linux-kernel - Re: [PATCH v4 07/17] fs/kernel_read_file: Switch buffer size arg to size

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Date:   Thu, 30 Jul 2020 12:25:27 +1000 (AEST)
From:   James Morris <jmorris@...ei.org>
To:     Kees Cook <keescook@...omium.org>
cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Scott Branden <scott.branden@...adcom.com>,
        Mimi Zohar <zohar@...ux.ibm.com>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Takashi Iwai <tiwai@...e.de>, Jessica Yu <jeyu@...nel.org>,
        SeongJae Park <sjpark@...zon.de>,
        KP Singh <kpsingh@...omium.org>, linux-efi@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-integrity@...r.kernel.org, selinux@...r.kernel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 07/17] fs/kernel_read_file: Switch buffer size arg to
 size_t

On Wed, 29 Jul 2020, Kees Cook wrote:

> In preparation for further refactoring of kernel_read_file*(), rename
> the "max_size" argument to the more accurate "buf_size", and correct
> its type to size_t. Add kerndoc to explain the specifics of how the
> arguments will be used. Note that with buf_size now size_t, it can no
> longer be negative (and was never called with a negative value). Adjust
> callers to use it as a "maximum size" when *buf is NULL.
> 
> Acked-by: Scott Branden <scott.branden@...adcom.com>
> Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
> Reviewed-by: Luis Chamberlain <mcgrof@...nel.org>
> Signed-off-by: Kees Cook <keescook@...omium.org>


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


-- 
James Morris
<jmorris@...ei.org>