qcacld-3.0: Prevent overread of SSID in hdd_fill_pmksa_info()

Currently when transferring SSID information from the nl80211 TLV to
the internal data structure hdd_fill_pmksa_info() always copies
SIR_MAC_MAX_SSID_LENGTH bytes which can overread the buffer. In order
to prevent overread only copy as many bytes as the TLV contains.

Note that the destination buffer passed to hdd_fill_pmksa_info() is
always zero-filled so no additional zeroing of bytes is required.

Change-Id: I1f6773b70e9e728d6b1ce93ca26417348e96844c
CRs-Fixed: 2237462

core/hdd/src/wlan_hdd_cfg80211.c

@@ -20837,8 +20837,7 @@ static void hdd_fill_pmksa_info(tPmkidCacheInfo *pmk_cache,
 		qdf_mem_copy(pmk_cache->BSSID.bytes,
 			     pmksa->bssid, QDF_MAC_ADDR_SIZE);
 	} else {
-		qdf_mem_copy(pmk_cache->ssid, pmksa->ssid,
-			     SIR_MAC_MAX_SSID_LENGTH);
+		qdf_mem_copy(pmk_cache->ssid, pmksa->ssid, pmksa->ssid_len);
 		qdf_mem_copy(pmk_cache->cache_id, pmksa->cache_id,
 			     CACHE_ID_LEN);
 		pmk_cache->ssid_len = pmksa->ssid_len;