qcacld-3.0: Avoid OOB read in dot11f_unpack_assoc_response

Avoid OOB read in dot11f_unpack_assoc_response API. Add check
for when nBuf == len to read another byte of pBufRemaining.

Change-Id: Iccdb0b268d16f4169b8b701ade6085d47897f785
CRs-Fixed: 3042293

core/mac/src/sys/legacy/src/utils/src/dot11f.c

@@ -335,7 +335,7 @@ static uint32_t get_container_ies_len(tpAniSirGlobal pCtx,
 	len += *(pBufRemaining+1);
 	pBufRemaining += len + 2;
 	len += 2;
-	while (len < nBuf) {
+	while (len + 1 < nBuf) {
 		pIe = find_ie_defn(pCtx, pBufRemaining, nBuf - len, IEs);
 		if (NULL == pIe)
 			break;