From patchwork Thu Jul 7 22:32:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederick Lawler X-Patchwork-Id: 12910350 X-Patchwork-Delegate: paul@paul-moore.com Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D0ECCCA486 for ; Thu, 7 Jul 2022 22:32:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236914AbiGGWcw (ORCPT ); Thu, 7 Jul 2022 18:32:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60280 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237018AbiGGWcu (ORCPT ); Thu, 7 Jul 2022 18:32:50 -0400 Received: from mail-oi1-x233.google.com (mail-oi1-x233.google.com [IPv6:2607:f8b0:4864:20::233]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 20B9767589 for ; Thu, 7 Jul 2022 15:32:41 -0700 (PDT) Received: by mail-oi1-x233.google.com with SMTP id w62so3458448oie.3 for ; Thu, 07 Jul 2022 15:32:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cloudflare.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HPI3ojZnM++1c4f61ZRwt4MaisU1ny63+tYPCLxBNyU=; b=pPJLzKN/n3H53u85lbMzUgP5UsS4fil38YQ7/dfmeg3M8/AKwxVBk+o8JUNfyzo0BU Ma1+B6VEHpA2z1r2kpEhbf43UigQAbI7DljAQ2RMp1GasHdit7vE00Ayz/lHyMPIYe7S pfSyPARlPQPu+9DCiuXMHuQvu7ASo5GBxM43g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HPI3ojZnM++1c4f61ZRwt4MaisU1ny63+tYPCLxBNyU=; b=GTfcr6VVDf3lB8BXU7jCm02ZgIitiRR7Pwv+uakg2biX1CervGAMWSAuPo+cd0RJ7e QD8WasIpKoTI6FkAPAw0gkEVumtEZmd+GIpde//As16lmBPYgxYQW50imzDEUhhjo0TH bpyZ7ttz+ZUerK4tGtNLNW8UX+C5xQCBFs2JPH1x3f3mT9ez+vw6MGriHIpJ7TP5IiM2 dJtMq6l0/ToU2FkQe4VmXopWAL7oWmrDVOMYDeymkNWoVYI8febEB8fUvliv4/5xjSoA jVdGUYIdO5lOzmaC7pWmmE5vSHDNTOWhg4tlWxys6wov6u+2saBfQk7fy+R2URfARNvw FUsQ== X-Gm-Message-State: AJIora/bOhJOkoMp8ZpJl5lHcqfb+Sed+9vYgcChD33FCgcR3cYta8gE zX1JvcQ4zk1zoEUhdnPFwWwUgg== X-Google-Smtp-Source: AGRyM1tcIEZsE2gFDfWZ+ydTaErjmU0vLWY1y/NAd+s5mkdDoWOmXG6TCxhhNFR7u0n6nfjScfGdRg== X-Received: by 2002:a05:6808:11c4:b0:2d9:c395:f15e with SMTP id p4-20020a05680811c400b002d9c395f15emr3824812oiv.47.1657233160506; Thu, 07 Jul 2022 15:32:40 -0700 (PDT) Received: from localhost.localdomain ([184.4.90.121]) by smtp.gmail.com with ESMTPSA id i16-20020a05683033f000b00616b835f5e7sm16246222otu.43.2022.07.07.15.32.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Jul 2022 15:32:39 -0700 (PDT) From: Frederick Lawler To: kpsingh@kernel.org, revest@chromium.org, jackmanb@chromium.org, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, jmorris@namei.org, serge@hallyn.com, paul@paul-moore.com, stephen.smalley.work@gmail.com, eparis@parisplace.org, shuah@kernel.org, brauner@kernel.org, casey@schaufler-ca.com, ebiederm@xmission.com, bpf@vger.kernel.org, linux-security-module@vger.kernel.org, selinux@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, kernel-team@cloudflare.com, Frederick Lawler Subject: [PATCH v2 2/4] bpf-lsm: Make bpf_lsm_create_user_ns() sleepable Date: Thu, 7 Jul 2022 17:32:26 -0500 Message-Id: <20220707223228.1940249-3-fred@cloudflare.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220707223228.1940249-1-fred@cloudflare.com> References: <20220707223228.1940249-1-fred@cloudflare.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: selinux@vger.kernel.org Users may want to audit calls to security_create_user_ns() and access user space memory. Also create_user_ns() runs without pagefault_disabled(). Therefore, make bpf_lsm_create_user_ns() sleepable for mandatory access control policies. Signed-off-by: Frederick Lawler --- Changes since v1: - None --- kernel/bpf/bpf_lsm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/bpf/bpf_lsm.c b/kernel/bpf/bpf_lsm.c index c1351df9f7ee..75853965e7b0 100644 --- a/kernel/bpf/bpf_lsm.c +++ b/kernel/bpf/bpf_lsm.c @@ -250,6 +250,7 @@ BTF_ID(func, bpf_lsm_task_getsecid_obj) BTF_ID(func, bpf_lsm_task_prctl) BTF_ID(func, bpf_lsm_task_setscheduler) BTF_ID(func, bpf_lsm_task_to_inode) +BTF_ID(func, bpf_lsm_create_user_ns) BTF_SET_END(sleepable_lsm_hooks) bool bpf_lsm_is_sleepable_hook(u32 btf_id)