linux-kernel - Re: [PATCH v2] security: Restore passing final prot to ima_file

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Date:   Sun, 22 Jan 2023 15:29:54 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Roberto Sassu <roberto.sassu@...weicloud.com>,
        Paul Moore <paul@...l-moore.com>
Cc:     jmorris@...ei.org, serge@...lyn.com,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org,
        linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk,
        Roberto Sassu <roberto.sassu@...wei.com>,
        stable@...r.kernel.org
Subject: Re: [PATCH v2] security: Restore passing final prot to
 ima_file_mmap()

On Fri, 2023-01-13 at 11:52 +0100, Roberto Sassu wrote:

> > > If we add a new policy keyword, existing policies would not be updated
> > > unless the system administrator notices it. If a remote attestation
> > > fails, the administrator has to look into it.
> > 
> > Verifying the measurement list against a TPM quote should work
> > regardless of additional measurements.  The attestation server,
> > however, should also check for unknown files.
> > 
> > > Maybe we can introduce a new hook called MMAP_CHECK_REQ, so that an
> > > administrator could change the policy to have the current behavior, if
> > > the administrator wishes so.

<snip>

> > However "_REQ" could mean either requested or required.
> 
> It was to recall reqprot. I could rename to MMAP_CHECK_REQPROT.

That sounds good.

-- 
thanks,

Mimib