linux-kernel - Re: [PATCH] hwmon: Remove strlcpy occurences

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Message-ID: <202307121100.A6E650B@keescook>
Date:   Wed, 12 Jul 2023 11:04:05 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Azeem Shaikh <azeemshaikh38@...il.com>,
        linux-hardening@...r.kernel.org, linux-hwmon@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jean Delvare <jdelvare@...e.com>
Subject: Re: [PATCH] hwmon: Remove strlcpy occurences

On Wed, Jul 12, 2023 at 08:16:39AM -0700, Guenter Roeck wrote:
> On 7/12/23 07:44, Azeem Shaikh wrote:
> > [...]
> > +	len = strlen(result);
> >   	return simple_read_from_buffer(buf, count, ppos, tbuf, len);
> 
> This still copies tbuf, meaning all those constant strings won't actually
> be reported.

Ah dang, thanks for catching that. Yeah, "tbuf" should be replaced by
"result" in the simple_read_from_buffer().

-- 
Kees Cook