Messages in this thread | | | Date | Wed, 17 Nov 2010 18:21:11 +0100 | From | Marcus Meissner <> | Subject | Re: [PATCH] kernel/time: Make /proc/timer_list mode 0400 |
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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
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