static void tcp_illinois_info(struct sock *sk, u32 ext,
			      struct sk_buff *skb)
{
	const struct illinois *ca = inet_csk_ca(sk);

	if (ext & (1 << (INET_DIAG_VEGASINFO - 1))) {
		struct tcpvegas_info info = {
			.tcpv_enabled = 1,
 			.tcpv_rttcnt = ca->cnt_rtt,
 			.tcpv_minrtt = ca->base_rtt,
 		};
		u64 t = ca->sum_rtt;
 
		do_div(t, ca->cnt_rtt);
		info.tcpv_rtt = t;
 
 		nla_put(skb, INET_DIAG_VEGASINFO, sizeof(info), &info);
 	}
 }

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