linux-kernel - Re: [RFC 2/2] ima: Fix detection of read/write violations on stacked filesystems

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Date: Mon, 15 Apr 2024 06:47:12 -0400
From: Mimi Zohar <zohar@...ux.ibm.com>
To: Miklos Szeredi <miklos@...redi.hu>, Stefan Berger <stefanb@...ux.ibm.com>
Cc: Amir Goldstein <amir73il@...il.com>, linux-integrity@...r.kernel.org,
        linux-unionfs@...r.kernel.org, linux-kernel@...r.kernel.org,
        roberto.sassu@...wei.com, Christian Brauner <brauner@...nel.org>
Subject: Re: [RFC 2/2] ima: Fix detection of read/write violations on
 stacked filesystems

On Mon, 2024-04-15 at 10:09 +0200, Miklos Szeredi wrote:
> On Fri, 12 Apr 2024 at 21:09, Stefan Berger <stefanb@...ux.ibm.com> wrote:
> 
> > I was hoping that this would be sufficiently generic to work with
> > potential future stacked filesystems as well that would need to also
> > provide support for D_REAL_FILEDATA.
> 
> I also have very bad feelings from IMA digging in the internals of overlayfs.
> 
> We should strive to get rid of remaining d_real() instances, not add more.
> 
> On a related note, D_REAL_METADATA was apparently added for IMA
> (commit 11b3f8ae7081 ("fs: remove the inode argument to ->d_real()
> method")), but there's no current user.  What's up with this?


It's queued in 
https://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity.git/ next-
integrity branch and should be linux-next.

thanks,

Mimi