static int brcmf_cfg80211_get_channel(struct wiphy *wiphy,
				      struct wireless_dev *wdev,
				      struct cfg80211_chan_def *chandef)
{
	struct brcmf_cfg80211_info *cfg = wiphy_to_cfg(wiphy);
	struct net_device *ndev = wdev->netdev;
	struct brcmf_if *ifp;
	struct brcmu_chan ch;
	enum nl80211_band band = 0;
	enum nl80211_chan_width width = 0;
	u32 chanspec;
	int freq, err;

	if (!ndev)
		return -ENODEV;
	ifp = netdev_priv(ndev);

	err = brcmf_fil_iovar_int_get(ifp, "chanspec", &chanspec);
	if (err) {
		brcmf_err("chanspec failed (%d)\n", err);
		return err;
	}

	ch.chspec = chanspec;
	cfg->d11inf.decchspec(&ch);

	switch (ch.band) {
	case BRCMU_CHAN_BAND_2G:
		band = NL80211_BAND_2GHZ;
		break;
	case BRCMU_CHAN_BAND_5G:
		band = NL80211_BAND_5GHZ;
		break;
	}

	switch (ch.bw) {
	case BRCMU_CHAN_BW_80:
		width = NL80211_CHAN_WIDTH_80;
		break;
	case BRCMU_CHAN_BW_40:
		width = NL80211_CHAN_WIDTH_40;
		break;
	case BRCMU_CHAN_BW_20:
		width = NL80211_CHAN_WIDTH_20;
		break;
	case BRCMU_CHAN_BW_80P80:
		width = NL80211_CHAN_WIDTH_80P80;
		break;
	case BRCMU_CHAN_BW_160:
		width = NL80211_CHAN_WIDTH_160;
		break;
	}

	freq = ieee80211_channel_to_frequency(ch.control_ch_num, band);
	chandef->chan = ieee80211_get_channel(wiphy, freq);
	chandef->width = width;
	chandef->center_freq1 = ieee80211_channel_to_frequency(ch.chnum, band);
	chandef->center_freq2 = 0;

	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.