linux-hardening - Re: [PATCH v3] um: refactor deprecated strncpy to memcpy

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Message-Id: <169221967233.1236805.5075481446836951537.b4-ty@chromium.org>
Date:   Wed, 16 Aug 2023 14:01:14 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        Justin Stitt <justinstitt@...gle.com>
Cc:     Kees Cook <keescook@...omium.org>, linux-hardening@...r.kernel.org,
        linux-um@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] um: refactor deprecated strncpy to memcpy

On Wed, 09 Aug 2023 18:19:32 +0000, Justin Stitt wrote:
> Use `memcpy` since `console_buf` is not expected to be NUL-terminated
> and it more accurately describes what is happening with the buffers
> `console_buf` and `string` as per Kees' analysis [1].
> 
> Also mark char buffer as `__nonstring` as per Kees' suggestion [2].
> 
> This change now makes it more clear what this code does and that
> `console_buf` is not expected to be NUL-terminated.
> 
> [...]

Applied to for-next/hardening, thanks!

[1/1] um: refactor deprecated strncpy to memcpy
      https://git.kernel.org/kees/c/be8dffa04de3

Take care,

-- 
Kees Cook