linux-kernel - Re: [PATCH] Forbid invocation of kexec_load() outside initial PID namespace

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Message-ID: <cfa2e2c9-db52-40cd-979b-7a6084427190@email.android.com>
Date:	Fri, 03 Aug 2012 05:45:40 -0700
From:	"Eric W. Biederman" <ebiederm@...ssion.com>
To:	"Daniel P. Berrange" <berrange@...hat.com>,
	linux-kernel@...r.kernel.org
CC:	containers@...ts.linux-foundation.org,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Daniel Lezcano <daniel.lezcano@...e.fr>,
	Michael Kerrisk <mtk.manpages@...il.com>,
	Tejun Heo <tj@...nel.org>, Oleg Nesterov <oleg@...hat.com>
Subject: Re: [PATCH] Forbid invocation of kexec_load() outside initial PID namespace

The solution is to use user namespaces and to only test ns_capable on the magic reboot path.

For the 3.7 timeframe that should be a realistic solution.

Eric
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