1 files changed, 8 insertions, 0 deletions

diff --git a/kernel/time/alarmtimer.c b/kernel/time/alarmtimer.c
index 2b2e032b4eb4..ee2f4202d82a 100644
--- a/kernel/time/alarmtimer.c
+++ b/kernel/time/alarmtimer.c
@@ -660,6 +660,14 @@ static int alarm_timer_set(struct k_itimer *timr, int flags,
 
         /* start the timer */
         timr->it.alarm.interval = timespec64_to_ktime(new_setting->it_interval);
+
+        /*
+         * Rate limit to the tick as a hot fix to prevent DOS. Will be
+         * mopped up later.
+         */
+        if (timr->it.alarm.interval < TICK_NSEC)
+                timr->it.alarm.interval = TICK_NSEC;
+
         exp = timespec64_to_ktime(new_setting->it_value);
         /* Convert (if necessary) to absolute time */
         if (flags != TIMER_ABSTIME) {