int ping_init_sock(struct sock *sk)
{
	struct net *net = sock_net(sk);
	kgid_t group = current_egid();
	struct group_info *group_info;
	int i, j, count;
	kgid_t low, high;
	int ret = 0;

	if (sk->sk_family == AF_INET6)
		sk->sk_ipv6only = 1;

	inet_get_ping_group_range_net(net, &low, &high);
	if (gid_lte(low, group) && gid_lte(group, high))
		return 0;

	group_info = get_current_groups();
	count = group_info->ngroups;
	for (i = 0; i < group_info->nblocks; i++) {
		int cp_count = min_t(int, NGROUPS_PER_BLOCK, count);
		for (j = 0; j < cp_count; j++) {
			kgid_t gid = group_info->blocks[i][j];
			if (gid_lte(low, gid) && gid_lte(gid, high))
				goto out_release_group;
		}

		count -= cp_count;
	}

	ret = -EACCES;

out_release_group:
	put_group_info(group_info);
	return ret;
}

Unknown