linux-kernel - Re: [PATCH] xen/mcelog: Add __nonstring annotations for unterminated strings

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Message-ID: <78d2f36a-a2be-4fb6-8484-6fa0df50a419@suse.com>
Date: Tue, 11 Mar 2025 08:35:11 +0100
From: Jürgen Groß <jgross@...e.com>
To: Kees Cook <kees@...nel.org>
Cc: Stefano Stabellini <sstabellini@...nel.org>,
 Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>,
 xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
 linux-hardening@...r.kernel.org
Subject: Re: [PATCH] xen/mcelog: Add __nonstring annotations for unterminated
 strings

On 10.03.25 23:22, Kees Cook wrote:
> When a character array without a terminating NUL character has a static
> initializer, GCC 15's -Wunterminated-string-initialization will only
> warn if the array lacks the "nonstring" attribute[1]. Mark the arrays
> with __nonstring to and correctly identify the char array as "not a C
> string" and thereby eliminate the warning.
> 
> Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117178 [1]
> Cc: Juergen Gross <jgross@...e.com>
> Cc: Stefano Stabellini <sstabellini@...nel.org>
> Cc: Oleksandr Tyshchenko <oleksandr_tyshchenko@...m.com>
> Cc: xen-devel@...ts.xenproject.org
> Signed-off-by: Kees Cook <kees@...nel.org>

Acked-by: Juergen Gross <jgross@...e.com>


Juergen

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