void f2fs_destroy_extent_tree(struct inode *inode)
{
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct extent_tree *et = F2FS_I(inode)->extent_tree;
	unsigned int node_cnt = 0;

	if (!et)
		return;

	if (inode->i_nlink && !is_bad_inode(inode) &&
					atomic_read(&et->node_cnt)) {
		mutex_lock(&sbi->extent_tree_lock);
		list_add_tail(&et->list, &sbi->zombie_list);
		atomic_inc(&sbi->total_zombie_tree);
		mutex_unlock(&sbi->extent_tree_lock);
		return;
	}

	/* free all extent info belong to this extent tree */
	node_cnt = f2fs_destroy_extent_node(inode);

	/* delete extent tree entry in radix tree */
	mutex_lock(&sbi->extent_tree_lock);
	f2fs_bug_on(sbi, atomic_read(&et->node_cnt));
	radix_tree_delete(&sbi->extent_tree_root, inode->i_ino);
	kmem_cache_free(extent_tree_slab, et);
	atomic_dec(&sbi->total_ext_tree);
	mutex_unlock(&sbi->extent_tree_lock);

	F2FS_I(inode)->extent_tree = NULL;

	trace_f2fs_destroy_extent_tree(inode, node_cnt);
}

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.