void set_normalized_timespec(struct timespec *ts, time_t sec, long nsec)
{
	while (nsec >= NSEC_PER_SEC) {
		nsec -= NSEC_PER_SEC;
		++sec;
	}
	while (nsec < 0) {
		nsec += NSEC_PER_SEC;
		--sec;
	}
	ts->tv_sec = sec;
	ts->tv_nsec = nsec;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.