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SubjectRe: [PATCH] kernel/time: Make /proc/timer_list mode 0400
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On Wed, 2010-11-17 at 18:21 +0100, Marcus Meissner wrote:
> 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

I know, but you said you didn't know of a tool that used the file.. now
you do ;-)


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