From patchwork Sun Nov 12 07:34:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yafang Shao X-Patchwork-Id: 13453304 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (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 A4E76613B for ; Sun, 12 Nov 2023 07:35:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="B5h7uHtS" Received: from mail-ot1-x32e.google.com (mail-ot1-x32e.google.com [IPv6:2607:f8b0:4864:20::32e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D16C2D7C; Sat, 11 Nov 2023 23:35:08 -0800 (PST) Received: by mail-ot1-x32e.google.com with SMTP id 46e09a7af769-6d30d9f4549so2142101a34.0; Sat, 11 Nov 2023 23:35:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1699774507; x=1700379307; 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=ZM+z4PYBGo1mm2pkGctatP2LhDD0LXLs8IszYhVAzsM=; b=B5h7uHtSA9M/kKuywos28JAXq5L80oz71JP+sxo5ad5TX1NM5utneDp+bkuJTYJZ2a aDZ4LHfLwnYFy/4mW9wWy9MX3tMp60qAds0gNDeRos5zFW86TjsbgFxThmnaZcPZ8LpY JeGJU2jf3+UzKyqR1vmnCipT4YWneagOGL9+mliGza/EshYYDYerQTy5VbOPf68yk9wJ iiuPW4AYCOhASiBf2VMpreUUBVoucHlq2jGapnkkmUHVeceezw5F1p1fQdoHjrt3Qdao wB0dAKvvxCH5Gcyuc/t0DqWHpj3Wj4j8hg6lPnSSvPc44R7w03r11LKIu/qoltASsNgs 54/Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1699774507; x=1700379307; 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=ZM+z4PYBGo1mm2pkGctatP2LhDD0LXLs8IszYhVAzsM=; b=Ibkj6/QdeRBHxM0BuTfZcdSmwkX6UBuytNoRx0KKApmC+W/LxoUHqcmNTaol+o/6FD VvhzDBlk46d5famwWAf4kgDxEFwCc59VVQTynWA0OpriZ9y2003OpgMtguH50vwUgXP5 3846IF96cNk+ZkJ8MYO3am9+T7UZ1AaU5jppywuIfT+PdrzGVjALUry48hz8GVoEOMRd vfJ/Qu1Xo3GN+x89xyL1rbUzahRrasdj21e+Zn6GfI+qeDTqyAChCECLzgafEnzWEJsx TqwZpw3KMm1lHlgdnipVf3WByb/ntonIdEqTaxUaLzIixKIjCt8JaCXeoZW5QpSvmUGR fDWg== X-Gm-Message-State: AOJu0YwtTXF8KzdMWLgpTraY7ZCBW3qX5lfqQDfJGfFJT2LoEWXtshvh 4FnHinyFWnjIj9lBIqUqycwngeezzZbYTmFzEHs= X-Google-Smtp-Source: AGHT+IEjrQA3GC8YAYZ605VpsU18IZ6mMsKqu+CCJxCxJoo10R6PPum6k2MxheaGhmm8FC2lWjmU5g== X-Received: by 2002:a05:6830:16ca:b0:6d3:e5c:768f with SMTP id l10-20020a05683016ca00b006d30e5c768fmr4341945otr.11.1699774507662; Sat, 11 Nov 2023 23:35:07 -0800 (PST) Received: from vultr.guest ([2001:19f0:ac00:49b3:5400:4ff:fea5:2304]) by smtp.gmail.com with ESMTPSA id 6-20020a170902c10600b001ca4c20003dsm2217394pli.69.2023.11.11.23.35.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Nov 2023 23:35:07 -0800 (PST) From: Yafang Shao To: akpm@linux-foundation.org, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com Cc: linux-mm@kvack.org, linux-security-module@vger.kernel.org, bpf@vger.kernel.org, ligang.bdlg@bytedance.com, mhocko@suse.com, Yafang Shao Subject: [RFC PATCH -mm 3/4] mm, security: Add lsm hook for set_mempolicy_home_node(2) Date: Sun, 12 Nov 2023 07:34:23 +0000 Message-Id: <20231112073424.4216-4-laoar.shao@gmail.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231112073424.4216-1-laoar.shao@gmail.com> References: <20231112073424.4216-1-laoar.shao@gmail.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-State: RFC In container environment, we don't want users to bind their memory to a specific numa node, while we want to unit control memory resource with kubelet. Therefore, add a new lsm hook for set_mempolicy_home_node(2), then we can enforce fine-grained control over memory policy adjustment by the tasks in a container. Signed-off-by: Yafang Shao --- include/linux/lsm_hook_defs.h | 2 ++ include/linux/security.h | 8 ++++++++ mm/mempolicy.c | 5 +++++ security/security.c | 7 +++++++ 4 files changed, 22 insertions(+) diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h index 725a03d..109883e 100644 --- a/include/linux/lsm_hook_defs.h +++ b/include/linux/lsm_hook_defs.h @@ -425,3 +425,5 @@ unsigned long maxnode, unsigned int flags) LSM_HOOK(int, 0, set_mempolicy, int mode, const unsigned long __user *nmask, unsigned long maxnode) +LSM_HOOK(int, 0, set_mempolicy_home_node, unsigned long start, unsigned long len, + unsigned long home_node, unsigned long flags) diff --git a/include/linux/security.h b/include/linux/security.h index 93c91b6a..7b7096f 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -489,6 +489,8 @@ int security_mbind(unsigned long start, unsigned long len, unsigned long maxnode, unsigned int flags); int security_set_mempolicy(int mode, const unsigned long __user *nmask, unsigned long maxnode); +int security_set_mempolicy_home_node(unsigned long start, unsigned long len, + unsigned long home_node, unsigned long flags); #else /* CONFIG_SECURITY */ static inline int call_blocking_lsm_notifier(enum lsm_event event, void *data) @@ -1413,6 +1415,12 @@ static inline int security_set_mempolicy(int mode, const unsigned long __user *n { return 0; } + +static inline int security_set_mempolicy_home_node(unsigned long start, unsigned long len, + unsigned long home_node, unsigned long flags) +{ + return 0; +} #endif /* CONFIG_SECURITY */ #if defined(CONFIG_SECURITY) && defined(CONFIG_WATCH_QUEUE) diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 0a76cd2..54106e1 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -1523,6 +1523,11 @@ static long kernel_mbind(unsigned long start, unsigned long len, return -EINVAL; if (end == start) return 0; + + err = security_set_mempolicy_home_node(start, len, home_node, flags); + if (err) + return err; + mmap_write_lock(mm); prev = vma_prev(&vmi); for_each_vma_range(vmi, vma, end) { diff --git a/security/security.c b/security/security.c index 79ae17d..0a2e062 100644 --- a/security/security.c +++ b/security/security.c @@ -5349,3 +5349,10 @@ int security_set_mempolicy(int mode, const unsigned long __user *nmask, unsigned { return call_int_hook(set_mempolicy, 0, mode, nmask, maxnode); } + +int security_set_mempolicy_home_node(unsigned long start, unsigned long len, + unsigned long home_node, unsigned long flags) +{ + + return call_int_hook(set_mempolicy_home_node, 0, start, len, home_node, flags); +}