From patchwork Mon Aug 29 17:03:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Konstantin Meskhidze (A)" X-Patchwork-Id: 12958252 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 800C1C6FA83 for ; Mon, 29 Aug 2022 17:06:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231411AbiH2RGW (ORCPT ); Mon, 29 Aug 2022 13:06:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231276AbiH2RFZ (ORCPT ); Mon, 29 Aug 2022 13:05:25 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A81F9CCEE; Mon, 29 Aug 2022 10:04:34 -0700 (PDT) Received: from fraeml703-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4MGcGn3tHKz67wrR; Tue, 30 Aug 2022 01:04:01 +0800 (CST) Received: from lhrpeml500004.china.huawei.com (7.191.163.9) by fraeml703-chm.china.huawei.com (10.206.15.52) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2375.31; Mon, 29 Aug 2022 19:04:32 +0200 Received: from mscphis00759.huawei.com (10.123.66.134) by lhrpeml500004.china.huawei.com (7.191.163.9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Mon, 29 Aug 2022 18:04:31 +0100 From: Konstantin Meskhidze To: CC: , , , , , , , Subject: [PATCH v7 15/18] seltests/landlock: add ruleset expanding test Date: Tue, 30 Aug 2022 01:03:58 +0800 Message-ID: <20220829170401.834298-16-konstantin.meskhidze@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220829170401.834298-1-konstantin.meskhidze@huawei.com> References: <20220829170401.834298-1-konstantin.meskhidze@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.66.134] X-ClientProxiedBy: mscpeml100002.china.huawei.com (7.188.26.75) To lhrpeml500004.china.huawei.com (7.191.163.9) X-CFilter-Loop: Reflected Precedence: bulk List-ID: This patch adds expanding rulesets in which rules are gradually added one by one, restricting sockets' connections. Signed-off-by: Konstantin Meskhidze --- Changes since v6: * None. Changes since v5: * Formats code with clang-format-14. Changes since v4: * Refactors code with self->port, self->addr4 variables. Changes since v3: * Adds ruleset_expanding test. --- tools/testing/selftests/landlock/net_test.c | 166 ++++++++++++++++++++ 1 file changed, 166 insertions(+) -- 2.25.1 diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c index b3b38745f4eb..a93224d1521b 100644 --- a/tools/testing/selftests/landlock/net_test.c +++ b/tools/testing/selftests/landlock/net_test.c @@ -553,4 +553,170 @@ TEST_F(socket, ruleset_overlap) ASSERT_EQ(0, close(sockfd)); } +TEST_F(socket, ruleset_expanding) +{ + int sockfd_1, sockfd_2; + int one = 1; + + struct landlock_ruleset_attr ruleset_attr_1 = { + .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP, + }; + struct landlock_net_service_attr net_service_1 = { + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, + + .port = self->port[0], + }; + + const int ruleset_fd_1 = landlock_create_ruleset( + &ruleset_attr_1, sizeof(ruleset_attr_1), 0); + ASSERT_LE(0, ruleset_fd_1); + + /* Adds rule to port[0] socket. */ + ASSERT_EQ(0, landlock_add_rule(ruleset_fd_1, LANDLOCK_RULE_NET_SERVICE, + &net_service_1, 0)); + + /* Enforces the ruleset. */ + enforce_ruleset(_metadata, ruleset_fd_1); + ASSERT_EQ(0, close(ruleset_fd_1)); + + /* Creates a socket 1. */ + sockfd_1 = create_socket_variant(variant, SOCK_STREAM); + ASSERT_LE(0, sockfd_1); + /* Allows to reuse of local address. */ + ASSERT_EQ(0, setsockopt(sockfd_1, SOL_SOCKET, SO_REUSEADDR, &one, + sizeof(one))); + + /* Binds the socket 1 to address with port[0]. */ + ASSERT_EQ(0, bind_variant(variant, sockfd_1, self, 0)); + + /* Makes connection to socket 1 with port[0]. */ + ASSERT_EQ(0, connect_variant(variant, sockfd_1, self, 0)); + + /* Closes socket 1. */ + ASSERT_EQ(0, close(sockfd_1)); + + /* Creates a socket 2. */ + sockfd_2 = create_socket_variant(variant, SOCK_STREAM); + ASSERT_LE(0, sockfd_2); + /* Allows to reuse of local address. */ + ASSERT_EQ(0, setsockopt(sockfd_2, SOL_SOCKET, SO_REUSEADDR, &one, + sizeof(one))); + + /* + * Forbids to bind the socket 2 to address with port[1], + * cause there is no rule with bind() access for port[1]. + */ + ASSERT_EQ(-1, bind_variant(variant, sockfd_2, self, 1)); + ASSERT_EQ(EACCES, errno); + + /* Expands network mask. */ + struct landlock_ruleset_attr ruleset_attr_2 = { + .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | + LANDLOCK_ACCESS_NET_CONNECT_TCP, + }; + + /* Adds connect() access to port[0]. */ + struct landlock_net_service_attr net_service_2 = { + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | + LANDLOCK_ACCESS_NET_CONNECT_TCP, + + .port = self->port[0], + }; + /* Adds bind() access to port[1]. */ + struct landlock_net_service_attr net_service_3 = { + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, + + .port = self->port[1], + }; + + const int ruleset_fd_2 = landlock_create_ruleset( + &ruleset_attr_2, sizeof(ruleset_attr_2), 0); + ASSERT_LE(0, ruleset_fd_2); + + /* Adds rule to port[0] socket. */ + ASSERT_EQ(0, landlock_add_rule(ruleset_fd_2, LANDLOCK_RULE_NET_SERVICE, + &net_service_2, 0)); + /* Adds rule to port[1] socket. */ + ASSERT_EQ(0, landlock_add_rule(ruleset_fd_2, LANDLOCK_RULE_NET_SERVICE, + &net_service_3, 0)); + + /* Enforces the ruleset. */ + enforce_ruleset(_metadata, ruleset_fd_2); + ASSERT_EQ(0, close(ruleset_fd_2)); + + /* Creates a socket 1. */ + sockfd_1 = create_socket_variant(variant, SOCK_STREAM); + ASSERT_LE(0, sockfd_1); + /* Allows to reuse of local address. */ + ASSERT_EQ(0, setsockopt(sockfd_1, SOL_SOCKET, SO_REUSEADDR, &one, + sizeof(one))); + + /* Binds the socket 1 to address with port[0]. */ + ASSERT_EQ(0, bind_variant(variant, sockfd_1, self, 0)); + + /* Makes connection to socket 1 with port[0]. */ + ASSERT_EQ(0, connect_variant(variant, sockfd_1, self, 0)); + + /* Closes socket 1. */ + ASSERT_EQ(0, close(sockfd_1)); + + /* Creates a socket 2. */ + sockfd_2 = create_socket_variant(variant, SOCK_STREAM); + ASSERT_LE(0, sockfd_2); + /* Allows to reuse of local address. */ + ASSERT_EQ(0, setsockopt(sockfd_2, SOL_SOCKET, SO_REUSEADDR, &one, + sizeof(one))); + + /* + * Forbids to bind the socket 2 to address with port[1], + * cause just one layer has bind() access rule. + */ + ASSERT_EQ(-1, bind_variant(variant, sockfd_1, self, 1)); + ASSERT_EQ(EACCES, errno); + + /* Expands network mask. */ + struct landlock_ruleset_attr ruleset_attr_3 = { + .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | + LANDLOCK_ACCESS_NET_CONNECT_TCP, + }; + + /* Restricts connect() access to port[0]. */ + struct landlock_net_service_attr net_service_4 = { + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP, + + .port = self->port[0], + }; + + const int ruleset_fd_3 = landlock_create_ruleset( + &ruleset_attr_3, sizeof(ruleset_attr_3), 0); + ASSERT_LE(0, ruleset_fd_3); + + /* Adds rule to port[0] socket. */ + ASSERT_EQ(0, landlock_add_rule(ruleset_fd_3, LANDLOCK_RULE_NET_SERVICE, + &net_service_4, 0)); + + /* Enforces the ruleset. */ + enforce_ruleset(_metadata, ruleset_fd_3); + ASSERT_EQ(0, close(ruleset_fd_3)); + + /* Creates a socket 1. */ + sockfd_1 = create_socket_variant(variant, SOCK_STREAM); + ASSERT_LE(0, sockfd_1); + /* Allows to reuse of local address. */ + ASSERT_EQ(0, setsockopt(sockfd_1, SOL_SOCKET, SO_REUSEADDR, &one, + sizeof(one))); + + /* Binds the socket 1 to address with port[0]. */ + ASSERT_EQ(0, bind_variant(variant, sockfd_1, self, 0)); + + /* + * Forbids to connect the socket 1 to address with port[0], + * cause just one layer has connect() access rule. + */ + ASSERT_EQ(-1, connect_variant(variant, sockfd_1, self, 0)); + ASSERT_EQ(EACCES, errno); + + /* Closes socket 1. */ + ASSERT_EQ(0, close(sockfd_1)); +} TEST_HARNESS_MAIN