 static bool f2fs_lookup_extent_tree(struct inode *inode, pgoff_t pgofs,
 							struct extent_info *ei)
 {
	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
	struct extent_tree *et = F2FS_I(inode)->extent_tree;
	struct extent_node *en;
	bool ret = false;

	f2fs_bug_on(sbi, !et);

	trace_f2fs_lookup_extent_tree_start(inode, pgofs);

	read_lock(&et->lock);

	if (et->largest.fofs <= pgofs &&
			et->largest.fofs + et->largest.len > pgofs) {
		*ei = et->largest;
		ret = true;
		stat_inc_largest_node_hit(sbi);
		goto out;
	}

	en = (struct extent_node *)__lookup_rb_tree(&et->root,
				(struct rb_entry *)et->cached_en, pgofs);
	if (!en)
		goto out;

	if (en == et->cached_en)
		stat_inc_cached_node_hit(sbi);
	else
		stat_inc_rbtree_node_hit(sbi);

	*ei = en->ei;
	spin_lock(&sbi->extent_lock);
	if (!list_empty(&en->list)) {
		list_move_tail(&en->list, &sbi->extent_list);
		et->cached_en = en;
	}
	spin_unlock(&sbi->extent_lock);
	ret = true;
out:
	stat_inc_total_hit(sbi);
	read_unlock(&et->lock);

	trace_f2fs_lookup_extent_tree_end(inode, pgofs, ei);
	return ret;
}

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.