diff --git a/include/linux/time64.h b/include/linux/time64.h
index 980c71b3001a..2a45b8c87edb 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -188,6 +188,10 @@ static inline bool timespec64_valid_strict(const struct timespec64 *ts)
  */
 static inline s64 timespec64_to_ns(const struct timespec64 *ts)
 {
+	/* Prevent multiplication overflow */
+	if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
+		return KTIME_MAX;
+
 	return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
 }