linux-kernel - Re: [PATCH] net: xtensa: use strscpy to copy strings

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Date:   Fri, 24 Dec 2021 03:28:42 -0800
From:   Max Filippov <jcmvbkbc@...il.com>
To:     Jason Wang <wangborong@...rlc.com>
Cc:     Chris Zankel <chris@...kel.net>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "open list:TENSILICA XTENSA PORT (xtensa)" 
        <linux-xtensa@...ux-xtensa.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: xtensa: use strscpy to copy strings

On Mon, Dec 20, 2021 at 12:46 AM Jason Wang <wangborong@...rlc.com> wrote:
>
> The strlcpy should not be used because it doesn't limit the source
> length. So that it will lead some potential bugs.
>
> But the strscpy doesn't require reading memory from the src string
> beyond the specified "count" bytes, and since the return value is
> easier to error-check than strlcpy()'s. In addition, the implementation
> is robust to the string changing out from underneath it, unlike the
> current strlcpy() implementation.
>
> Thus, replace strlcpy with strscpy.
>
> Signed-off-by: Jason Wang <wangborong@...rlc.com>
> ---
>  arch/xtensa/platforms/iss/network.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

Applied to my xtensa tree. Thanks.

-- Max