From patchwork Fri Dec 8 09:06:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13485041 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="KtlA6IcU" Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F18C2171C; Fri, 8 Dec 2023 01:06:47 -0800 (PST) Received: by mail-pl1-x62c.google.com with SMTP id d9443c01a7336-1d1e1edb10bso16931185ad.1; Fri, 08 Dec 2023 01:06:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1702026407; x=1702631207; 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=6NLQupAZumzbZoKpNAG12sWAtAVUuthZdQhUM0QKlyo=; b=KtlA6IcUmzvgdy5ncakz9CcbDOjJ4sdpwTW4jleIsGbMjCZc+UMiClM4e8ffvQF5Dy imItZQg9jpMDglEaNc2n/Gni4OfqpcoYG3F/uDw7ODfgo63GCtURiD1Qgg3s5OERDa89 BRPnjdkBw/wwrnbsYrbr2XAXetO32mPLrJcV7n8lukiO2ivWjaU31+++P4RaxhsxDem4 /YAMreuvVEyIE882fegqaewhMftkillwtqdDNZaUnL5L1GAGlI5MXbaOcgwn3Ko0bQSz pmWFsOK+8qMK0RIrVYIeyN9TlUbDsjMQ0491ytPKHLRpQPZdiSMnsFs/m4nOXSt1azY7 bQfw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702026407; x=1702631207; 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=6NLQupAZumzbZoKpNAG12sWAtAVUuthZdQhUM0QKlyo=; b=akWobL6NxqWVBSH1aM+DeIin8bJbx6FYQw8Jfu+o6iLITjGd4VMInSUQqQJ4lnLuo8 hKMON58Jx2b0rrWu8GyGysTxItt1khv7IcectLnqXDGZRXDFZtb3S3RUuLRSX3zlKfZt 9LFxGX2PjWXjkSH4LctFOK6lOHi/F7oZ2GmywhzsHuP9Df+nhH2rMbSsQNGTDi8dbTxS td6vUkfkcM8UyvBJfHJn01r5CuziDdc3g/mBgEbytI5tSouMkkpuinwegDUwuxPgsjbD 0MVCPEwH1OPf1RRKF4S23w0B5Nu8dcKGgp09654fqGZqkL+XpGxQ03Brcu9YFjXk0vgP npHQ== X-Gm-Message-State: AOJu0YxHcb4+ER2XD/VaN4d1FTytaocTAX1HK+mYa8glEV7nItg7yehj KNqX20Ldoq1hGtA8doqQUDo= X-Google-Smtp-Source: AGHT+IFZVEkMU90veuH9AP4AV43iIfPMyna/tHibWLIRr/K+v5B3aBILYxNOBzTd1wYRXklDq0Kt2w== X-Received: by 2002:a17:903:41ce:b0:1d0:7c31:197e with SMTP id u14-20020a17090341ce00b001d07c31197emr4774284ple.57.1702026407392; Fri, 08 Dec 2023 01:06:47 -0800 (PST) Received: from vultr.guest ([2001:19f0:ac00:4055:5400:4ff:fead:3bd0]) by smtp.gmail.com with ESMTPSA id 21-20020a170902ee5500b001d057080022sm1188173plo.20.2023.12.08.01.06.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Dec 2023 01:06:46 -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 v4 4/5] security: selinux: Implement set_mempolicy hook Date: Fri, 8 Dec 2023 09:06:21 +0000 Message-Id: <20231208090622.4309-5-laoar.shao@gmail.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231208090622.4309-1-laoar.shao@gmail.com> References: <20231208090622.4309-1-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 feda711..1528d4d 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 int selinux_uring_cmd(struct io_uring_cmd *ioucmd) 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 a3c3807..c280d92 100644 --- a/security/selinux/include/classmap.h +++ b/security/selinux/include/classmap.h @@ -51,7 +51,7 @@ "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",