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From: Greg KH <gregkh@linuxfoundation.org>
To: Vic B <linux@vicb.net>
Cc: linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org,
	Kees Cook <keescook@chromium.org>
Subject: Re: [PATCH] security: Restrict unprivileged access to /proc/config.gz
Date: Mon, 9 Nov 2026 15:38:16 -0500	[thread overview]
Message-ID: <2026110958-outlying-dreamy-b249@gregkh> (raw)
In-Reply-To: <avCF9zEHV48EHjgG@vicb.net>

On Sun, Nov 08, 2026 at 03:23:51PM +0100, Vic B wrote:
> When using CONFIG_IKCONFIG_PROC, the built-in configuration is
> world-readable through /proc/config.gz, which somewhat weakens existing
> address hiding defences, as it allows an unprivileged user to simply
> read built-in config from the running kernel and build their own copy
> with identical System.map.
> 
> This patch adds a configuration option to restrict access to
> /proc/config.gz to superuser only.
> 
> Signed-off-by: Vic B <linux@vicb.net>

Full name please.

But really, a .config file is not a secret, this isn't needed, sorry.

greg k-h

  reply	other threads:[~2026-11-09 20:38 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-08 14:23 [PATCH] security: Restrict unprivileged access to /proc/config.gz Vic B
2026-11-09 20:38 ` Greg KH [this message]
2026-11-09 22:19   ` Vic B

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