static bool ldm_get_vblks(struct parsed_partitions *state, unsigned long base,
			  struct ldmdb *ldb)
{
	int size, perbuf, skip, finish, s, v, recs;
	u8 *data = NULL;
	Sector sect;
	bool result = false;
	LIST_HEAD (frags);

	BUG_ON(!state || !ldb);

	size   = ldb->vm.vblk_size;
	perbuf = 512 / size;
	skip   = ldb->vm.vblk_offset >> 9;		/* Bytes to sectors */
	finish = (size * ldb->vm.last_vblk_seq) >> 9;

	for (s = skip; s < finish; s++) {		/* For each sector */
		data = read_part_sector(state, base + OFF_VMDB + s, &sect);
		if (!data) {
			ldm_crit ("Disk read failed.");
			goto out;
		}

		for (v = 0; v < perbuf; v++, data+=size) {  /* For each vblk */
			if (MAGIC_VBLK != get_unaligned_be32(data)) {
				ldm_error ("Expected to find a VBLK.");
				goto out;
			}

			recs = get_unaligned_be16(data + 0x0E);	/* Number of records */
			if (recs == 1) {
				if (!ldm_ldmdb_add (data, size, ldb))
					goto out;	/* Already logged */
			} else if (recs > 1) {
				if (!ldm_frag_add (data, size, &frags))
					goto out;	/* Already logged */
			}
			/* else Record is not in use, ignore it. */
		}
		put_dev_sector (sect);
		data = NULL;
	}

	result = ldm_frag_commit (&frags, ldb);	/* Failures, already logged */
out:
	if (data)
		put_dev_sector (sect);
	ldm_frag_free (&frags);

	return result;
}

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.