Re: [PATCH] hrtimer: prevent overrun DoS in hrtimer_forward()

[Ingo Molnar]

* Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:

> hrtimer_forward() does not check for the possible overflow of 
> timer->expires. This can happen on 64 bit machines with large interval 
> values and results currently in an endless loop in the softirq because 
> the expiry value becomes negative and therefor the timer is expired 
> all the time.
> 
> Check for this condition and set the expiry value to the max. expiry 
> time in the future.
> 
> The fix should be applied to stable kernel series as well.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix,de>

ouch ... nice one.

Acked-by: Ingo Molnar <mingo@xxxxxxx>

	Ingo
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