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

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Message-ID: <CAJfpegsHJ1JsM3SxNk5gnUM+aucqOqNm3RTrsYgePkcQYR4EEw@mail.gmail.com>
Date: Tue, 16 Apr 2024 10:05:54 +0200
From: Miklos Szeredi <miklos@...redi.hu>
To: Mimi Zohar <zohar@...ux.ibm.com>
Cc: Stefan Berger <stefanb@...ux.ibm.com>, 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, 15 Apr 2024 at 20:35, Mimi Zohar <zohar@...ux.ibm.com> wrote:

> Although "Changes to the underlying filesystems while part of a mounted overlay
> filesystem are not allowed.", from an integrity perspective these changes might
> affect overlay files.  So they need to be detected and possibly re-measured, re-
> appraised, and/or re-audited [1, 2].

How are changes of non-overlay files detected?

Thanks,
Miklos