From patchwork Wed Mar 9 13:44:56 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: 12775114 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 32F86C4321E for ; Wed, 9 Mar 2022 13:46:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233223AbiCINrB (ORCPT ); Wed, 9 Mar 2022 08:47:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43032 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232881AbiCINqj (ORCPT ); Wed, 9 Mar 2022 08:46:39 -0500 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E01B417C400; Wed, 9 Mar 2022 05:45:26 -0800 (PST) Received: from fraeml704-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KDD1k3PFDz6H7L5; Wed, 9 Mar 2022 21:43:54 +0800 (CST) Received: from mscphispre00059.huawei.com (10.123.71.64) by fraeml704-chm.china.huawei.com (10.206.15.53) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2308.21; Wed, 9 Mar 2022 14:45:24 +0100 From: Konstantin Meskhidze To: CC: , , , , , , Subject: [RFC PATCH v4 12/15] seltest/landlock: connect() with AF_UNSPEC tests Date: Wed, 9 Mar 2022 21:44:56 +0800 Message-ID: <20220309134459.6448-13-konstantin.meskhidze@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220309134459.6448-1-konstantin.meskhidze@huawei.com> References: <20220309134459.6448-1-konstantin.meskhidze@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.123.71.64] X-ClientProxiedBy: mscpeml500001.china.huawei.com (7.188.26.142) To fraeml704-chm.china.huawei.com (10.206.15.53) X-CFilter-Loop: Reflected Precedence: bulk List-ID: Adds two selftests for connect() action with AF_UNSPEC family flag. The one is with no landlock restrictions allows to disconnect already conneted socket with connect(..., AF_UNSPEC, ...): - connect_afunspec_no_restictions; The second one refuses landlocked process to disconnect already connected socket: - connect_afunspec_with_restictions; Signed-off-by: Konstantin Meskhidze --- Changes since v3: * Add connect_afunspec_no_restictions test. * Add connect_afunspec_with_restictions test. --- .../testing/selftests/landlock/network_test.c | 94 +++++++++++++++++++ 1 file changed, 94 insertions(+) -- 2.25.1 diff --git a/tools/testing/selftests/landlock/network_test.c b/tools/testing/selftests/landlock/network_test.c index 20f2d94d6d85..6fce31cad368 100644 --- a/tools/testing/selftests/landlock/network_test.c +++ b/tools/testing/selftests/landlock/network_test.c @@ -312,4 +312,98 @@ TEST_F_FORK(socket, connect_with_restrictions) { ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status)); } +TEST_F_FORK(socket, connect_afunspec_no_restictions) { + + int sockfd; + pid_t child; + int status; + + /* Creates a server socket 1 */ + sockfd = create_socket(_metadata); + ASSERT_LE(0, sockfd); + + /* Binds the socket 1 to address with port[0] */ + ASSERT_EQ(0, bind(sockfd, (struct sockaddr *)&addr[0], sizeof(addr[0]))); + + /* Makes connection to socket with port[0] */ + ASSERT_EQ(0, connect(sockfd, (struct sockaddr *)&addr[0], + sizeof(addr[0]))); + + child = fork(); + ASSERT_LE(0, child); + if (child == 0) { + struct sockaddr addr_unspec = {.sa_family = AF_UNSPEC}; + + /* Child tries to disconnect already connected socket */ + ASSERT_EQ(0, connect(sockfd, (struct sockaddr *)&addr_unspec, + sizeof(addr_unspec))); + _exit(_metadata->passed ? EXIT_SUCCESS : EXIT_FAILURE); + return; + } + /* Closes listening socket 1 for the parent*/ + ASSERT_EQ(0, close(sockfd)); + + ASSERT_EQ(child, waitpid(child, &status, 0)); + ASSERT_EQ(1, WIFEXITED(status)); + ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status)); +} + +TEST_F_FORK(socket, connect_afunspec_with_restictions) { + + int sockfd; + pid_t child; + int status; + + struct landlock_ruleset_attr ruleset_attr = { + .handled_access_net = LANDLOCK_ACCESS_NET_BIND_TCP | + LANDLOCK_ACCESS_NET_CONNECT_TCP, + }; + struct landlock_net_service_attr net_service_1 = { + .allowed_access = LANDLOCK_ACCESS_NET_BIND_TCP | + LANDLOCK_ACCESS_NET_CONNECT_TCP, + + .port = port[0], + }; + + const int ruleset_fd = landlock_create_ruleset(&ruleset_attr, + sizeof(ruleset_attr), 0); + ASSERT_LE(0, ruleset_fd); + + /* Allows connect and bind operations to the port[0] socket */ + ASSERT_EQ(0, landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_SERVICE, + &net_service_1, 0)); + + /* Enforces the ruleset. */ + enforce_ruleset(_metadata, ruleset_fd); + + /* Creates a server socket 1 */ + sockfd = create_socket(_metadata); + ASSERT_LE(0, sockfd); + + /* Binds the socket 1 to address with port[0] */ + ASSERT_EQ(0, bind(sockfd, (struct sockaddr *)&addr[0], sizeof(addr[0]))); + + /* Makes connection to socket with port[0] */ + ASSERT_EQ(0, connect(sockfd, (struct sockaddr *)&addr[0], + sizeof(addr[0]))); + + child = fork(); + ASSERT_LE(0, child); + if (child == 0) { + struct sockaddr addr_unspec = {.sa_family = AF_UNSPEC}; + + /* Child tries to disconnect already connected socket */ + ASSERT_EQ(-1, connect(sockfd, (struct sockaddr *)&addr_unspec, + sizeof(addr_unspec))); + ASSERT_EQ(EACCES, errno); + _exit(_metadata->passed ? EXIT_SUCCESS : EXIT_FAILURE); + return; + } + /* Closes listening socket 1 for the parent*/ + ASSERT_EQ(0, close(sockfd)); + + ASSERT_EQ(child, waitpid(child, &status, 0)); + ASSERT_EQ(1, WIFEXITED(status)); + ASSERT_EQ(EXIT_SUCCESS, WEXITSTATUS(status)); +} TEST_HARNESS_MAIN