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Date: Tue, 19 Mar 2024 19:43:13 -0700
From: Kees Cook <keescook@chromium.org>
To: Justin Stitt <justinstitt@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-hardening@vger.kernel.org
Subject: Re: [PATCH] usb: gadget: u_ether: replace deprecated strncpy with
 strscpy
Message-ID: <202403191943.3F041A01CB@keescook>
References: <20240318-strncpy-drivers-usb-gadget-function-u_ether-c-v1-1-e8543a1db24a@google.com>
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In-Reply-To: <20240318-strncpy-drivers-usb-gadget-function-u_ether-c-v1-1-e8543a1db24a@google.com>

On Mon, Mar 18, 2024 at 11:10:34PM +0000, Justin Stitt wrote:
> strncpy() is deprecated for use on NUL-terminated destination strings
> [1] and as such we should prefer more robust and less ambiguous string
> interfaces.
> 
> Let's use the new 2-argument strscpy() as this guarantees
> NUL-termination on the destination buffer and also uses the destination
> buffer's size to bound the operation.
> 
> Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
> Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2]
> Link: https://github.com/KSPP/linux/issues/90
> Cc: linux-hardening@vger.kernel.org
> Signed-off-by: Justin Stitt <justinstitt@google.com>

Looks correct. Thanks!

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook