linux-kernel - Re: [PATCH v7 0/6] evm: Do HMAC of multiple per LSM xattrs for new inodes

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Date:   Thu, 09 Mar 2023 08:53:48 +0100
From:   Roberto Sassu <roberto.sassu@...weicloud.com>
To:     Paul Moore <paul@...l-moore.com>
Cc:     mark@...heh.com, jlbec@...lplan.org, joseph.qi@...ux.alibaba.com,
        zohar@...ux.ibm.com, dmitry.kasatkin@...il.com, jmorris@...ei.org,
        serge@...lyn.com, stephen.smalley.work@...il.com,
        eparis@...isplace.org, casey@...aufler-ca.com,
        ocfs2-devel@....oracle.com, reiserfs-devel@...r.kernel.org,
        linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, selinux@...r.kernel.org,
        linux-kernel@...r.kernel.org, keescook@...omium.org,
        nicolas.bouchinet@...p-os.org,
        Roberto Sassu <roberto.sassu@...wei.com>
Subject: Re: [PATCH v7 0/6] evm: Do HMAC of multiple per LSM xattrs for new
 inodes

On Wed, 2023-03-08 at 17:16 -0500, Paul Moore wrote:
> On Thu, Dec 1, 2022 at 5:42 AM Roberto Sassu
> <roberto.sassu@...weicloud.com> wrote:
> > From: Roberto Sassu <roberto.sassu@...wei.com>
> > 
> > One of the major goals of LSM stacking is to run multiple LSMs side by side
> > without interfering with each other. The ultimate decision will depend on
> > individual LSM decision.
> > 
> > Several changes need to be made to the LSM infrastructure to be able to
> > support that. This patch set tackles one of them: gives to each LSM the
> > ability to specify one or multiple xattrs to be set at inode creation
> > time and, at the same time, gives to EVM the ability to access all those
> > xattrs and calculate the HMAC on them.
> 
> Hi Roberto,
> 
> The v7 draft of this patchset had some good discussion, and based on a
> quick read of the comments it looks like everyone was eventually
> satisfied that the v7 draft was good and no further changes were
> necessary, is that correct or do you have an updated draft of this
> patchset?

Hi Paul

I addressed few more concerns from Mimi and Casey. I think v8 should be
good to send (unless you have more comments/suggestions).

Thanks

Roberto