#fixed code
                                private void populatePartitionMaps() {
        driveToPartitionMap.clear();
        partitionToLogicalDriveMap.clear();
        partitionMap.clear();
        // For Regexp matching DeviceIDs
        Matcher mAnt;
        Matcher mDep;

        // Map drives to partitions
        Map<String, List<Object>> partitionQueryMap = WmiUtil.selectObjectsFrom(null, "Win32_DiskDriveToDiskPartition",
                DISK_TO_PARTITION_STRINGS, null, DISK_TO_PARTITION_TYPES);
        for (int i = 0; i < partitionQueryMap.get(WmiProperty.ANTECEDENT.name()).size(); i++) {
            mAnt = DEVICE_ID.matcher((String) partitionQueryMap.get(WmiProperty.ANTECEDENT.name()).get(i));
            mDep = DEVICE_ID.matcher((String) partitionQueryMap.get(WmiProperty.DEPENDENT.name()).get(i));
            if (mAnt.matches() && mDep.matches()) {
                MapUtil.createNewListIfAbsent(driveToPartitionMap, mAnt.group(1).replaceAll("\\\\\\\\", "\\\\"))
                        .add(mDep.group(1));
            }
        }

        // Map partitions to logical disks
        partitionQueryMap = WmiUtil.selectObjectsFrom(null, "Win32_LogicalDiskToPartition",
                DISK_TO_PARTITION_STRINGS, null, DISK_TO_PARTITION_TYPES);
        for (int i = 0; i < partitionQueryMap.get(WmiProperty.ANTECEDENT.name()).size(); i++) {
            mAnt = DEVICE_ID.matcher((String) partitionQueryMap.get(WmiProperty.ANTECEDENT.name()).get(i));
            mDep = DEVICE_ID.matcher((String) partitionQueryMap.get(WmiProperty.DEPENDENT.name()).get(i));
            if (mAnt.matches() && mDep.matches()) {
                partitionToLogicalDriveMap.put(mAnt.group(1), mDep.group(1) + "\\");
            }
        }

        // Next, get all partitions and create objects
        final Map<String, List<Object>> hwPartitionQueryMap = WmiUtil.selectObjectsFrom(null, "Win32_DiskPartition",
                PARTITION_STRINGS, null, PARTITION_TYPES);
        for (int i = 0; i < hwPartitionQueryMap.get(WmiProperty.NAME.name()).size(); i++) {
            String deviceID = (String) hwPartitionQueryMap.get(WmiProperty.DEVICEID.name()).get(i);
            String logicalDrive = MapUtil.getOrDefault(partitionToLogicalDriveMap, deviceID, "");
            String uuid = "";
            if (!logicalDrive.isEmpty()) {
                // Get matching volume for UUID
                char[] volumeChr = new char[BUFSIZE];
                Kernel32.INSTANCE.GetVolumeNameForVolumeMountPoint(logicalDrive, volumeChr, BUFSIZE);
                uuid = ParseUtil.parseUuidOrDefault(new String(volumeChr).trim(), "");
            }
            partitionMap
                    .put(deviceID,
                            new HWPartition(
                                    (String) hwPartitionQueryMap
                                            .get(WmiProperty.NAME.name()).get(
                                                    i),
                                    (String) hwPartitionQueryMap.get(WmiProperty.TYPE.name()).get(i),
                                    (String) hwPartitionQueryMap.get(WmiProperty.DESCRIPTION.name()).get(i), uuid,
                                    (Long) hwPartitionQueryMap.get(WmiProperty.SIZE.name()).get(i),
                                    ((Long) hwPartitionQueryMap.get(WmiProperty.DISKINDEX.name()).get(i)).intValue(),
                                    ((Long) hwPartitionQueryMap.get(WmiProperty.INDEX.name()).get(i)).intValue(),
                                    logicalDrive));
        }
    }
#vulnerable code 
                                private void populatePartitionMaps() {
        driveToPartitionMap.clear();
        partitionToLogicalDriveMap.clear();
        partitionMap.clear();
        // For Regexp matching DeviceIDs
        Matcher mAnt;
        Matcher mDep;

        // Map drives to partitions
        Map<String, List<String>> partitionQueryMap = WmiUtil.selectStringsFrom(null, "Win32_DiskDriveToDiskPartition",
                DRIVE_TO_PARTITION_PROPERTIES, null);
        for (int i = 0; i < partitionQueryMap.get(ANTECEDENT_PROPERTY).size(); i++) {
            mAnt = DEVICE_ID.matcher(partitionQueryMap.get(ANTECEDENT_PROPERTY).get(i));
            mDep = DEVICE_ID.matcher(partitionQueryMap.get(DEPENDENT_PROPERTY).get(i));
            if (mAnt.matches() && mDep.matches()) {
                MapUtil.createNewListIfAbsent(driveToPartitionMap, mAnt.group(1).replaceAll("\\\\\\\\", "\\\\"))
                        .add(mDep.group(1));
            }
        }

        // Map partitions to logical disks
        partitionQueryMap = WmiUtil.selectStringsFrom(null, "Win32_LogicalDiskToPartition",
                LOGICAL_DISK_TO_PARTITION_PROPERTIES, null);
        for (int i = 0; i < partitionQueryMap.get(ANTECEDENT_PROPERTY).size(); i++) {
            mAnt = DEVICE_ID.matcher(partitionQueryMap.get(ANTECEDENT_PROPERTY).get(i));
            mDep = DEVICE_ID.matcher(partitionQueryMap.get(DEPENDENT_PROPERTY).get(i));
            if (mAnt.matches() && mDep.matches()) {
                partitionToLogicalDriveMap.put(mAnt.group(1), mDep.group(1) + "\\");
            }
        }

        // Next, get all partitions and create objects
        final Map<String, List<Object>> hwPartitionQueryMap = WmiUtil.selectObjectsFrom(null, "Win32_DiskPartition",
                PARTITION_PROPERTIES, null, PARTITION_TYPES);
        for (int i = 0; i < hwPartitionQueryMap.get(NAME_PROPERTY).size(); i++) {
            String deviceID = (String) hwPartitionQueryMap.get(DEVICE_ID_PROPERTY).get(i);
            String logicalDrive = MapUtil.getOrDefault(partitionToLogicalDriveMap, deviceID, "");
            String uuid = "";
            if (!logicalDrive.isEmpty()) {
                // Get matching volume for UUID
                char[] volumeChr = new char[BUFSIZE];
                Kernel32.INSTANCE.GetVolumeNameForVolumeMountPoint(logicalDrive, volumeChr, BUFSIZE);
                uuid = ParseUtil.parseUuidOrDefault(new String(volumeChr).trim(), "");
            }
            partitionMap.put(deviceID,
                    new HWPartition((String) hwPartitionQueryMap.get(NAME_PROPERTY).get(i),
                            (String) hwPartitionQueryMap.get(TYPE_PROPERTY).get(i),
                            (String) hwPartitionQueryMap.get(DESCRIPTION_PROPERTY).get(i), uuid,
                            ParseUtil.parseLongOrDefault((String) hwPartitionQueryMap.get(SIZE_PROPERTY).get(i), 0L),
                            ((Long) hwPartitionQueryMap.get(DISK_INDEX_PROPERTY).get(i)).intValue(),
                            ((Long) hwPartitionQueryMap.get(INDEX_PROPERTY).get(i)).intValue(), logicalDrive));
        }
    } 
                            #location 14 
                            #vulnerability type NULL_DEREFERENCE