linux-hardening - Re: [PATCH] x86/tdx: refactor deprecated strncpy

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Date: Fri, 29 Sep 2023 11:33:46 -0700
From: Kees Cook <keescook@...omium.org>
To: Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Justin Stitt <justinstitt@...gle.com>
Cc: Kees Cook <keescook@...omium.org>,
	linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org,
	Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH] x86/tdx: refactor deprecated strncpy

On Mon, 11 Sep 2023 18:27:25 +0000, Justin Stitt wrote:
> `strncpy` is deprecated and we should prefer more robust string apis.
> 
> In this case, `message.str` is not expected to be NUL-terminated as it
> is simply a buffer of characters residing in a union which allows for
> named fields representing 8 bytes each. There is only one caller of
> `tdx_panic()` and they use a 59-length string for `msg`:
> |	const char *msg = "TD misconfiguration: SEPT_VE_DISABLE attribute must be set.";
> 
> [...]

This appears to be trivially correct, so I can take it via my tree.

Applied to for-next/hardening, thanks!

[1/1] x86/tdx: refactor deprecated strncpy
      https://git.kernel.org/kees/c/e32c46753312

Take care,

-- 
Kees Cook