From patchwork Wed Jul 29 17:58:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kees Cook X-Patchwork-Id: 11691451 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 85E811392 for ; Wed, 29 Jul 2020 17:59:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FD5021883 for ; Wed, 29 Jul 2020 17:59:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="dJ9IJZFA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727794AbgG2R7A (ORCPT ); Wed, 29 Jul 2020 13:59:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35692 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727811AbgG2R66 (ORCPT ); Wed, 29 Jul 2020 13:58:58 -0400 Received: from mail-pf1-x444.google.com (mail-pf1-x444.google.com [IPv6:2607:f8b0:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB835C0619DD for ; Wed, 29 Jul 2020 10:58:57 -0700 (PDT) Received: by mail-pf1-x444.google.com with SMTP id m8so6469867pfh.3 for ; Wed, 29 Jul 2020 10:58:57 -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=l8qt6NAOeJyvaC4CtbxP5H/W0DvGbou/HHI7SemtTDA=; b=dJ9IJZFAtwa4MwTQF04JKQ82W7CcnprUt/ARSlcv975KRLPZw5QjYP634YQ+iCPFvg Y5ixlGhSCg9q/oaV7QjEd3rfMgokmldpS1nm61sWMNFynYEWVKsNmB85sMNLOTG2O88e Fyyfen0e/BaDate0J313xFGgHUmmA6lX1DmE0= 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=l8qt6NAOeJyvaC4CtbxP5H/W0DvGbou/HHI7SemtTDA=; b=K54nO3WBnGhVT0eTUSYeNR+PU+qib7Gm4v5IW/MkRggk7eHQbBVmOLwYnvU7NSPXFl exDC4QBZpympxpBGF3CSj1dZtZ2d/z7WTta7WinYEG44uPQ/U0FBwudH1yw7nyQHKbgO KL2maaeK9CO044mBktoHLASKWbdnBF8ikEe9x9AfOr6eR0MaT1Xpia7TsF56idmcjJXq lDDyd3F2UEy4rocZy4hsClDZpp2ptrnHipgPDXlFd0OoYZTKDm36oOYyBo2EjanI1222 kjKYMBdoXBRW0VGGZXqwpgmDbSSsLvPEZB28jiK1td1GBHx1mVZiU4+B+Y3/o3dxv9t+ O/hw== X-Gm-Message-State: AOAM532JxYv7FPO4KxjZITSVg46iWmZrUMh5+4GWbFMdWdtClXWCeXXo sBdjQitIQUpCWvLp3joV3eMPHA== X-Google-Smtp-Source: ABdhPJwt43WfKvGpI4vogWMtKRdtxeUwOurnGazObk+rZA1J3axI6ETZEe9ItvQsMYAhNcI6jd8Hkg== X-Received: by 2002:a62:3185:: with SMTP id x127mr30031402pfx.290.1596045537240; Wed, 29 Jul 2020 10:58:57 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id j10sm3124764pgh.28.2020.07.29.10.58.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 29 Jul 2020 10:58:53 -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 v4 00/17] Introduce partial kernel_read_file() support Date: Wed, 29 Jul 2020 10:58:28 -0700 Message-Id: <20200729175845.1745471-1-keescook@chromium.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org v4: - add more reviews (mimi, luis) - adjusted comment (mimi) - fixed build error when not building firmware tests (0day, sfr) - fixed needless .xz read (tiwai) - rebased to driver-core-next 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 (13): test_firmware: Test platform fw loading on non-EFI systems 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 | 11 +- drivers/base/firmware_loader/firmware.h | 7 +- drivers/base/firmware_loader/main.c | 135 ++++++++++--- drivers/firmware/efi/embedded-firmware.c | 21 +- drivers/firmware/efi/embedded-firmware.h | 21 ++ fs/Makefile | 3 +- fs/exec.c | 132 +----------- fs/kernel_read_file.c | 189 ++++++++++++++++++ include/linux/efi_embedded_fw.h | 13 -- include/linux/firmware.h | 12 ++ include/linux/fs.h | 39 ---- include/linux/ima.h | 19 +- include/linux/kernel_read_file.h | 55 +++++ include/linux/lsm_hook_defs.h | 6 +- include/linux/lsm_hooks.h | 12 ++ include/linux/security.h | 19 +- kernel/kexec.c | 2 +- kernel/kexec_file.c | 19 +- kernel/module.c | 24 ++- lib/test_firmware.c | 159 +++++++++++++-- security/integrity/digsig.c | 8 +- security/integrity/ima/ima_fs.c | 10 +- security/integrity/ima/ima_main.c | 70 +++++-- security/integrity/ima/ima_policy.c | 1 + security/loadpin/loadpin.c | 17 +- security/security.c | 26 ++- security/selinux/hooks.c | 8 +- .../selftests/firmware/fw_filesystem.sh | 91 +++++++++ 30 files changed, 839 insertions(+), 314 deletions(-) create mode 100644 drivers/firmware/efi/embedded-firmware.h create mode 100644 fs/kernel_read_file.c create mode 100644 include/linux/kernel_read_file.h