static void tcp_snd_una_update(struct tcp_sock *tp, u32 ack)
{
	u32 delta = ack - tp->snd_una;

	u64_stats_update_begin(&tp->syncp);
	tp->bytes_acked += delta;
	u64_stats_update_end(&tp->syncp);
	tp->snd_una = ack;
}

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