linux-ext4 - Re: Mount option "nouser_xattr" will be removed by 3.5

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:   Mon, 20 Nov 2017 21:51:25 -0500
From:   Theodore Ts'o <tytso@....edu>
To:     elanTea <elanTea@...iln.de>
Cc:     linux-ext4@...r.kernel.org
Subject: Re: Mount option "nouser_xattr" will be removed by 3.5

On Fri, Nov 17, 2017 at 04:55:22PM +0100, elanTea wrote:
> Hi
> please do not remove this option. I need a filesystem without the
> posibility to hide information and files from the User. You can remove
> the funktion of write user_xattr but not the posibility to switch it of.

Can you say more?  I don't understand why you believe that userspace
settable (and visible) extended attribute gives "the possibility to
hide informatoin and files from the user".

What is your use case and what are you trying to protect against?

And are you using Posix ACL's and/or SELinux?  If not, you could just
turn off the file system' extended attriute feature altogether.

     	     	  	  	   	    	    - Ted