linux-hardening - Re: [PATCH v2] wifi: iwlwifi: fw: replace deprecated strncpy with strscpy

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Message-ID: <170143434079.2072551.9169872706121192136.kvalo@kernel.org>
Date: Fri,  1 Dec 2023 12:39:02 +0000 (UTC)
From: Kalle Valo <kvalo@...nel.org>
To: Justin Stitt <justinstitt@...gle.com>
Cc: Gregory Greenman <gregory.greenman@...el.com>,
 linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-hardening@...r.kernel.org, Justin Stitt <justinstitt@...gle.com>
Subject: Re: [PATCH v2] wifi: iwlwifi: fw: replace deprecated strncpy with
 strscpy_pad

Justin Stitt <justinstitt@...gle.com> 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.
> 
> Based on the deliberate `sizeof(dest) ... - 1` pattern we can see that
> both dump_info->dev_human_readable and dump_info->bus_human_readable are
> intended to be NUL-terminated.
> 
> Moreover, since this seems to cross the file boundary let's NUL-pad to
> ensure no behavior change.
> 
> strscpy_pad() covers both the NUL-termination and NUL-padding, let's use
> it.
> 
> Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1]
> Link: https://github.com/KSPP/linux/issues/90
> Cc: linux-hardening@...r.kernel.org
> Signed-off-by: Justin Stitt <justinstitt@...gle.com>
> Reviewed-by: Kees Cook <keescook@...omium.org>

Patch applied to wireless-next.git, thanks.

70582e26f5d9 wifi: iwlwifi: fw: replace deprecated strncpy with strscpy_pad

-- 
https://patchwork.kernel.org/project/linux-wireless/patch/20231019-strncpy-drivers-net-wireless-intel-iwlwifi-fw-dbg-c-v2-1-179b211a374b@google.com/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches