static int add_location(struct loc_track *t, struct kmem_cache *s,
				const struct track *track)
{
	long start, end, pos;
	struct location *l;
	void *caddr;
	unsigned long age = jiffies - track->when;

	start = -1;
	end = t->count;

	for ( ; ; ) {
		pos = start + (end - start + 1) / 2;

		/*
		 * There is nothing at "end". If we end up there
		 * we need to add something to before end.
		 */
		if (pos == end)
			break;

		caddr = t->loc[pos].addr;
		if (track->addr == caddr) {

			l = &t->loc[pos];
			l->count++;
			if (track->when) {
				l->sum_time += age;
				if (age < l->min_time)
					l->min_time = age;
				if (age > l->max_time)
					l->max_time = age;

				if (track->pid < l->min_pid)
					l->min_pid = track->pid;
				if (track->pid > l->max_pid)
					l->max_pid = track->pid;

				cpu_set(track->cpu, l->cpus);
			}
			node_set(page_to_nid(virt_to_page(track)), l->nodes);
			return 1;
		}

		if (track->addr < caddr)
			end = pos;
		else
			start = pos;
	}

	/*
	 * Not found. Insert new tracking element.
	 */
	if (t->count >= t->max && !alloc_loc_track(t, 2 * t->max, GFP_ATOMIC))
		return 0;

	l = t->loc + pos;
	if (pos < t->count)
		memmove(l + 1, l,
			(t->count - pos) * sizeof(struct location));
	t->count++;
	l->count = 1;
	l->addr = track->addr;
	l->sum_time = age;
	l->min_time = age;
	l->max_time = age;
	l->min_pid = track->pid;
	l->max_pid = track->pid;
	cpus_clear(l->cpus);
	cpu_set(track->cpu, l->cpus);
	nodes_clear(l->nodes);
	node_set(page_to_nid(virt_to_page(track)), l->nodes);
	return 1;
}

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