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From: James Morris <jmorris@namei.org>
To: Kees Cook <keescook@chromium.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Mimi Zohar <zohar@linux.ibm.com>,
	Luis Chamberlain <mcgrof@kernel.org>,
	Scott Branden <scott.branden@broadcom.com>,
	stable@vger.kernel.org, Takashi Iwai <tiwai@suse.de>,
	Jessica Yu <jeyu@kernel.org>, SeongJae Park <sjpark@amazon.de>,
	KP Singh <kpsingh@chromium.org>,
	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: Re: [PATCH v5 01/16] fs/kernel_read_file: Remove FIRMWARE_PREALLOC_BUFFER enum
Date: Wed, 7 Oct 2020 04:17:52 +1100 (AEDT)
Message-ID: <alpine.LRH.2.21.2010070417400.18879@namei.org> (raw)
In-Reply-To: <20201002173828.2099543-2-keescook@chromium.org>

On Fri, 2 Oct 2020, Kees Cook wrote:

> FIRMWARE_PREALLOC_BUFFER is a "how", not a "what", and confuses the LSMs
> that are interested in filtering between types of things. The "how"
> should be an internal detail made uninteresting to the LSMs.
> 
> Fixes: a098ecd2fa7d ("firmware: support loading into a pre-allocated buffer")
> Fixes: fd90bc559bfb ("ima: based on policy verify firmware signatures (pre-allocated buffer)")
> Fixes: 4f0496d8ffa3 ("ima: based on policy warn about loading firmware (pre-allocated buffer)")
> Signed-off-by: Kees Cook <keescook@chromium.org>
> Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
> Acked-by: Scott Branden <scott.branden@broadcom.com>
> Cc: stable@vger.kernel.org


Reviewed-by: James Morris <jamorris@linux.microsoft.com>


-- 
James Morris
<jmorris@namei.org>


  reply index

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-02 17:38 [PATCH v5 00/16] Introduce partial kernel_read_file() support Kees Cook
2020-10-02 17:38 ` [PATCH v5 01/16] fs/kernel_read_file: Remove FIRMWARE_PREALLOC_BUFFER enum Kees Cook
2020-10-06 17:17   ` James Morris [this message]
2020-10-02 17:38 ` [PATCH v5 02/16] fs/kernel_read_file: Remove FIRMWARE_EFI_EMBEDDED enum Kees Cook
2020-10-02 17:38 ` [PATCH v5 03/16] fs/kernel_read_file: Split into separate include file Kees Cook
2020-10-02 17:38 ` [PATCH v5 04/16] fs/kernel_read_file: Split into separate source file Kees Cook
2020-10-06 17:18   ` James Morris
2020-10-02 17:38 ` [PATCH v5 05/16] fs/kernel_read_file: Remove redundant size argument Kees Cook
2020-10-02 17:38 ` [PATCH v5 06/16] fs/kernel_read_file: Switch buffer size arg to size_t Kees Cook
2020-10-02 17:38 ` [PATCH v5 07/16] fs/kernel_read_file: Add file_size output argument Kees Cook
2020-10-02 17:38 ` [PATCH v5 08/16] LSM: Introduce kernel_post_load_data() hook Kees Cook
2020-10-02 17:38 ` [PATCH v5 09/16] firmware_loader: Use security_post_load_data() Kees Cook
2020-10-02 17:38 ` [PATCH v5 10/16] module: Call security_kernel_post_load_data() Kees Cook
2020-10-06 17:19   ` James Morris
2020-10-02 17:38 ` [PATCH v5 11/16] LSM: Add "contents" flag to kernel_read_file hook Kees Cook
2020-10-06 17:19   ` James Morris
2020-10-02 17:38 ` [PATCH v5 12/16] IMA: Add support for file reads without contents Kees Cook
2020-10-02 17:38 ` [PATCH v5 13/16] fs/kernel_file_read: Add "offset" arg for partial reads Kees Cook
2020-10-02 17:38 ` [PATCH v5 14/16] firmware: Store opt_flags in fw_priv Kees Cook
2020-10-02 17:38 ` [PATCH v5 15/16] firmware: Add request_partial_firmware_into_buf() Kees Cook
2020-10-02 17:38 ` [PATCH v5 16/16] test_firmware: Test partial read support Kees Cook

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