static void brcmf_link_down(struct brcmf_cfg80211_vif *vif, u16 reason)
{
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(vif->wdev.wiphy);
	s32 err = 0;

	brcmf_dbg(TRACE, "Enter\n");

	if (test_and_clear_bit(BRCMF_VIF_STATUS_CONNECTED, &vif->sme_state)) {
		brcmf_dbg(INFO, "Call WLC_DISASSOC to stop excess roaming\n ");
		err = brcmf_fil_cmd_data_set(vif->ifp,
					     BRCMF_C_DISASSOC, NULL, 0);
		if (err) {
			brcmf_err("WLC_DISASSOC failed (%d)\n", err);
		}
		if ((vif->wdev.iftype == NL80211_IFTYPE_STATION) ||
		    (vif->wdev.iftype == NL80211_IFTYPE_P2P_CLIENT))
			cfg80211_disconnected(vif->wdev.netdev, reason, NULL, 0,
					      true, GFP_KERNEL);
	}
	clear_bit(BRCMF_VIF_STATUS_CONNECTING, &vif->sme_state);
	clear_bit(BRCMF_SCAN_STATUS_SUPPRESS, &cfg->scan_status);
	brcmf_btcoex_set_mode(vif, BRCMF_BTCOEX_ENABLED, 0);
	brcmf_dbg(TRACE, "Exit\n");
}

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.