static int udf_load_sequence(struct super_block *sb, struct buffer_head *bh,
			     struct kernel_lb_addr *fileset)
{
	struct anchorVolDescPtr *anchor;
	long main_s, main_e, reserve_s, reserve_e;

	anchor = (struct anchorVolDescPtr *)bh->b_data;

	/* Locate the main sequence */
	main_s = le32_to_cpu(anchor->mainVolDescSeqExt.extLocation);
	main_e = le32_to_cpu(anchor->mainVolDescSeqExt.extLength);
	main_e = main_e >> sb->s_blocksize_bits;
	main_e += main_s;

	/* Locate the reserve sequence */
	reserve_s = le32_to_cpu(anchor->reserveVolDescSeqExt.extLocation);
	reserve_e = le32_to_cpu(anchor->reserveVolDescSeqExt.extLength);
	reserve_e = reserve_e >> sb->s_blocksize_bits;
	reserve_e += reserve_s;

	/* Process the main & reserve sequences */
	/* responsible for finding the PartitionDesc(s) */
	if (!udf_process_sequence(sb, main_s, main_e, fileset))
		return 1;
	return !udf_process_sequence(sb, reserve_s, reserve_e, fileset);
}

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.