From mboxrd@z Thu Jan 1 00:00:00 1970 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 8258FC43334 for ; Tue, 21 Jun 2022 23:40:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355007AbiFUXj7 (ORCPT ); Tue, 21 Jun 2022 19:39:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44638 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353748AbiFUXjw (ORCPT ); Tue, 21 Jun 2022 19:39:52 -0400 Received: from mail-oa1-x2d.google.com (mail-oa1-x2d.google.com [IPv6:2001:4860:4864:20::2d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F1A831222 for ; Tue, 21 Jun 2022 16:39:51 -0700 (PDT) Received: by mail-oa1-x2d.google.com with SMTP id 586e51a60fabf-101d96fe0a5so10910355fac.2 for ; Tue, 21 Jun 2022 16:39:51 -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=jUmOqM8bvsG8cDfx+XvNCDDl82awPaNafAtF5jFkQEY=; b=o5t9urnpI0OdvMgRHCew9GBUrfvNLmNKP8PEUMDjteDWRX9zW0tnOI51xheMxEFYAJ 5SEdi6X2zEaSJF4Ud4OzuVLtfivzHa7Ctp2wYHZsqHTr8iBuDQVvzZN4vZpmSiqciPwK VVjhfdZ+3Ur1hFKuRE3jvHYIR5noV4NdKabvc= 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=jUmOqM8bvsG8cDfx+XvNCDDl82awPaNafAtF5jFkQEY=; b=tTqk3XjSamInYjNluQZ5RZN/INWgUw6LU+kPmM9sg1OCNVSpw48sNTf4Ni3dBTdy7h DkHTvzR/47wNlQ5TxQXpQ3ckYN0vcL/u6jm13xRpW4oja6PL3K/J5B1w3iSV8cS9SDhE 3HbM1+dfr8LYP6707SRjKAY4KC2aVB/suFRXZxxDOxMNZ6rDxKv2oWTeX0p3LvVuH93b R5ecsZUKEiu1xFam4LpfCatVU/rDgzfBDPinTs3LncsCcJsFp5Uapy0SSKIy8gqoA7mj nrlm+VCWRdcfN10IXV/euuSb116rf0v6qVqTj0MJal+S4LecJZi2IW8s/2JaU2tnYdKv 36Jg== X-Gm-Message-State: AJIora9t1m9kKRRKpj2X7PoUSbj+kL8z8HAElyYKORgEJHIEzHzthIcK 52wE7W6fzVXk5iFij8Zbc349SQ== X-Google-Smtp-Source: AGRyM1t7CRjxualNOBRcURL8BoZp/Y8//UgT00jArGQfdCguxh7jvEelxlI+yNApXmiS4XDdhSPRvQ== X-Received: by 2002:a05:6870:8909:b0:101:202e:a71d with SMTP id i9-20020a056870890900b00101202ea71dmr371858oao.272.1655854790690; Tue, 21 Jun 2022 16:39:50 -0700 (PDT) Received: from localhost.localdomain ([172.58.70.161]) by smtp.gmail.com with ESMTPSA id v73-20020acaac4c000000b00326414c1bb7sm9839181oie.35.2022.06.21.16.39.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 21 Jun 2022 16:39:50 -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, bpf@vger.kernel.org, linux-security-module@vger.kernel.org Cc: brauner@kernel.org, casey@schaufler-ca.com, paul@paul-moore.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@cloudflare.com, Frederick Lawler Subject: [PATCH 2/2] bpf-lsm: Make bpf_lsm_create_user_ns() sleepable Date: Tue, 21 Jun 2022 18:39:39 -0500 Message-Id: <20220621233939.993579-3-fred@cloudflare.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220621233939.993579-1-fred@cloudflare.com> References: <20220621233939.993579-1-fred@cloudflare.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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_create_user_ns() sleepable for mandatory access control policies. Signed-off-by: Frederick Lawler --- 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) -- 2.30.2