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  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Mon, 19 Oct 2015 09:16:48 -0400
From:	Austin S Hemmelgarn <>
To:	Andreas Gruenbacher <>
Cc:	Alexander Viro <>,
	Theodore Ts'o <>,
	Andreas Dilger <>,
	"J. Bruce Fields" <>,
	Jeff Layton <>,
	Trond Myklebust <>,
	Anna Schumaker <>,
	Dave Chinner <>,
	linux-ext4 <>,,
	LKML <>,
	linux-fsdevel <>,
	Linux NFS Mailing List <>,, Linux API <>,
	"Aneesh Kumar K.V" <>
Subject: Re: [PATCH v11 21/48] ext4: Add richacl feature flag

On 2015-10-16 13:41, Andreas Gruenbacher wrote:
> On Fri, Oct 16, 2015 at 7:31 PM, Austin S Hemmelgarn
> <> wrote:
>> I would like to re-iterate, on both XFS and ext4, I _really_ think this
>> should be a ro_compat flag, and not an incompat one.  If a person has the
>> ability to mount the FS (even if it's a read-only mount), then they by
>> definition have read access to the file or partition that the filesystem is
>> contained in, which means that any ACL's stored on the filesystem are
>> functionally irrelevant,
> It is unfortunately not safe to make such a file system accessible to
> other users, so the feature is not strictly read-only compatible.
OK, seeing as I wasn't particularly clear as to why I object to this in 
my other e-mail, let's try this again.

Can you please explain exactly why it isn't safe to make such a 
filesystem accessible to other users?  Because that _really_ sounds to 
me like you are trying to rely on this being un-mountable on a kernel 
that doesn't support richacls to try and provide the illusion of better 

Download attachment "smime.p7s" of type "application/pkcs7-signature" (3019 bytes)

Powered by blists - more mailing lists