From patchwork Tue Jun 21 23:39:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frederick Lawler X-Patchwork-Id: 12889937 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 34116CCA481 for ; Tue, 21 Jun 2022 23:39:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1354552AbiFUXjy (ORCPT ); Tue, 21 Jun 2022 19:39:54 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1354146AbiFUXjw (ORCPT ); Tue, 21 Jun 2022 19:39:52 -0400 Received: from mail-oa1-x32.google.com (mail-oa1-x32.google.com [IPv6:2001:4860:4864:20::32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F32CC31226 for ; Tue, 21 Jun 2022 16:39:51 -0700 (PDT) Received: by mail-oa1-x32.google.com with SMTP id 586e51a60fabf-101bb9275bcso15473236fac.8 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=Q6O32y+XDBaS/ShQabGVmK8bWlyMTUtUvrqkwGeOvVBwnv0afT0L+TrkWRUR8AtOVu MYugTFxyDjatjwjpYHaBpoV6liTstVif1wk/P8GIXYAXHFambwuAM/NtAjkUPM3X24W2 Dw9hZFa9Vefmy9QP7W0V0C5hGCPdzs/fA4gueqY0xSuF4bAmY605cP3lw18DoVl2hgmm JD4oSrJUIA81Ot+tdam8KT2FpT/ECijn0bEItx0dYavETPgslAHk/hS0dsKl/2/8bUyC XihaMRhS3c89IT/z+9vqWL6S0V5lV/DnM+0oG04PIYSJYstjipYfqS6sjlLgD3e6SPBa wv/Q== X-Gm-Message-State: AJIora/NG37r+zxDMbRzd7eIqStVQePm7SjBjKK1u2IV0+cyB7UmPcf+ 6yJwzWrWALeLqiEvEK4W5022rg== 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 Precedence: bulk List-ID: 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)