qcacld-3.0: Fix invalid access in vendor cmd handler
While processing vendor command: GET_PREFERRED_FREQ_LIST respective
handler __wlan_hdd_cfg80211_get_preferred_freq_list() do not validate
pcl_len received from policy_mgr_get_pcl() which can be zero when
current regulatory domain is ETSI13 based, gindoor_channel_support=0
and etsi13_srd_chan_in_master_mode=0.
If pcl_len is zero then invalid index is computed in
wlan_hdd_populate_weigh_pcl() when trying to access
chan_weights->weight_list[pcl_len - 1].
To fix this, add zero length check for pcl_len before accessing
weight_list[plc_len - 1].
Change-Id: Ie8bf52fe289634efc104ca674d70fcd1beb6c304
CRs-Fixed: 2492630
1 file changed