From patchwork Wed Aug 14 03:01:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikhail Ivanov X-Patchwork-Id: 13762788 Received: from szxga06-in.huawei.com (szxga06-in.huawei.com [45.249.212.32]) (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 BECD61CAA2; Wed, 14 Aug 2024 03:02:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.32 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723604533; cv=none; b=Qqdpf+dKClUqToE1DVWuFVNovmbRypk2/rZtJPVOjecDHREUZGD9Hvs0uVf80dfJT5BaemnhaiF0z/3W1u1UazCzuGBaFpE3k6MAw/wLsrD6pyA8W2HWFEFjfh3ttfnAciRAU2lMyVJMSd1L3rim0QHp1Puyp23sFufHO+Rj7Ec= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723604533; c=relaxed/simple; bh=wtB0l5FobLp8sTKRHYLuJrJAFDakL8hq6JSqlFDJAMo=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Y5QhUIxmfAY+ngWSlM+pGs2h85kPfrg+mGOsFliuT6ZE0iHDVl9ZT60YAPiKPnnIRTHQuevWeGpyt9a9zmEwQ/t155EzOKA/7dpKX3Mr9hpsdkHqGRbTO8x92QW4hAFL8wPia/lHxp29VXh5r237fSkiyYwVGqC8N880lPqxx74= 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=45.249.212.32 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 [172.19.88.214]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4WkCfp3tVZz1xtxV; Wed, 14 Aug 2024 11:00:18 +0800 (CST) Received: from dggpemm500020.china.huawei.com (unknown [7.185.36.49]) by mail.maildlp.com (Postfix) with ESMTPS id CB5C21A016C; Wed, 14 Aug 2024 11:02:09 +0800 (CST) Received: from mscphis02103.huawei.com (10.123.65.215) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Wed, 14 Aug 2024 11:02:08 +0800 From: Mikhail Ivanov To: CC: , , , , , , , Subject: [RFC PATCH v2 5/9] selftests/landlock: Test listen on connected socket Date: Wed, 14 Aug 2024 11:01:47 +0800 Message-ID: <20240814030151.2380280-6-ivanov.mikhail1@huawei-partners.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240814030151.2380280-1-ivanov.mikhail1@huawei-partners.com> References: <20240814030151.2380280-1-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 dggpemm500020.china.huawei.com (7.185.36.49) Test checks that listen(2) doesn't wrongfully return -EACCES instead of -EINVAL when trying to listen for an incorrect socket state. Signed-off-by: Mikhail Ivanov --- Changes since v1: * Uses 'protocol' fixture instead of 'ipv4_tcp'. * Minor fixes. --- tools/testing/selftests/landlock/net_test.c | 74 +++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/tools/testing/selftests/landlock/net_test.c b/tools/testing/selftests/landlock/net_test.c index b6fe9bde205f..551891b18b7a 100644 --- a/tools/testing/selftests/landlock/net_test.c +++ b/tools/testing/selftests/landlock/net_test.c @@ -926,6 +926,80 @@ TEST_F(protocol, connect_unspec) EXPECT_EQ(0, close(bind_fd)); } +TEST_F(protocol, listen_on_connected) +{ + int bind_fd, status; + pid_t child; + + if (variant->sandbox == TCP_SANDBOX) { + const struct landlock_ruleset_attr ruleset_attr = { + .handled_access_net = ACCESS_ALL, + }; + const struct landlock_net_port_attr tcp_not_restricted_p0 = { + .allowed_access = ACCESS_ALL, + .port = self->srv0.port, + }; + const struct landlock_net_port_attr tcp_denied_listen_p1 = { + .allowed_access = ACCESS_ALL & + ~LANDLOCK_ACCESS_NET_LISTEN_TCP, + .port = self->srv1.port, + }; + int ruleset_fd; + + ruleset_fd = landlock_create_ruleset(&ruleset_attr, + sizeof(ruleset_attr), 0); + ASSERT_LE(0, ruleset_fd); + + /* Allows all actions for the first port. */ + ASSERT_EQ(0, + landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, + &tcp_not_restricted_p0, 0)); + + /* Denies listening for the second port. */ + ASSERT_EQ(0, + landlock_add_rule(ruleset_fd, LANDLOCK_RULE_NET_PORT, + &tcp_denied_listen_p1, 0)); + + enforce_ruleset(_metadata, ruleset_fd); + EXPECT_EQ(0, close(ruleset_fd)); + } + + if (variant->prot.type != SOCK_STREAM) + SKIP(return, "listen(2) is supported only on stream sockets"); + + /* Initializes listening socket. */ + bind_fd = socket_variant(&self->srv0); + ASSERT_LE(0, bind_fd); + EXPECT_EQ(0, bind_variant(bind_fd, &self->srv0)); + EXPECT_EQ(0, listen_variant(bind_fd, backlog)); + + child = fork(); + ASSERT_LE(0, child); + if (child == 0) { + int connect_fd; + + /* Closes listening socket for the child. */ + EXPECT_EQ(0, close(bind_fd)); + + connect_fd = socket_variant(&self->srv1); + ASSERT_LE(0, connect_fd); + EXPECT_EQ(0, connect_variant(connect_fd, &self->srv0)); + + /* Tries to listen on connected socket. */ + EXPECT_EQ(-EINVAL, listen_variant(connect_fd, backlog)); + + EXPECT_EQ(0, close(connect_fd)); + _exit(_metadata->exit_code); + return; + } + + EXPECT_EQ(child, waitpid(child, &status, 0)); + EXPECT_EQ(1, WIFEXITED(status)); + EXPECT_EQ(EXIT_SUCCESS, WEXITSTATUS(status)); + + EXPECT_EQ(0, close(bind_fd)); +} + FIXTURE(ipv4) { struct service_fixture srv0, srv1;