brcmf_cfg80211_del_key(struct wiphy *wiphy, struct net_device *ndev,
		       u8 key_idx, bool pairwise, const u8 *mac_addr)
{
	struct brcmf_if *ifp = netdev_priv(ndev);
	struct brcmf_wsec_key *key;
	s32 err;

	brcmf_dbg(TRACE, "Enter\n");
	brcmf_dbg(CONN, "key index (%d)\n", key_idx);

	if (!check_vif_up(ifp->vif))
		return -EIO;

	if (key_idx >= BRCMF_MAX_DEFAULT_KEYS) {
		/* we ignore this key index in this case */
		return -EINVAL;
	}

	key = &ifp->vif->profile.key[key_idx];

	if (key->algo == CRYPTO_ALGO_OFF) {
		brcmf_dbg(CONN, "Ignore clearing of (never configured) key\n");
		return -EINVAL;
	}

	memset(key, 0, sizeof(*key));
	key->index = (u32)key_idx;
	key->flags = BRCMF_PRIMARY_KEY;

	/* Clear the key/index */
	err = send_key_to_dongle(ifp, key);

	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.