brcmf_bss_roaming_done(struct brcmf_cfg80211_info *cfg,
		       struct net_device *ndev,
		       const struct brcmf_event_msg *e)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_cfg80211_profile *profile = &ifp->vif->profile;
	struct brcmf_cfg80211_connect_info *conn_info = cfg_to_conn(cfg);
	struct wiphy *wiphy = cfg_to_wiphy(cfg);
	struct ieee80211_channel *notify_channel = NULL;
	struct ieee80211_supported_band *band;
	struct brcmf_bss_info_le *bi;
	struct brcmu_chan ch;
	u32 freq;
	s32 err = 0;
	u8 *buf;

	brcmf_dbg(TRACE, "Enter\n");

	brcmf_get_assoc_ies(cfg, ifp);
	memcpy(profile->bssid, e->addr, ETH_ALEN);
	brcmf_update_bss_info(cfg, ifp);

	buf = kzalloc(WL_BSS_INFO_MAX, GFP_KERNEL);
	if (buf == NULL) {
		err = -ENOMEM;
		goto done;
	}

	/* data sent to dongle has to be little endian */
	*(__le32 *)buf = cpu_to_le32(WL_BSS_INFO_MAX);
	err = brcmf_fil_cmd_data_get(ifp, BRCMF_C_GET_BSS_INFO,
				     buf, WL_BSS_INFO_MAX);

	if (err)
		goto done;

	bi = (struct brcmf_bss_info_le *)(buf + 4);
	ch.chspec = le16_to_cpu(bi->chanspec);
	cfg->d11inf.decchspec(&ch);

	if (ch.band == BRCMU_CHAN_BAND_2G)
		band = wiphy->bands[NL80211_BAND_2GHZ];
	else
		band = wiphy->bands[NL80211_BAND_5GHZ];

	freq = ieee80211_channel_to_frequency(ch.control_ch_num, band->band);
	notify_channel = ieee80211_get_channel(wiphy, freq);

done:
	kfree(buf);
	cfg80211_roamed(ndev, notify_channel, (u8 *)profile->bssid,
			conn_info->req_ie, conn_info->req_ie_len,
			conn_info->resp_ie, conn_info->resp_ie_len, GFP_KERNEL);
	brcmf_dbg(CONN, "Report roaming result\n");

	set_bit(BRCMF_VIF_STATUS_CONNECTED, &ifp->vif->sme_state);
	brcmf_dbg(TRACE, "Exit\n");
	return err;
}

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.