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[2620:137:e000::1:20]) by mx.google.com with ESMTP id f62-20020a636a41000000b0040d275d3fcesi2494096pgc.661.2022.07.21.10.30.16; Thu, 21 Jul 2022 10:30:30 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@cloudflare.com header.s=google header.b=F39o6zdL; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=cloudflare.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231926AbiGUR2m (ORCPT + 99 others); Thu, 21 Jul 2022 13:28:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54674 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231489AbiGUR22 (ORCPT ); Thu, 21 Jul 2022 13:28:28 -0400 Received: from mail-oa1-x34.google.com (mail-oa1-x34.google.com [IPv6:2001:4860:4864:20::34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F183C8AEC7 for ; Thu, 21 Jul 2022 10:28:18 -0700 (PDT) Received: by mail-oa1-x34.google.com with SMTP id 586e51a60fabf-f2a4c51c45so3281205fac.9 for ; Thu, 21 Jul 2022 10:28:18 -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=g6LYDJ5GUZQ1KxKmuQvjM8e+PjJ6MYTVNoyEg+XMI5E=; b=F39o6zdL20qsFmVOEom+uZ7fZ1c6R3EBwJRsLcWhmxXYO27c6yuW+TxLtfux5NlgDH irmniKptcO3EquVJiLXT4swrivgKEjFsVwhHaOVwvQVf4TU8rP/Px4s8VIliE+DPGanH T7MHIVfNsMtTbYomDDw28omIpxiFgcqexK0jY= 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=g6LYDJ5GUZQ1KxKmuQvjM8e+PjJ6MYTVNoyEg+XMI5E=; b=T2Xu7uknrZsXqN6jQgmMsyqOUsD+Rc/mI3rrYAFNFpTgqha92BEzU0W37ovJ+U/3v7 s0pk12RFaQeCWiZ2lhCcIEWNv6C6X99KrDZb+4Jnous7+hzx0WQovWsMqv2pw6EllZ/h OwED3z0bwwNYHiVXsF3KTWAham0clP4rHH7lyU4Qoic6Pyqpn/z4wPZhEn63zcWXejKk ctQ1w7/qqeCS03ABW+eyYwRoQ+etg5H7zi0vDeUTbuTP4w3htOFbojBo9aAIyeZxyHDe b0A0aAd0VSj9Pne415BbCRqfIJx++I29jzOBPx5tylILl9hIN9GeB638vkHwbNSI8Mgb 13fg== X-Gm-Message-State: AJIora+vIYLwiNDqh5x9b9Dn+jjUfGRxGneYP/jmujPxLc84lGNti1jS IGFNSizf92UvSZYviIfxGRQ4Og== X-Received: by 2002:a05:6870:b398:b0:10d:67e:c615 with SMTP id w24-20020a056870b39800b0010d067ec615mr5426833oap.203.1658424498275; Thu, 21 Jul 2022 10:28:18 -0700 (PDT) Received: from localhost.localdomain ([184.4.90.121]) by smtp.gmail.com with ESMTPSA id du24-20020a0568703a1800b00101c83352c6sm1106207oab.34.2022.07.21.10.28.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Jul 2022 10:28:17 -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, cgzones@googlemail.com, karl@bigbadwolfsecurity.com, Frederick Lawler Subject: [PATCH v3 2/4] bpf-lsm: Make bpf_lsm_userns_create() sleepable Date: Thu, 21 Jul 2022 12:28:06 -0500 Message-Id: <20220721172808.585539-3-fred@cloudflare.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220721172808.585539-1-fred@cloudflare.com> References: <20220721172808.585539-1-fred@cloudflare.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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_userns_create() sleepable for mandatory access control policies. Signed-off-by: Frederick Lawler --- Changes since v2: - Rename create_user_ns hook to userns_create 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..4593437809cc 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_userns_create) BTF_SET_END(sleepable_lsm_hooks) bool bpf_lsm_is_sleepable_hook(u32 btf_id) -- 2.30.2