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-rw-r--r--kernel/time/alarmtimer.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 0e9263f6fd09..ea5e1a928d5b 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -481,6 +481,15 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
if (!rtcdev)
return -ENOTSUPP;
+ /*
+ * XXX HACK! Currently we can DOS a system if the interval
+ * period on alarmtimers is too small. Cap the interval here
+ * to 100us and solve this properly in a future patch! -jstultz
+ */
+ if ((new_setting->it_interval.tv_sec == 0) &&
+ (new_setting->it_interval.tv_nsec < 100000))
+ new_setting->it_interval.tv_nsec = 100000;
+
if (old_setting)
alarm_timer_get(timr, old_setting);
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