Re: [PATCH] ocfs2: Add i_size check for dir

[Matthew Wilcox]

On Tue, Aug 20, 2024 at 08:08:38PM +0800, Edward Adam Davis wrote:
> When the i_size of dir is too large, it will cause limit to overflow and
> be less than de_buf, ultimately resulting in last_de not being initialized
> and causing uaf issue.
>  
> +	if (i_size_read(dir) > OCFS2_MAX_BLOCKSIZE)
> +		return -EINVAL;

Surely directories can be more than one block in size?