linux-kernel - Re: [PATCH v3 7/7] x86/Kconfig: Document release year of glibc 2.3.3

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Message-ID: <Z95mtpOJTaQIl969@gmail.com>
Date: Sat, 22 Mar 2025 08:28:54 +0100
From: Ingo Molnar <mingo@...nel.org>
To: david@...t.cz
Cc: 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>, Kees Cook <kees@...nel.org>,
	Jonathan Cameron <jic23@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>, linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org,
	Mateusz Jończyk <mat.jonczyk@...pl>,
	Andy Lutomirski <luto@...nel.org>, Brian Gerst <brgerst@...il.com>,
	Juergen Gross <jgross@...e.com>,
	Josh Poimboeuf <jpoimboe@...hat.com>,
	Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH v3 7/7] x86/Kconfig: Document release year of glibc 2.3.3


* David Heidelberg via B4 Relay <devnull+david.ixit.cz@...nel.org> wrote:

> From: Mateusz Jończyk <mat.jonczyk@...pl>
> 
> I wonder how many people were checking their glibc version when
> considering whether to enable this option.
> 
> Signed-off-by: Mateusz Jończyk <mat.jonczyk@...pl>
> Signed-off-by: David Heidelberg <david@...t.cz>
> ---
>  arch/x86/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index ba6ba3a7011554d9cb58fb0acf48d541da8ed69b..22dd962f8e5c86741a512e12596bd940cd1dae97 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -2225,7 +2225,7 @@ config HOTPLUG_CPU
>  
>  config COMPAT_VDSO
>  	def_bool n
> -	prompt "Disable the 32-bit vDSO (needed for glibc 2.3.3)"
> +	prompt "Workaround for glibc 2.3.2 / 2.3.3 (released in year 2003/2004)"
>  	depends on COMPAT_32
>  	help
>  	  Certain buggy versions of glibc will crash if they are

So I applied this patch, because it's an obvious improvement over the
status quo - but I think we should finally remove COMPAT_VDSO...

Thanks,

	Ingo