linux-kernel - Re: [PATCH v19 15/20] fsverity: expose verified fsverity built-in signatures to LSMs

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Date: Wed, 29 May 2024 23:01:20 -0700
From: Eric Biggers <ebiggers@...nel.org>
To: Jarkko Sakkinen <jarkko@...nel.org>
Cc: Paul Moore <paul@...l-moore.com>, Fan Wu <wufan@...ux.microsoft.com>,
	corbet@....net, zohar@...ux.ibm.com, jmorris@...ei.org,
	serge@...lyn.com, tytso@....edu, axboe@...nel.dk, agk@...hat.com,
	snitzer@...nel.org, mpatocka@...hat.com, eparis@...hat.com,
	linux-doc@...r.kernel.org, linux-integrity@...r.kernel.org,
	linux-security-module@...r.kernel.org, fsverity@...ts.linux.dev,
	linux-block@...r.kernel.org, dm-devel@...ts.linux.dev,
	audit@...r.kernel.org, linux-kernel@...r.kernel.org,
	Deven Bowers <deven.desai@...ux.microsoft.com>
Subject: Re: [PATCH v19 15/20] fsverity: expose verified fsverity built-in
 signatures to LSMs

On Thu, May 30, 2024 at 08:51:21AM +0300, Jarkko Sakkinen wrote:
> On Thu May 30, 2024 at 4:44 AM EEST, Paul Moore wrote:
> > > +	err = security_inode_setintegrity(inode,
> > > +					  LSM_INT_FSVERITY_BUILTINSIG_VALID,
> > > +					  signature,
> > > +					  le32_to_cpu(sig_size));
> >
> > I like this much better without the explicit inode cast :)
> 
> Would be nice btw if that was 'ret' or 'rc' because err is such
> a common name for exception handler alike goto-labels... Looks
> confusing just because of that :-)
> 

A lot of kernel code, including the rest of fs/verity/, uses the convention that
"0 or negative errno" return values are named 'err' (and return values that
aren't necessarily an errno are named something else).  So it's fine as-is.

- Eric