brcmf_cfg80211_sched_scan_start(struct wiphy *wiphy,
				struct net_device *ndev,
				struct cfg80211_sched_scan_request *request)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_cfg80211_info *cfg = wiphy_priv(wiphy);
	struct brcmf_pno_net_param_le pfn;
	int i;
	int ret = 0;

	brcmf_dbg(SCAN, "Enter n_match_sets:%d n_ssids:%d\n",
		  request->n_match_sets, request->n_ssids);
	if (test_bit(BRCMF_SCAN_STATUS_BUSY, &cfg->scan_status)) {
		brcmf_err("Scanning already: status (%lu)\n", cfg->scan_status);
		return -EAGAIN;
	}
	if (test_bit(BRCMF_SCAN_STATUS_SUPPRESS, &cfg->scan_status)) {
		brcmf_err("Scanning suppressed: status (%lu)\n",
			  cfg->scan_status);
		return -EAGAIN;
	}

	if (!request->n_ssids || !request->n_match_sets) {
		brcmf_dbg(SCAN, "Invalid sched scan req!! n_ssids:%d\n",
			  request->n_ssids);
		return -EINVAL;
	}

	if (request->n_ssids > 0) {
		for (i = 0; i < request->n_ssids; i++) {
			/* Active scan req for ssids */
			brcmf_dbg(SCAN, ">>> Active scan req for ssid (%s)\n",
				  request->ssids[i].ssid);

			/* match_set ssids is a supert set of n_ssid list,
			 * so we need not add these set separately.
			 */
		}
	}

	if (request->n_match_sets > 0) {
		/* clean up everything */
		ret = brcmf_dev_pno_clean(ndev);
		if  (ret < 0) {
			brcmf_err("failed error=%d\n", ret);
			return ret;
		}

		/* configure pno */
		if (brcmf_dev_pno_config(ifp, request))
			return -EINVAL;

		/* configure each match set */
		for (i = 0; i < request->n_match_sets; i++) {
			struct cfg80211_ssid *ssid;
			u32 ssid_len;

			ssid = &request->match_sets[i].ssid;
			ssid_len = ssid->ssid_len;

			if (!ssid_len) {
				brcmf_err("skip broadcast ssid\n");
				continue;
			}
			pfn.auth = cpu_to_le32(WLAN_AUTH_OPEN);
			pfn.wpa_auth = cpu_to_le32(BRCMF_PNO_WPA_AUTH_ANY);
			pfn.wsec = cpu_to_le32(0);
			pfn.infra = cpu_to_le32(1);
			pfn.flags = cpu_to_le32(1 << BRCMF_PNO_HIDDEN_BIT);
			pfn.ssid.SSID_len = cpu_to_le32(ssid_len);
			memcpy(pfn.ssid.SSID, ssid->ssid, ssid_len);
			ret = brcmf_fil_iovar_data_set(ifp, "pfn_add", &pfn,
						       sizeof(pfn));
			brcmf_dbg(SCAN, ">>> PNO filter %s for ssid (%s)\n",
				  ret == 0 ? "set" : "failed", ssid->ssid);
		}
		/* Enable the PNO */
		if (brcmf_fil_iovar_int_set(ifp, "pfn", 1) < 0) {
			brcmf_err("PNO enable failed!! ret=%d\n", ret);
			return -EINVAL;
		}
	} else {
		return -EINVAL;
	}

	return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.