linux-kernel - Re: [PATCH] nvme-fabrics: replace deprecated strncpy with strscpy

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Message-Id: <170138165207.3649333.12518532307083460238.b4-ty@chromium.org>
Date:   Thu, 30 Nov 2023 14:00:54 -0800
From:   Kees Cook <keescook@...omium.org>
To:     Keith Busch <kbusch@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@....de>,
        Sagi Grimberg <sagi@...mberg.me>,
        Justin Stitt <justinstitt@...gle.com>
Cc:     Kees Cook <keescook@...omium.org>, linux-nvme@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org
Subject: Re: [PATCH] nvme-fabrics: replace deprecated strncpy with strscpy

On Wed, 18 Oct 2023 22:48:49 +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.
> 
> We expect both data->subsysnqn and data->hostnqn to be NUL-terminated
> based on their usage with format specifier ("%s"):
> fabrics.c:
> 322: dev_err(ctrl->device,
> 323:   "%s, subsysnqn \"%s\"\n",
> 324:   inv_data, data->subsysnqn);
> ...
> 349: dev_err(ctrl->device,
> 350: 	 "Connect for subsystem %s is not allowed, hostnqn: %s\n",
> 351: 	 data->subsysnqn, data->hostnqn);
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] nvme-fabrics: replace deprecated strncpy with strscpy
      https://git.kernel.org/kees/c/5ef935fd5520

Take care,

-- 
Kees Cook