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Date: Wed, 17 Nov 2010 18:21:11 +0100 From: Marcus Meissner <meissner@...e.de> To: Peter Zijlstra <a.p.zijlstra@...llo.nl> Cc: tglx@...utronix.de, mingo@...e.hu, akpm@...ux-foundation.org, rusty@...tcorp.com.au, torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] kernel/time: Make /proc/timer_list mode 0400 On Wed, Nov 17, 2010 at 06:18:32PM +0100, Peter Zijlstra wrote: > On Wed, 2010-11-17 at 18:08 +0100, Marcus Meissner wrote: > > Hi, > > > > /proc/timer_list contains kernel addresses, like e.g.: > > #0: <c000000001404158>, tick_sched_timer, S:01, .tick_nohz_restart_sched_tick, swapper/0 > > ... > > > > Avoid leaking them to user space to make writing kernel exploits a bit harder. > > > > (I currently cannot think of a userland tool that uses this, this is > > likely pretty much root-only.) > > iirc powertop parses this.. powertop already says on startup: PowerTOP needs to be run as root to collect enough information And as developer tool it usually is for people having root access. Ciao, Marcus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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