static int hwsim_new_radio_nl(struct sk_buff *msg, struct genl_info *info)
{
	struct hwsim_new_radio_params param = { 0 };
	const char *hwname = NULL;
	int ret;

	param.reg_strict = info->attrs[HWSIM_ATTR_REG_STRICT_REG];
	param.p2p_device = info->attrs[HWSIM_ATTR_SUPPORT_P2P_DEVICE];
	param.channels = channels;
	param.destroy_on_close =
		info->attrs[HWSIM_ATTR_DESTROY_RADIO_ON_CLOSE];

	if (info->attrs[HWSIM_ATTR_CHANNELS])
		param.channels = nla_get_u32(info->attrs[HWSIM_ATTR_CHANNELS]);

	if (info->attrs[HWSIM_ATTR_NO_VIF])
		param.no_vif = true;

	if (info->attrs[HWSIM_ATTR_RADIO_NAME]) {
		hwname = kasprintf(GFP_KERNEL, "%.*s",
				   nla_len(info->attrs[HWSIM_ATTR_RADIO_NAME]),
				   (char *)nla_data(info->attrs[HWSIM_ATTR_RADIO_NAME]));
		if (!hwname)
			return -ENOMEM;
		param.hwname = hwname;
	}

	if (info->attrs[HWSIM_ATTR_USE_CHANCTX])
		param.use_chanctx = true;
	else
		param.use_chanctx = (param.channels > 1);

	if (info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2])
		param.reg_alpha2 =
			nla_data(info->attrs[HWSIM_ATTR_REG_HINT_ALPHA2]);

	if (info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]) {
		u32 idx = nla_get_u32(info->attrs[HWSIM_ATTR_REG_CUSTOM_REG]);

		if (idx >= ARRAY_SIZE(hwsim_world_regdom_custom))
			return -EINVAL;
		param.regd = hwsim_world_regdom_custom[idx];
	}

	ret = mac80211_hwsim_new_radio(info, &param);
	kfree(hwname);
	return ret;
}
The software does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.