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

Roberto Sassu
2024-06-20T09:16:55Z

On Thu, 2024-06-20 at 11:12 +0200, Roberto Sassu 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

If other kernel subsystems require the same functionality,

Roberto

> can make it as an independent subsystem.
>
> Starting from IMA means that we are mixing two different things in the
> inode security blob, and I'm not sure that it is more straightforward
> than making the digest_cache LSM require the space it needs and be
> notified about security events.
>
> Thanks
>
> Roberto
>