linux-kernel - Re: [PATCH v4 00/14] security: digest

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Date: Tue, 16 Apr 2024 08:56:32 +0200
From: Roberto Sassu <roberto.sassu@...weicloud.com>
To: Jarkko Sakkinen <jarkko@...nel.org>, corbet@....net,
 paul@...l-moore.com,  jmorris@...ei.org, serge@...lyn.com,
 akpm@...ux-foundation.org, shuah@...nel.org,  mcoquelin.stm32@...il.com,
 alexandre.torgue@...s.st.com, mic@...ikod.net
Cc: linux-security-module@...r.kernel.org, linux-doc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org, 
 bpf@...r.kernel.org, zohar@...ux.ibm.com, dmitry.kasatkin@...il.com, 
 linux-integrity@...r.kernel.org, wufan@...ux.microsoft.com,
 pbrobinson@...il.com,  zbyszek@...waw.pl, hch@....de, mjg59@...f.ucam.org,
 pmatilai@...hat.com,  jannh@...gle.com, dhowells@...hat.com,
 jikos@...nel.org, mkoutny@...e.com,  ppavlu@...e.com, petr.vorel@...il.com,
 mzerqung@...inter.de, kgold@...ux.ibm.com,  Roberto Sassu
 <roberto.sassu@...wei.com>
Subject: Re: [PATCH v4 00/14] security: digest_cache LSM

On Mon, 2024-04-15 at 22:18 +0300, Jarkko Sakkinen wrote:
> On Mon Apr 15, 2024 at 5:24 PM EEST, Roberto Sassu wrote:
> > From: Roberto Sassu <roberto.sassu@...wei.com>
> > 
> > Integrity detection and protection has long been a desirable feature, to
> > reach a large user base and mitigate the risk of flaws in the software
> > and attacks.
> > 
> > However, while solutions exist, they struggle to reach the large user
> > base, due to requiring higher than desired constraints on performance,
> > flexibility and configurability, that only security conscious people are
> > willing to accept.
> > 
> > This is where the new digest_cache LSM comes into play, it offers
> > additional support for new and existing integrity solutions, to make
> > them faster and easier to deploy.
> 
> Sorry for nitpicking but what are the existing integrity solutions, 
> and how does it help with this struggle? I.e. what is the gist here?

No worries... please have a look at patch 14. It should have all the
information.

Thanks

Roberto