static unsigned int udf_count_free(struct super_block *sb)
{
	unsigned int accum = 0;
	struct udf_sb_info *sbi;
	struct udf_part_map *map;

	sbi = UDF_SB(sb);
	if (sbi->s_lvid_bh) {
		struct logicalVolIntegrityDesc *lvid =
			(struct logicalVolIntegrityDesc *)
			sbi->s_lvid_bh->b_data;
		if (le32_to_cpu(lvid->numOfPartitions) > sbi->s_partition) {
			accum = le32_to_cpu(
					lvid->freeSpaceTable[sbi->s_partition]);
			if (accum == 0xFFFFFFFF)
				accum = 0;
		}
	}

	if (accum)
		return accum;

	map = &sbi->s_partmaps[sbi->s_partition];
	if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_BITMAP) {
		accum += udf_count_free_bitmap(sb,
					       map->s_uspace.s_bitmap);
	}
	if (map->s_partition_flags & UDF_PART_FLAG_FREED_BITMAP) {
		accum += udf_count_free_bitmap(sb,
					       map->s_fspace.s_bitmap);
	}
	if (accum)
		return accum;

	if (map->s_partition_flags & UDF_PART_FLAG_UNALLOC_TABLE) {
		accum += udf_count_free_table(sb,
					      map->s_uspace.s_table);
	}
	if (map->s_partition_flags & UDF_PART_FLAG_FREED_TABLE) {
		accum += udf_count_free_table(sb,
					      map->s_fspace.s_table);
	}

	return accum;
}

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.