brcmf_cfg80211_dump_station(struct wiphy *wiphy, struct net_device *ndev,
			    int idx, u8 *mac, struct station_info *sinfo)
{
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
	struct brcmf_if *ifp = netdev_priv(ndev);
	s32 err;

	brcmf_dbg(TRACE, "Enter, idx %d\n", idx);

	if (idx == 0) {
		cfg->assoclist.count = cpu_to_le32(BRCMF_MAX_ASSOCLIST);
		err = brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_ASSOCLIST,
					     &cfg->assoclist,
					     sizeof(cfg->assoclist));
		if (err) {
			brcmf_err("BRCMF_C_GET_ASSOCLIST unsupported, err=%d\n",
				  err);
			cfg->assoclist.count = 0;
			return -EOPNOTSUPP;
		}
	}
	if (idx < le32_to_cpu(cfg->assoclist.count)) {
		memcpy(mac, cfg->assoclist.mac[idx], ETH_ALEN);
		return brcmf_cfg80211_get_station(wiphy, ndev, mac, sinfo);
	}
	return -ENOENT;
}

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.