From patchwork Wed Sep 4 10:48:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Mikhail Ivanov X-Patchwork-Id: 13790482 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) (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 2CC7F635; Wed, 4 Sep 2024 10:48:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.255 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725446938; cv=none; b=fNmsp/95rjdRbDoe9Ildmj4Fv08PMzdiop1i9frl8VceFNGdgY4eI78zlKIDed83tZ+mU/0/Xo9JZjswLp/azgjy2xUOSdpUIPrTVAXcGRyRU+I9qtHl1yUQwJYK6MdXSngk1+OFwa7QTAdLcxMWn4sHVofPl858TH2gPr1MfJc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725446938; c=relaxed/simple; bh=tPvunVaZWlh8tfqE1t0F9FXoxdU7bk6AXubYP/7CZJw=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=kuXT+bgbGPyakc8PcrMMUgk0Doax892w9SBT0VTRgTeSFiKU4SCohKRtWGnpNtixpFHKbG5snftopPwNfLdpAqPNaxqO630KOLQqhCc21aI2G9go+sEkIWJ1zTbNYWZfCohMmlT0qivP/n0JuBidkkl7clqedL3grUiNDn72m1M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei-partners.com; spf=pass smtp.mailfrom=huawei-partners.com; arc=none smtp.client-ip=45.249.212.255 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei-partners.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei-partners.com Received: from mail.maildlp.com (unknown [172.19.162.254]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4WzK2h6TN5z13Kwk; Wed, 4 Sep 2024 18:47:56 +0800 (CST) Received: from kwepemj200016.china.huawei.com (unknown [7.202.194.28]) by mail.maildlp.com (Postfix) with ESMTPS id 49AF4180105; Wed, 4 Sep 2024 18:48:54 +0800 (CST) Received: from mscphis02103.huawei.com (10.123.65.215) by kwepemj200016.china.huawei.com (7.202.194.28) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Wed, 4 Sep 2024 18:48:52 +0800 From: Mikhail Ivanov To: CC: , , , , , , , Subject: [RFC PATCH v3 12/19] selftests/landlock: Test that kernel space sockets are not restricted Date: Wed, 4 Sep 2024 18:48:17 +0800 Message-ID: <20240904104824.1844082-13-ivanov.mikhail1@huawei-partners.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240904104824.1844082-1-ivanov.mikhail1@huawei-partners.com> References: <20240904104824.1844082-1-ivanov.mikhail1@huawei-partners.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: mscpeml500004.china.huawei.com (7.188.26.250) To kwepemj200016.china.huawei.com (7.202.194.28) Add test validating that Landlock provides restriction of user space sockets only. Signed-off-by: Mikhail Ivanov Reviewed-by: Günther Noack --- .../testing/selftests/landlock/socket_test.c | 39 ++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/landlock/socket_test.c b/tools/testing/selftests/landlock/socket_test.c index ff5ace711697..23698b8c2f4d 100644 --- a/tools/testing/selftests/landlock/socket_test.c +++ b/tools/testing/selftests/landlock/socket_test.c @@ -7,7 +7,7 @@ #define _GNU_SOURCE -#include +#include "landlock.h" #include #include #include @@ -628,4 +628,41 @@ TEST(unsupported_af_and_prot) EXPECT_EQ(ESOCKTNOSUPPORT, test_socket(AF_UNIX, SOCK_PACKET, 0)); } +TEST(kernel_socket) +{ + const struct landlock_ruleset_attr ruleset_attr = { + .handled_access_socket = LANDLOCK_ACCESS_SOCKET_CREATE, + }; + struct landlock_socket_attr smc_socket_create = { + .allowed_access = LANDLOCK_ACCESS_SOCKET_CREATE, + .family = AF_SMC, + .type = SOCK_STREAM, + }; + int ruleset_fd; + + /* + * Checks that SMC socket is created sucessfuly without + * landlock restrictions. + */ + ASSERT_EQ(0, test_socket(AF_SMC, SOCK_STREAM, 0)); + + ruleset_fd = + landlock_create_ruleset(&ruleset_attr, sizeof(ruleset_attr), 0); + ASSERT_LE(0, ruleset_fd); + + ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_SOCKET, + &smc_socket_create, 0)); + enforce_ruleset(_metadata, ruleset_fd); + ASSERT_EQ(0, close(ruleset_fd)); + + /* + * During the creation of an SMC socket, an internal service TCP socket + * is also created (Cf. smc_create_clcsk). + * + * Checks that Landlock does not restrict creation of the kernel space + * socket. + */ + EXPECT_EQ(0, test_socket(AF_SMC, SOCK_STREAM, 0)); +} + TEST_HARNESS_MAIN