From: Eric Biggers <ebiggers@kernel.org>
To: Jarkko Sakkinen <jarkko@kernel.org>
Cc: "Herbert Xu" <herbert@gondor.apana.org.au>,
"David Gstir" <david@sigma-star.at>,
"Sumit Garg" <sumit.garg@linaro.org>,
"Ahmad Fatoum" <a.fatoum@pengutronix.de>,
"Mimi Zohar" <zohar@linux.ibm.com>,
"Horia Geantă" <horia.geanta@nxp.com>,
"Jonathan Corbet" <corbet@lwn.net>,
"David Howells" <dhowells@redhat.com>,
"James Bottomley" <jejb@linux.ibm.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
"James Morris" <jmorris@namei.org>,
"Serge E. Hallyn" <serge@hallyn.com>,
"Aymen Sghaier" <aymen.sghaier@nxp.com>,
"David S. Miller" <davem@davemloft.net>,
"Udit Agarwal" <udit.agarwal@nxp.com>,
"Jan Luebbe" <j.luebbe@pengutronix.de>,
"Franck Lenormand" <franck.lenormand@nxp.com>,
"keyrings@vger.kernel.org" <keyrings@vger.kernel.org>,
"linux-crypto@vger.kernel.org" <linux-crypto@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-integrity@vger.kernel.org"
<linux-integrity@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-security-module@vger.kernel.org"
<linux-security-module@vger.kernel.org>
Subject: Re: [PATCH v1 3/3] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys
Date: Wed, 31 Mar 2021 23:03:37 -0700 [thread overview]
Message-ID: <YGViOc3DG+Pjuur6@sol.localdomain> (raw)
In-Reply-To: <YGVfDUHunGC44iuH@kernel.org>
On Thu, Apr 01, 2021 at 08:50:05AM +0300, Jarkko Sakkinen wrote:
> On Thu, Apr 01, 2021 at 12:11:32PM +1100, Herbert Xu wrote:
> > On Wed, Mar 31, 2021 at 04:34:29PM -0700, Eric Biggers wrote:
> > > On Thu, Apr 01, 2021 at 02:31:46AM +0300, Jarkko Sakkinen wrote:
> > > >
> > > > It's a bummer but uapi is the god in the end. Since TPM does not do it
> > > > today, that behaviour must be supported forever. That's why a boot option
> > > > AND a warning would be the best compromise.
> > >
> > > It's not UAPI if there is no way for userspace to tell if it changed.
> >
> > Exactly. UAPI is only an issue if something *breaks*.
>
> If there's even one user that comes shouting that he has a user space
> configuration, where e.g. rng entropy is consumed constantly and the
> code assumes that trusted keys does not add to that, then something
> would break.
>
> It would be a crap user space yes, but I don't want to go on reverting
> because of that. I think there is small but still existing chance that
> something could break.
random.c no longer provides any interfaces that subtract entropy credits, as
that was never something that made sense. So "consuming" all the entropy from
random.c isn't a thing anymore.
>
> Why not just add a boot parameter instead of making brutal enforcing
> changes, indirectly visible to the user space?
Why not just fix this bug instead of providing an option to fix it that everyone
will need to remember to provide?
- Eric
next prev parent reply other threads:[~2021-04-01 6:04 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-16 17:01 [PATCH v1 0/3] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys Ahmad Fatoum
2021-03-16 17:01 ` [PATCH v1 1/3] crypto: caam - add in-kernel interface for blob generator Ahmad Fatoum
2021-03-21 20:46 ` Horia Geantă
2021-03-23 16:41 ` Ahmad Fatoum
2021-03-16 17:01 ` [PATCH v1 2/3] KEYS: trusted: implement fallback to kernel RNG Ahmad Fatoum
2021-03-16 17:01 ` [PATCH v1 3/3] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys Ahmad Fatoum
2021-03-16 19:22 ` Jarkko Sakkinen
2021-03-17 13:58 ` Ahmad Fatoum
2021-03-16 23:14 ` Richard Weinberger
2021-03-17 7:39 ` Sumit Garg
2021-03-17 8:07 ` Richard Weinberger
2021-03-17 14:02 ` Ahmad Fatoum
2021-03-30 21:28 ` Richard Weinberger
2021-03-21 20:48 ` Horia Geantă
2021-03-23 16:35 ` Ahmad Fatoum
2021-03-23 18:07 ` Mimi Zohar
2021-03-24 9:26 ` Ahmad Fatoum
2021-03-24 10:47 ` Sumit Garg
2021-03-24 14:07 ` Ahmad Fatoum
2021-03-25 5:26 ` Sumit Garg
2021-03-27 12:41 ` David Gstir
2021-03-28 20:37 ` Jarkko Sakkinen
2021-03-29 10:11 ` Ahmad Fatoum
2021-03-31 23:29 ` Jarkko Sakkinen
2021-03-30 7:26 ` Sumit Garg
2021-03-31 23:30 ` Jarkko Sakkinen
2021-04-01 7:41 ` Ahmad Fatoum
2021-03-30 21:47 ` Eric Biggers
2021-03-31 23:31 ` Jarkko Sakkinen
2021-03-31 23:34 ` Eric Biggers
2021-04-01 1:11 ` Herbert Xu
2021-04-01 5:50 ` Jarkko Sakkinen
2021-04-01 6:03 ` Eric Biggers [this message]
2021-04-01 5:46 ` Jarkko Sakkinen
2021-03-24 16:14 ` James Bottomley
2021-03-24 20:49 ` Mimi Zohar
2021-03-24 21:58 ` James Bottomley
2021-04-02 1:49 ` Serge E. Hallyn
2021-03-31 18:35 ` Richard Weinberger
2021-04-01 10:15 ` Ahmad Fatoum
2021-04-01 10:23 ` Richard Weinberger
2021-03-16 23:10 ` [PATCH v1 0/3] " Richard Weinberger
2021-03-17 14:08 ` Ahmad Fatoum
2021-03-30 21:50 ` Richard Weinberger
2021-04-01 10:04 ` Ahmad Fatoum
2021-04-01 10:20 ` Richard Weinberger
2021-04-01 10:28 ` Ahmad Fatoum
2021-04-01 10:53 ` Richard Weinberger
2021-04-01 10:57 ` Ahmad Fatoum
2021-04-01 11:05 ` Richard Weinberger
2021-04-01 11:13 ` Ahmad Fatoum
2021-04-01 11:16 ` Richard Weinberger
2021-03-30 22:04 ` Richard Weinberger
2021-03-30 22:16 ` James Bottomley
2021-03-31 18:36 ` Richard Weinberger
2021-03-31 18:49 ` James Bottomley
2021-03-31 19:36 ` Richard Weinberger
2021-04-01 10:06 ` Ahmad Fatoum
2021-04-01 13:20 ` Sumit Garg
2021-04-01 18:26 ` James Bottomley
2021-04-01 12:55 ` Sumit Garg
2021-04-01 13:17 ` Richard Weinberger
2021-04-01 13:30 ` Ahmad Fatoum
2021-04-01 13:52 ` Sumit Garg
2021-04-01 13:59 ` Richard Weinberger
2021-04-01 14:12 ` Sumit Garg
2021-04-01 11:11 ` David Howells
2021-03-21 20:01 ` Horia Geantă
2021-03-23 16:34 ` Ahmad Fatoum
2021-03-24 6:23 ` Sumit Garg
2021-03-23 16:37 ` Ahmad Fatoum
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