diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index 0682bb340221..d252d018bfe7 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -83,6 +83,9 @@ static int ptp_clock_settime(struct posix_clock *pc, const struct timespec64 *tp
 		return -EBUSY;
 	}
 
+	if (!timespec64_valid_settod(tp))
+		return -EINVAL;
+
 	return  ptp->info->settime64(ptp->info, tp);
 }
 
@@ -113,7 +116,7 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
 	ops = ptp->info;
 
 	if (tx->modes & ADJ_SETOFFSET) {
-		struct timespec64 ts;
+		struct timespec64 ts, ts2;
 		ktime_t kt;
 		s64 delta;
 
@@ -126,6 +129,14 @@ static int ptp_clock_adjtime(struct posix_clock *pc, struct __kernel_timex *tx)
 		if ((unsigned long) ts.tv_nsec >= NSEC_PER_SEC)
 			return -EINVAL;
 
+		/* Make sure the offset is valid */
+		err = ptp_clock_gettime(pc, &ts2);
+		if (err)
+			return err;
+		ts2 = timespec64_add(ts2, ts);
+		if (!timespec64_valid_settod(&ts2))
+			return -EINVAL;
+
 		kt = timespec64_to_ktime(ts);
 		delta = ktime_to_ns(kt);
 		err = ops->adjtime(ops, delta);