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From: Paul Moore <paul@paul-moore.com>
To: Steve Grubb <sgrubb@redhat.com>
Cc: rgb@redhat.com, linux-kernel@vger.kernel.org,
	Mimi Zohar <zohar@linux.ibm.com>,
	Lakshmi Ramasubramanian <nramas@linux.microsoft.com>,
	linux-audit@redhat.com, linux-integrity@vger.kernel.org
Subject: Re: [PATCH 1/2] integrity: Add errno field in audit message
Date: Mon, 15 Jun 2020 18:58:13 -0400
Message-ID: <CAHC9VhT6JSLBD-JMfQbn9eUsUg=juznRz41DTOaia-=WhrAAuA@mail.gmail.com> (raw)
In-Reply-To: <8800031.dr63W5FlUW@x2>

On Mon, Jun 15, 2020 at 6:23 PM Steve Grubb <sgrubb@redhat.com> wrote:
> On Friday, June 12, 2020 3:50:14 PM EDT Lakshmi Ramasubramanian wrote:
> > On 6/12/20 12:25 PM, Mimi Zohar wrote:
> > > The idea is a good idea, but you're assuming that "result" is always
> > > errno.  That was probably true originally, but isn't now.  For
> > > example, ima_appraise_measurement() calls xattr_verify(), which
> > > compares the security.ima hash with the calculated file hash.  On
> > > failure, it returns the result of memcmp().  Each and every code path
> > > will need to be checked.
> >
> > Good catch Mimi.
> >
> > Instead of "errno" should we just use "result" and log the value given
> > in the result parameter?
>
> That would likely collide with another field of the same name which is the
> operation's results. If it really is errno, the name is fine. It's generic
> enough that it can be reused on other events if that mattered.

Steve, what is the historical reason why we have both "res" and
"result" for indicating a boolean success/fail?  I'm just curious how
we ended up this way, and who may still be using "result".

-- 
paul moore
www.paul-moore.com

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Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-11  0:03 Lakshmi Ramasubramanian
2020-06-11  0:04 ` [PATCH 2/2] IMA: Add audit log for failure conditions Lakshmi Ramasubramanian
2020-06-12 20:23   ` Mimi Zohar
2020-06-11  1:45 ` [PATCH 1/2] integrity: Add errno field in audit message Paul Moore
2020-06-11  1:58   ` Lakshmi Ramasubramanian
2020-06-11  2:19     ` Paul Moore
2020-06-12 19:25 ` Mimi Zohar
2020-06-12 19:50   ` Lakshmi Ramasubramanian
2020-06-15 22:23     ` Steve Grubb
2020-06-15 22:58       ` Paul Moore [this message]
2020-06-16 15:29         ` Steve Grubb
2020-06-16 15:43           ` Lakshmi Ramasubramanian
2020-06-16 15:55             ` Steve Grubb
2020-06-16 19:53               ` Mimi Zohar
2020-06-16 20:28                 ` Steve Grubb

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