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 X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65E81C35257 for ; Fri, 2 Oct 2020 17:40:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 35B48208A9 for ; Fri, 2 Oct 2020 17:40:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="B2AcK2G2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388534AbgJBRj4 (ORCPT ); Fri, 2 Oct 2020 13:39:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388337AbgJBRih (ORCPT ); Fri, 2 Oct 2020 13:38:37 -0400 Received: from mail-pj1-x1043.google.com (mail-pj1-x1043.google.com [IPv6:2607:f8b0:4864:20::1043]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 324F4C0613AC for ; Fri, 2 Oct 2020 10:38:36 -0700 (PDT) Received: by mail-pj1-x1043.google.com with SMTP id i3so1227003pjz.4 for ; Fri, 02 Oct 2020 10:38:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=49NcK3Fme0jYUKwd2j3ovAlb1goyRmSbkHCdODdIeDc=; b=B2AcK2G2Zh3IWqw0qnXXSEyovKhS81QCGmrhMZ3ce/zFAH8Sg5udPHdnENJ50X13Ny mEJHMqIwsp/h8jMADbLs/i5ewGbAbYqXGdprV6QTunJ845w4WHhNz8T8QGab64x5e6+Q YLHO8obovOngL6OSrlrGgaARlZ7WxNMPSsEac= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=49NcK3Fme0jYUKwd2j3ovAlb1goyRmSbkHCdODdIeDc=; b=Rm0s+ZXAp56bMfNbXzChrNgBSUs53RlP30lULBTpH7j0FLcPYwI7/NpV9bhP84An5Q XUb93Ns/EgbeGW+mE1/fNkl+FQBrRPEISJu48fCFEZrbDNmY7fK5kxl5XzpYSPFeMlew IC6JMrRTNQol54SCkJGPk15ADKh919VPsUC37kB6q8NPPqn8YazAni2mkfT8/yW1mSTr OUtx7EnV4ptRY5r2h2Q4Rqm5TokHjOdk9KgU8dkdX3JazONf3S25yV2rcencJZKNhdV6 0wzOum2oItpAfA7aLklqcqTIczRh1qZMb2cbdE332sEArNX1qxO1z0rrNx+iHBUK8eff tLLg== X-Gm-Message-State: AOAM532nHS307QU6ZXBbnPtYrtR6YrCmAjEWoNPm/BAurcsHH1dYhNPx mP2rHkq75M7RplPw7qefvXSzHQ== X-Google-Smtp-Source: ABdhPJzd49fqaj3jNCPJ5+x9jDSGu4Py3vop91Y7k3rEOOPzUXlaVdJLNBBHCW5hBUb3EGuK0nLHtQ== X-Received: by 2002:a17:90a:71c2:: with SMTP id m2mr4004540pjs.34.1601660315767; Fri, 02 Oct 2020 10:38:35 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id q65sm2660305pfq.219.2020.10.02.10.38.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 02 Oct 2020 10:38:33 -0700 (PDT) From: Kees Cook To: Greg Kroah-Hartman Cc: Kees Cook , Scott Branden , Mimi Zohar , Luis Chamberlain , Takashi Iwai , Jessica Yu , SeongJae Park , KP Singh , linux-efi@vger.kernel.org, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, selinux@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v5 00/16] Introduce partial kernel_read_file() support Date: Fri, 2 Oct 2020 10:38:12 -0700 Message-Id: <20201002173828.2099543-1-keescook@chromium.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: v5: - add more reviews (thank you!) - add "description" string to post_load_data API (mimi) - drop bug fix that got taken already v4: https://lore.kernel.org/lkml/20200729175845.1745471-1-keescook@chromium.org/ v3: https://lore.kernel.org/lkml/20200724213640.389191-1-keescook@chromium.org/ v2: lost to the ether v1: https://lore.kernel.org/lkml/20200717174309.1164575-1-keescook@chromium.org/ Hi, Here's my tree for adding partial read support in kernel_read_file(), which fixes a number of issues along the way. It's got Scott's firmware and IMA patches ported and everything tests cleanly for me (even with CONFIG_IMA_APPRAISE=y), and now appears to pass 0day. :) The intention is for this to go via Greg's tree since Scott's driver code will depend on it. Thanks, -Kees Kees Cook (12): fs/kernel_read_file: Remove FIRMWARE_PREALLOC_BUFFER enum fs/kernel_read_file: Remove FIRMWARE_EFI_EMBEDDED enum fs/kernel_read_file: Split into separate source file fs/kernel_read_file: Remove redundant size argument fs/kernel_read_file: Switch buffer size arg to size_t fs/kernel_read_file: Add file_size output argument LSM: Introduce kernel_post_load_data() hook firmware_loader: Use security_post_load_data() module: Call security_kernel_post_load_data() LSM: Add "contents" flag to kernel_read_file hook fs/kernel_file_read: Add "offset" arg for partial reads firmware: Store opt_flags in fw_priv Scott Branden (4): fs/kernel_read_file: Split into separate include file IMA: Add support for file reads without contents firmware: Add request_partial_firmware_into_buf() test_firmware: Test partial read support drivers/base/firmware_loader/fallback.c | 19 +- drivers/base/firmware_loader/fallback.h | 5 +- .../base/firmware_loader/fallback_platform.c | 12 +- drivers/base/firmware_loader/firmware.h | 7 +- drivers/base/firmware_loader/main.c | 135 ++++++++++--- fs/Makefile | 3 +- fs/exec.c | 132 +----------- fs/kernel_read_file.c | 189 ++++++++++++++++++ include/linux/firmware.h | 12 ++ include/linux/fs.h | 39 ---- include/linux/ima.h | 20 +- include/linux/kernel_read_file.h | 55 +++++ include/linux/lsm_hook_defs.h | 6 +- include/linux/lsm_hooks.h | 13 ++ include/linux/security.h | 21 +- kernel/kexec.c | 2 +- kernel/kexec_file.c | 19 +- kernel/module.c | 24 ++- lib/test_firmware.c | 154 ++++++++++++-- security/integrity/digsig.c | 8 +- security/integrity/ima/ima_fs.c | 10 +- security/integrity/ima/ima_main.c | 73 +++++-- security/integrity/ima/ima_policy.c | 1 + security/loadpin/loadpin.c | 17 +- security/security.c | 28 ++- security/selinux/hooks.c | 8 +- .../selftests/firmware/fw_filesystem.sh | 91 +++++++++ 27 files changed, 807 insertions(+), 296 deletions(-) create mode 100644 fs/kernel_read_file.c create mode 100644 include/linux/kernel_read_file.h -- 2.25.1