linux-kernel - Re: Question about strings of string

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Message-ID: <202502241928.4405326B13@keescook>
Date: Mon, 24 Feb 2025 19:29:55 -0800
From: Kees Cook <kees@...nel.org>
To: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc: Andy Shevchenko <andy@...nel.org>, linux-hardening@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Question about strings of string_choices.h

On Tue, Feb 25, 2025 at 01:43:55AM +0000, Kuninori Morimoto wrote:
> 
> Hi Kees, Andy
> 
> I would like to use string_choices helper, and want to add well used
> but not yet supported strings. But before that I would like to ask one
> thing about it.
> 
> I wonder is it guaranteed that the strings were persist after the
> function returned ? In normally, function local variable will disappear
> when it returns from the function. But I'm not sure in case of
> static inline const, etc.
> 
> If it is guaranteed, I'm very happy.

Yes, the compiler puts them in the .rodata section, so they will always
be present.

-Kees

-- 
Kees Cook