Re: [PATCH v4 00/14] security: digest_cache LSM

Paul Moore
2024-06-20T14:48:48Z

On Thu, Jun 20, 2024 at 5:12 AM Roberto Sassu
<roberto.sassu@huaweicloud.com> wrote:
> On Wed, 2024-06-19 at 14:43 -0400, Paul Moore wrote:
> > On Wed, Jun 19, 2024 at 12:38 PM Roberto Sassu
> > <roberto.sassu@huaweicloud.com> wrote:
> > >
> > > Making it a kernel subsystem would likely mean replicating what the LSM
> > > infrastructure is doing, inode (security) blob and being notified about
> > > file/directory changes.
> >
> > Just because the LSM framework can be used for something, perhaps it
> > even makes the implementation easier, it doesn't mean the framework
> > should be used for everything.
>
> It is supporting 3 LSMs: IMA, IPE and BPF LSM.
>
> That makes it a clear target for the security subsystem, and as you
> suggested to start for IMA, if other kernel subsystems require them, we
> can make it as an independent subsystem.

Have you discussed the file digest cache functionality with either the
IPE or BPF LSM maintainers? While digest_cache may support these
LSMs, I don't recall seeing any comments from the other LSM
developers; if you are going to advocate for this as something outside
of IMA, it would be good to see a show of support for the other LSMs.

--
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