From patchwork Fri Dec 1 09:46:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13475579 X-Patchwork-Delegate: paul@paul-moore.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="WJ06Gg5Y" Received: from mail-pf1-x435.google.com (mail-pf1-x435.google.com [IPv6:2607:f8b0:4864:20::435]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F40D310F9; Fri, 1 Dec 2023 01:47:12 -0800 (PST) Received: by mail-pf1-x435.google.com with SMTP id d2e1a72fcca58-6cd97c135e8so1753573b3a.0; Fri, 01 Dec 2023 01:47:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1701424032; x=1702028832; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Hrd8Q/aZ94cCzu/B8oHzIUPKN1cXCmsoH2G1FVF6YII=; b=WJ06Gg5Y2l0Kve01pUObWIYRfzTPMdp0PZNSOMDGHrWbopIJpkaoyJbGoHGI1vqxhr NsRC4eE8mV4Yyy1+ruwfc5mTiI3hu1s/XzDXNE1GjHKnB5T3k7K+BjmWzz1r/UvQUbqq VoMp0P/AaOEB9+D8/81Gp5PqQvAknnqvz/4f8ubAeZ9D6I/PVtgR0DQeFKign+pUoryQ WsLWl1tPt7UAyxb7w2V+jNWROQt18MStBUCvbzE/naGvBjyNyFTEKbMSnLZMbuWA5FHq /CU37492EsQi9UKUz6Id5AF+wZpTnz6cb/V447UuUdmz4KY6XByRq0Oow7viuGfss5jh 0+tA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1701424032; x=1702028832; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Hrd8Q/aZ94cCzu/B8oHzIUPKN1cXCmsoH2G1FVF6YII=; b=M5JSXQGW9rae2V2Sp3ukwlQ0AB6CmTOPjZ/ng2fcHQC1WNjn7n/fjRhGyDCXLr1bs2 zB/dBPtXbhJp1uDYXQNX1Sr8RGSY+P4BzO7ApniYn3XTtqo8naSHLOAKj60JDk9zrdk7 dN9X90vvh6+l/UdiH3t4A1tC/HeHJ+uWtib5neg5+fuslJoJMGv7ZIR9E0Qp+xQGZq8v wbL9RfqiIJ6yhaPjHGrEMO5dDhP8XChqAjCfB8pbJLYQjAlICooweNIKkoFl3UDpd/cQ A47hqAosdGhriDJLAL9dK+nIo+/m7HBPIo45kzgqi2LG3ulVno9ta90l/PDLnYsWoy21 A2Lg== X-Gm-Message-State: AOJu0YxDs7nARNnlXLUgOZMHg3JGjcB0eHdmxD/WuBcfMG0mhp69nSfN MUcoyhEZBcpZwht/a4xDAfI= X-Google-Smtp-Source: AGHT+IGTfBMOdaKabUHzgD6/ex7gttFCAVl5dyu04ZCxUj3YMK/ifw1iGQwqNjXNRb2rj7NPqQSuqQ== X-Received: by 2002:a05:6a21:6215:b0:16c:b5ce:50f with SMTP id wm21-20020a056a21621500b0016cb5ce050fmr19689003pzb.32.1701424032510; Fri, 01 Dec 2023 01:47:12 -0800 (PST) Received: from vultr.guest ([149.28.194.201]) by smtp.gmail.com with ESMTPSA id e6-20020a170902b78600b001bdd7579b5dsm2875534pls.240.2023.12.01.01.47.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 01 Dec 2023 01:47:12 -0800 (PST) From: Yafang Shao To: akpm@linux-foundation.org, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, omosnace@redhat.com, mhocko@suse.com, ying.huang@intel.com Cc: linux-mm@kvack.org, linux-security-module@vger.kernel.org, bpf@vger.kernel.org, ligang.bdlg@bytedance.com, Yafang Shao Subject: [PATCH v3 5/7] security: selinux: Implement set_mempolicy hook Date: Fri, 1 Dec 2023 09:46:34 +0000 Message-Id: <20231201094636.19770-6-laoar.shao@gmail.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231201094636.19770-1-laoar.shao@gmail.com> References: <20231201094636.19770-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: linux-security-module@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a SELinux access control for the newly introduced set_mempolicy lsm hook. A new permission "setmempolicy" is defined under the "process" class for it. Signed-off-by: Yafang Shao --- security/selinux/hooks.c | 8 ++++++++ security/selinux/include/classmap.h | 2 +- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index feda711c6b7b..1528d4dcfa03 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -4238,6 +4238,13 @@ static int selinux_userns_create(const struct cred *cred) USER_NAMESPACE__CREATE, NULL); } +static int selinux_set_mempolicy(unsigned long mode, unsigned short mode_flags, + nodemask_t *nmask, unsigned int flags) +{ + return avc_has_perm(current_sid(), task_sid_obj(current), SECCLASS_PROCESS, + PROCESS__SETMEMPOLICY, NULL); +} + /* Returns error only if unable to parse addresses */ static int selinux_parse_skb_ipv4(struct sk_buff *skb, struct common_audit_data *ad, u8 *proto) @@ -7072,6 +7079,7 @@ static struct security_hook_list selinux_hooks[] __ro_after_init = { LSM_HOOK_INIT(task_kill, selinux_task_kill), LSM_HOOK_INIT(task_to_inode, selinux_task_to_inode), LSM_HOOK_INIT(userns_create, selinux_userns_create), + LSM_HOOK_INIT(set_mempolicy, selinux_set_mempolicy), LSM_HOOK_INIT(ipc_permission, selinux_ipc_permission), LSM_HOOK_INIT(ipc_getsecid, selinux_ipc_getsecid), diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h index a3c380775d41..c280d92a409f 100644 --- a/security/selinux/include/classmap.h +++ b/security/selinux/include/classmap.h @@ -51,7 +51,7 @@ const struct security_class_mapping secclass_map[] = { "getattr", "setexec", "setfscreate", "noatsecure", "siginh", "setrlimit", "rlimitinh", "dyntransition", "setcurrent", "execmem", "execstack", "execheap", "setkeycreate", - "setsockcreate", "getrlimit", NULL } }, + "setsockcreate", "getrlimit", "setmempolicy", NULL } }, { "process2", { "nnp_transition", "nosuid_transition", NULL } }, { "system",