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

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Message-Id: <D0KXSLRDNSGJ.2EIFU7NWC20DI@kernel.org>
Date: Mon, 15 Apr 2024 22:18:07 +0300
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Roberto Sassu" <roberto.sassu@...weicloud.com>, <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 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?

BR, Jarkko