linux-kernel - Re: [PATCH v39 01/42] integrity: disassociate ima_filter_rule from security_audit

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Message-ID: <CAHC9VhS8mC0NC=-gbK_xBq2Ry6Be76ARZSg9Zm3y0bsocGEtTQ@mail.gmail.com>
Date: Mon, 24 Jun 2024 18:03:08 -0400
From: Paul Moore <paul@...l-moore.com>
To: Mimi Zohar <zohar@...ux.ibm.com>
Cc: Roberto Sassu <roberto.sassu@...weicloud.com>, Roberto Sassu <roberto.sassu@...wei.com>, 
	linux-security-module@...r.kernel.org, jmorris@...ei.org, serge@...lyn.com, 
	keescook@...omium.org, john.johansen@...onical.com, 
	penguin-kernel@...ove.sakura.ne.jp, stephen.smalley.work@...il.com, 
	linux-kernel@...r.kernel.org, mic@...ikod.net, 
	linux-integrity@...r.kernel.org, Casey Schaufler <casey@...aufler-ca.com>
Subject: Re: [PATCH v39 01/42] integrity: disassociate ima_filter_rule from security_audit_rule

On Mon, Jun 24, 2024 at 9:57 AM Mimi Zohar <zohar@...ux.ibm.com> wrote:
> On Mon, 2024-06-24 at 10:45 +0200, Roberto Sassu wrote:
> > My only comment would be that I would not call the new functions with
> > the ima_ prefix, being those in security.c, which is LSM agnostic, but
> > I would rather use a name that more resembles the differences, if any.
>
> Commit 4af4662fa4a9 ("integrity: IMA policy") originally referred to these hooks
> as security_filter_rule_XXXX, but commit b8867eedcf76 ("ima: Rename internal
> filter rule functions") renamed the function to ima_filter_rule_XXX) to avoid
> security namespace polution.
>
> If these were regular security hooks, the hooks would be named:
> filter_rule_init, filter_rule_free, filter_rule_match with the matching
> "security" prefix functions. Audit and IMA would then register the hooks.
>
> I agree these functions should probably be renamed again, probably to
> security_ima_filter_rule_XXXX.

It's funny, my mind saw that the patch was removing those preprocessor
macros and was so happy it must have shut off, because we already have
security_XXX functions for these :)

See security_audit_rule_init(), security_audit_rule_free(), and
security_audit_rule_match().

Casey, do you want to respin this patch to use the existing LSM
functions?  It looks like you should have Mimi's and Roberto's support
in this.  Please submit this as a standalone patch as it really is a
IMA/LSM cleanup.

Thanks all.

-- 
paul-moore.com