static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
{
	int i;
	int nr_groups = bitmap->s_nr_groups;
	int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
						nr_groups);

	for (i = 0; i < nr_groups; i++)
		if (bitmap->s_block_bitmap[i])
			brelse(bitmap->s_block_bitmap[i]);

	if (size <= PAGE_SIZE)
		kfree(bitmap);
	else
		vfree(bitmap);
}

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.