static int udf_fill_partdesc_info(struct super_block *sb,
		struct partitionDesc *p, int p_index)
{
	struct udf_part_map *map;
	struct udf_sb_info *sbi = UDF_SB(sb);
	struct partitionHeaderDesc *phd;

	map = &sbi->s_partmaps[p_index];

	map->s_partition_len = le32_to_cpu(p->partitionLength); /* blocks */
	map->s_partition_root = le32_to_cpu(p->partitionStartingLocation);

	if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_READ_ONLY))
		map->s_partition_flags |= UDF_PART_FLAG_READ_ONLY;
	if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_WRITE_ONCE))
		map->s_partition_flags |= UDF_PART_FLAG_WRITE_ONCE;
	if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_REWRITABLE))
		map->s_partition_flags |= UDF_PART_FLAG_REWRITABLE;
	if (p->accessType == cpu_to_le32(PD_ACCESS_TYPE_OVERWRITABLE))
		map->s_partition_flags |= UDF_PART_FLAG_OVERWRITABLE;

	udf_debug("Partition (%d type %x) starts at physical %d, block length %d\n",
		  p_index, map->s_partition_type,
		  map->s_partition_root, map->s_partition_len);

	if (strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR02) &&
	    strcmp(p->partitionContents.ident, PD_PARTITION_CONTENTS_NSR03))
		return 0;

	phd = (struct partitionHeaderDesc *)p->partitionContentsUse;
	if (phd->unallocSpaceTable.extLength) {
		struct kernel_lb_addr loc = {
			.logicalBlockNum = le32_to_cpu(
				phd->unallocSpaceTable.extPosition),
			.partitionReferenceNum = p_index,
		};

		map->s_uspace.s_table = udf_iget(sb, &loc);
		if (!map->s_uspace.s_table) {
			udf_debug("cannot load unallocSpaceTable (part %d)\n",
				  p_index);
			return 1;
		}
		map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_TABLE;
		udf_debug("unallocSpaceTable (part %d) @ %ld\n",
			  p_index, map->s_uspace.s_table->i_ino);
	}

	if (phd->unallocSpaceBitmap.extLength) {
		struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
		if (!bitmap)
			return 1;
		map->s_uspace.s_bitmap = bitmap;
		bitmap->s_extLength = le32_to_cpu(
				phd->unallocSpaceBitmap.extLength);
		bitmap->s_extPosition = le32_to_cpu(
				phd->unallocSpaceBitmap.extPosition);
		map->s_partition_flags |= UDF_PART_FLAG_UNALLOC_BITMAP;
		udf_debug("unallocSpaceBitmap (part %d) @ %d\n",
			  p_index, bitmap->s_extPosition);
	}

	if (phd->partitionIntegrityTable.extLength)
		udf_debug("partitionIntegrityTable (part %d)\n", p_index);

	if (phd->freedSpaceTable.extLength) {
		struct kernel_lb_addr loc = {
			.logicalBlockNum = le32_to_cpu(
				phd->freedSpaceTable.extPosition),
			.partitionReferenceNum = p_index,
		};

		map->s_fspace.s_table = udf_iget(sb, &loc);
		if (!map->s_fspace.s_table) {
			udf_debug("cannot load freedSpaceTable (part %d)\n",
				  p_index);
			return 1;
		}

		map->s_partition_flags |= UDF_PART_FLAG_FREED_TABLE;
		udf_debug("freedSpaceTable (part %d) @ %ld\n",
			  p_index, map->s_fspace.s_table->i_ino);
	}

	if (phd->freedSpaceBitmap.extLength) {
		struct udf_bitmap *bitmap = udf_sb_alloc_bitmap(sb, p_index);
		if (!bitmap)
			return 1;
		map->s_fspace.s_bitmap = bitmap;
		bitmap->s_extLength = le32_to_cpu(
				phd->freedSpaceBitmap.extLength);
		bitmap->s_extPosition = le32_to_cpu(
				phd->freedSpaceBitmap.extPosition);
		map->s_partition_flags |= UDF_PART_FLAG_FREED_BITMAP;
		udf_debug("freedSpaceBitmap (part %d) @ %d\n",
			  p_index, bitmap->s_extPosition);
	}
	return 0;
}

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.