# Re: \[PATCH v18 00/22\] Richacls (Core and Ext4)

- From: Christoph Hellwig \<hch@infradead.org\>
- Date: 2016-03-15 07:14:39 
- List: linux-ext4
- Page: https://ratatoskr.run/linux-ext4/2016/03/105753
- Thread: https://ratatoskr.run/linux-nfs/2016/02/104174/t.md

```text
On Fri, Mar 11, 2016 at 02:05:16PM -0600, Steve French wrote:
> A loosely related question is what can be done for tools around existing
> interfaces for ACLs.  I recently found out NTFS-3g has this xattr:
> 
>     static const char nf_ns_xattr_ntfs_acl[] = "system.ntfs_acl";
> 
> which allows you to query system.ntfs_acl xattr to get their full ACL

Bah.  Filesystems really have no business exposing random system xattrs,
and we really need to add a filter to fs/xattr.c to not expose
arbitrary attrs ouside the user.* prefix.

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