static void udf_open_lvid(struct super_block *sb)
{
	struct udf_sb_info *sbi = UDF_SB(sb);
	struct buffer_head *bh = sbi->s_lvid_bh;
	struct logicalVolIntegrityDesc *lvid;
	struct logicalVolIntegrityDescImpUse *lvidiu;

	if (!bh)
		return;

	mutex_lock(&sbi->s_alloc_mutex);
	lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
	lvidiu = udf_sb_lvidiu(sbi);

	lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
	lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
	udf_time_to_disk_stamp(&lvid->recordingDateAndTime,
				CURRENT_TIME);
	lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);

	lvid->descTag.descCRC = cpu_to_le16(
		crc_itu_t(0, (char *)lvid + sizeof(struct tag),
			le16_to_cpu(lvid->descTag.descCRCLength)));

	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
	mark_buffer_dirty(bh);
	sbi->s_lvid_dirty = 0;
	mutex_unlock(&sbi->s_alloc_mutex);
}

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.