static unsigned int udf_count_free_table(struct super_block *sb,
					 struct inode *table)
{
	unsigned int accum = 0;
	uint32_t elen;
	struct kernel_lb_addr eloc;
	int8_t etype;
	struct extent_position epos;

	mutex_lock(&UDF_SB(sb)->s_alloc_mutex);
	epos.block = UDF_I(table)->i_location;
	epos.offset = sizeof(struct unallocSpaceEntry);
	epos.bh = NULL;

	while ((etype = udf_next_aext(table, &epos, &eloc, &elen, 1)) != -1)
		accum += (elen >> table->i_sb->s_blocksize_bits);

	brelse(epos.bh);
	mutex_unlock(&UDF_SB(sb)->s_alloc_mutex);

	return accum;
}

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.