linux-hardening - Re: [PATCH] leds: blinkm: Replace all non-returning strlcpy with strscpy

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Message-ID: <20230525113127.GD423913@google.com>
Date:   Thu, 25 May 2023 12:31:27 +0100
From:   Lee Jones <lee@...nel.org>
To:     Azeem Shaikh <azeemshaikh38@...il.com>
Cc:     Jan-Simon Moeller <jansimon.moeller@....de>,
        linux-hardening@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pavel Machek <pavel@....cz>, linux-leds@...r.kernel.org
Subject: Re: [PATCH] leds: blinkm: Replace all non-returning strlcpy with
 strscpy

On Tue, 23 May 2023, Azeem Shaikh wrote:

> strlcpy() reads the entire source buffer first.
> This read may exceed the destination size limit.
> This is both inefficient and can lead to linear read
> overflows if a source string is not NUL-terminated [1].
> In an effort to remove strlcpy() completely [2], replace
> strlcpy() here with strscpy().
> No return values were used, so direct replacement is safe.
> 
> [1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
> [2] https://github.com/KSPP/linux/issues/89
> 
> Signed-off-by: Azeem Shaikh <azeemshaikh38@...il.com>
> ---
>  drivers/leds/leds-blinkm.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks

-- 
Lee Jones [李琼斯]