static bool ldm_validate_privheads(struct parsed_partitions *state,
				   struct privhead *ph1)
{
	static const int off[3] = { OFF_PRIV1, OFF_PRIV2, OFF_PRIV3 };
	struct privhead *ph[3] = { ph1 };
	Sector sect;
	u8 *data;
	bool result = false;
	long num_sects;
	int i;

	BUG_ON (!state || !ph1);

	ph[1] = kmalloc (sizeof (*ph[1]), GFP_KERNEL);
	ph[2] = kmalloc (sizeof (*ph[2]), GFP_KERNEL);
	if (!ph[1] || !ph[2]) {
		ldm_crit ("Out of memory.");
		goto out;
	}

	/* off[1 & 2] are relative to ph[0]->config_start */
	ph[0]->config_start = 0;

	/* Read and parse privheads */
	for (i = 0; i < 3; i++) {
		data = read_part_sector(state, ph[0]->config_start + off[i],
					&sect);
		if (!data) {
			ldm_crit ("Disk read failed.");
			goto out;
		}
		result = ldm_parse_privhead (data, ph[i]);
		put_dev_sector (sect);
		if (!result) {
			ldm_error ("Cannot find PRIVHEAD %d.", i+1); /* Log again */
			if (i < 2)
				goto out;	/* Already logged */
			else
				break;	/* FIXME ignore for now, 3rd PH can fail on odd-sized disks */
		}
	}

	num_sects = state->bdev->bd_inode->i_size >> 9;

	if ((ph[0]->config_start > num_sects) ||
	   ((ph[0]->config_start + ph[0]->config_size) > num_sects)) {
		ldm_crit ("Database extends beyond the end of the disk.");
		goto out;
	}

	if ((ph[0]->logical_disk_start > ph[0]->config_start) ||
	   ((ph[0]->logical_disk_start + ph[0]->logical_disk_size)
		    > ph[0]->config_start)) {
		ldm_crit ("Disk and database overlap.");
		goto out;
	}

	if (!ldm_compare_privheads (ph[0], ph[1])) {
		ldm_crit ("Primary and backup PRIVHEADs don't match.");
		goto out;
	}
	/* FIXME ignore this for now
	if (!ldm_compare_privheads (ph[0], ph[2])) {
		ldm_crit ("Primary and backup PRIVHEADs don't match.");
		goto out;
	}*/
	ldm_debug ("Validated PRIVHEADs successfully.");
	result = true;
out:
	kfree (ph[1]);
	kfree (ph[2]);
	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.