static int brcmf_vif_change_validate(struct brcmf_cfg80211_info *cfg,
				     struct brcmf_cfg80211_vif *vif,
				     enum nl80211_iftype new_type)
{
	int iftype_num[NUM_NL80211_IFTYPES];
	struct brcmf_cfg80211_vif *pos;
	bool check_combos = false;
	int ret = 0;

	memset(&iftype_num[0], 0, sizeof(iftype_num));
	list_for_each_entry(pos, &cfg->vif_list, list)
		if (pos == vif) {
			iftype_num[new_type]++;
		} else {
			/* concurrent interfaces so need check combinations */
			check_combos = true;
			iftype_num[pos->wdev.iftype]++;
		}

	if (check_combos)
		ret = cfg80211_check_combinations(cfg->wiphy, 1, 0, iftype_num);

	return ret;
}

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.