From patchwork Mon Apr 8 09:39:17 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikhail Ivanov X-Patchwork-Id: 13620896 Received: from szxga04-in.huawei.com (szxga04-in.huawei.com [45.249.212.190]) (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 979ED481A6; Mon, 8 Apr 2024 09:40:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.190 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712569209; cv=none; b=MBq6ceC+ebFhpMMDkRs+VAV1t1Q6KJftgN9+numQe9a253D1DqvjxY4Z+c8nxEyPRcEInPIa8E6nWc+8Kl8eWFU/H4499bX7EELwnpC3wyuWRvNj/90l5gfosuyOg3VKxMpjL26LbuU25AwZ4v93xx80CocbqOv/31gOogZeuus= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712569209; c=relaxed/simple; bh=YBUbh6HtUyMMTAq9uOto0mpD3Zh0eaTzvy58NwTSo6c=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=aiV/DWQ8XIiXjq13qF/Fz8OVo19PWzyHrSXNFMgikipuchNMitAz1NOv1yLkpR4X/Yqb5Y5cnXegJ0wbq8CHqmStA3IclVQ8C4tVT7RIpM617/s7G3xmGkiXBTHWqb3YGZzQgNCs+547H/VbVbzj0E/eas79JKz9eS/1LBEla44= 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=45.249.212.190 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 [172.19.88.163]) by szxga04-in.huawei.com (SkyGuard) with ESMTP id 4VCkWs5l4Pz29lMy; Mon, 8 Apr 2024 17:37:13 +0800 (CST) Received: from dggpemm500020.china.huawei.com (unknown [7.185.36.49]) by mail.maildlp.com (Postfix) with ESMTPS id E0AD718005F; Mon, 8 Apr 2024 17:40:03 +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 15.1.2507.35; Mon, 8 Apr 2024 17:40:01 +0800 From: Ivanov Mikhail To: CC: , , , , , , , Subject: [RFC PATCH v1 00/10] Socket type control for Landlock Date: Mon, 8 Apr 2024 17:39:17 +0800 Message-ID: <20240408093927.1759381-1-ivanov.mikhail1@huawei-partners.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: mscpeml100003.china.huawei.com (10.199.174.67) To dggpemm500020.china.huawei.com (7.185.36.49) Patchset implements new type of Landlock rule, that restricts actions for sockets of any protocol. Such restriction would be useful to ensure that a sandboxed process uses only necessary protocols. See [2] for more cases. The rules store information about the socket family(aka domain) and type. struct landlock_socket_attr { __u64 allowed_access; int domain; // see socket(2) int type; // see socket(2) } Patchset currently implements rule only for socket_create() method, but other necessary rules will also be impemented. [1] Code coverage(gcov) report with the launch of all the landlock selftests: * security/landlock: lines......: 94.7% (784 of 828 lines) functions..: 97.2% (105 of 108 functions) * security/landlock/socket.c: lines......: 100.0% (33 of 33 lines) functions..: 100.0% (5 of 5 functions) [1] https://lore.kernel.org/all/b8a2045a-e7e8-d141-7c01-bf47874c7930@digikod.net/ [2] https://lore.kernel.org/all/ZJvy2SViorgc+cZI@google.com/ Ivanov Mikhail (10): landlock: Support socket access-control landlock: Add hook on socket_create() selftests/landlock: Create 'create' test selftests/landlock: Create 'socket_access_rights' test selftests/landlock: Create 'rule_with_unknown_access' test selftests/landlock: Create 'rule_with_unhandled_access' test selftests/landlock: Create 'inval' test selftests/landlock: Create 'ruleset_overlap' test selftests/landlock: Create 'ruleset_with_unknown_access' test samples/landlock: Support socket protocol restrictions include/uapi/linux/landlock.h | 49 ++ samples/landlock/sandboxer.c | 149 +++++- security/landlock/Makefile | 2 +- security/landlock/limits.h | 5 + security/landlock/net.c | 2 +- security/landlock/ruleset.c | 35 +- security/landlock/ruleset.h | 44 +- security/landlock/setup.c | 2 + security/landlock/socket.c | 115 +++++ security/landlock/socket.h | 19 + security/landlock/syscalls.c | 55 ++- tools/testing/selftests/landlock/base_test.c | 2 +- .../testing/selftests/landlock/socket_test.c | 457 ++++++++++++++++++ 13 files changed, 910 insertions(+), 26 deletions(-) create mode 100644 security/landlock/socket.c create mode 100644 security/landlock/socket.h create mode 100644 tools/testing/selftests/landlock/socket_test.c