linux-kernel - Re: [PATCH] Read THREAD_CPUTIME clock from other processes.

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Message-ID: <1294430175.2016.455.camel@laptop>
Date:	Fri, 07 Jan 2011 20:56:15 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Roland McGrath <roland@...hat.com>
Cc:	Oleg Nesterov <oleg@...hat.com>,
	Dario Faggioli <raistlin@...ux.it>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	torbenh <torbenh@....de>, john.stultz@...aro.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] Read THREAD_CPUTIME clock from other  processes.

On Fri, 2011-01-07 at 11:50 -0800, Roland McGrath wrote:
> I think the constraints on /proc/.../stat reflect the most considered
> judgement of the security folks.  I suspect that the lack of constraint on
> /proc/.../schedstat reflects the scheduler folks just having failed to
> consider the same issues.  IMHO all access to the equivalent kinds of
> information should have the same security constraints. 

FWIW I'm fine with adding a PTRACE_MAY_READ constraint on schedstat.
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