The RTC hrtimer is self rearming. We really need to limit the frequency to something sensible. Signed-off-by: Thomas Gleixner Cc: stable@kernel.org --- drivers/rtc/interface.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) Index: linux-2.6/drivers/rtc/interface.c =================================================================== --- linux-2.6.orig/drivers/rtc/interface.c +++ linux-2.6/drivers/rtc/interface.c @@ -708,7 +708,7 @@ int rtc_irq_set_freq(struct rtc_device * int err = 0; unsigned long flags; - if (freq <= 0) + if (freq <= 0 || freq > 5000) return -EINVAL; retry: spin_lock_irqsave(&rtc->irq_task_lock, flags);