Re: [patch 3/3] rtc: Limit frequency

From: Thomas Gleixner
Date: Sat Jul 23 2011 - 03:17:34 EST

On Fri, 22 Jul 2011, Andrew Morton wrote:

> On Fri, 22 Jul 2011 09:12:51 -0000
> Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> > The RTC hrtimer is self rearming. We really need to limit the
> > frequency to something sensible.
> > Cc: stable@xxxxxxxxxx
> Why? What failures does the current code cause? What effect do these
> failures have upon users?

Due to the hrtimer self rearming mode a user can DoS the machine
simply because it's starved by hrtimer events.

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