christian Heimes , Dmitry Vyukov , Elliott Hughes , Eric Biggers , Eric Chiang , Fan Wu , Florian Weimer , Geert Uytterhoeven , James Morris , Jan Kara , Jann Horn , Jeff Xu , Jonathan Corbet , Jordan R Abrahams , Lakshmi Ramasubramanian , Luca Boccassi , Luis Chamberlain , "Madhavan T . Venkataraman" , Matt Bobrowski , Matthew Garrett , Matthew Wilcox , Miklos Szeredi , Mimi Zohar , Nicolas Bouchinet , Scott Shell , Shuah Khan , Stephen Rothwell , Steve Dower , Steve Grubb , Thibaut Sautereau , Vincent Strubel , Xiaoming Ni , Yin Fengwei , kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, =?utf-8?q?G=C3=BCnther_Noack?= Subject: [PATCH v20 4/6] selftests/landlock: Add tests for execveat + AT_CHECK Date: Fri, 11 Oct 2024 20:44:20 +0200 Message-ID: <20241011184422.977903-5-mic@digikod.net> In-Reply-To: <20241011184422.977903-1-mic@digikod.net> References: <20241011184422.977903-1-mic@digikod.net> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Infomaniak-Routing: alpha Extend layout1.execute with the new AT_CHECK flag. The semantic with AT_CHECK is the same as with a simple execve(2), LANDLOCK_ACCESS_FS_EXECUTE is enforced the same way. Cc: Günther Noack Cc: Kees Cook Cc: Paul Moore Signed-off-by: Mickaël Salaün Link: https://lore.kernel.org/r/20241011184422.977903-5-mic@digikod.net --- tools/testing/selftests/landlock/fs_test.c | 26 ++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/tools/testing/selftests/landlock/fs_test.c b/tools/testing/selftests/landlock/fs_test.c index 6788762188fe..413be4fea21e 100644 --- a/tools/testing/selftests/landlock/fs_test.c +++ b/tools/testing/selftests/landlock/fs_test.c @@ -37,6 +37,10 @@ #include #include +/* Defines AT_CHECK without type conflicts. */ +#define _ASM_GENERIC_FCNTL_H +#include + #include "common.h" #ifndef renameat2 @@ -2008,6 +2012,21 @@ static void test_execute(struct __test_metadata *const _metadata, const int err, }; } +static void test_check_exec(struct __test_metadata *const _metadata, + const int err, const char *const path) +{ + int ret; + char *const argv[] = { (char *)path, NULL }; + + ret = execveat(AT_FDCWD, path, argv, NULL, AT_EMPTY_PATH | AT_CHECK); + if (err) { + EXPECT_EQ(-1, ret); + EXPECT_EQ(errno, err); + } else { + EXPECT_EQ(0, ret); + } +} + TEST_F_FORK(layout1, execute) { const struct rule rules[] = { @@ -2025,20 +2044,27 @@ TEST_F_FORK(layout1, execute) copy_binary(_metadata, file1_s1d2); copy_binary(_metadata, file1_s1d3); + /* Checks before file1_s1d1 being denied. */ + test_execute(_metadata, 0, file1_s1d1); + test_check_exec(_metadata, 0, file1_s1d1); + enforce_ruleset(_metadata, ruleset_fd); ASSERT_EQ(0, close(ruleset_fd)); ASSERT_EQ(0, test_open(dir_s1d1, O_RDONLY)); ASSERT_EQ(0, test_open(file1_s1d1, O_RDONLY)); test_execute(_metadata, EACCES, file1_s1d1); + test_check_exec(_metadata, EACCES, file1_s1d1); ASSERT_EQ(0, test_open(dir_s1d2, O_RDONLY)); ASSERT_EQ(0, test_open(file1_s1d2, O_RDONLY)); test_execute(_metadata, 0, file1_s1d2); + test_check_exec(_metadata, 0, file1_s1d2); ASSERT_EQ(0, test_open(dir_s1d3, O_RDONLY)); ASSERT_EQ(0, test_open(file1_s1d3, O_RDONLY)); test_execute(_metadata, 0, file1_s1d3); + test_check_exec(_metadata, 0, file1_s1d3); } TEST_F_FORK(layout1, link)