linux-kernel - [PATCH 0/2] sysctl: allow CLONE

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Date:	Fri, 22 Jan 2016 14:39:03 -0800
From:	Kees Cook <keescook@...omium.org>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Kees Cook <keescook@...omium.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Richard Weinberger <richard@....at>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andy Lutomirski <luto@...capital.net>,
	Robert Święcki <robert@...ecki.net>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	David Howells <dhowells@...hat.com>,
	Miklos Szeredi <mszeredi@...e.cz>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-hardening@...ts.openwall.com
Subject: [PATCH 0/2] sysctl: allow CLONE_NEWUSER to be disabled 

There continues to be unexpected side-effects and security exposures
via CLONE_NEWUSER. For many end-users running distro kernels with
CONFIG_USER_NS enabled, there is no way to disable this feature when
desired. As such, this creates a sysctl to restrict CLONE_NEWUSER so
admins not running containers or Chrome can avoid the risks of this
feature.

-Kees