linux-kernel - Re: [PATCH v7 2/5] KEYS: trusted: Change -EINVAL to -E2BIG

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Date: Wed, 29 May 2024 15:20:25 +0300
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Stefan Berger" <stefanb@...ux.ibm.com>, "Herbert Xu"
 <herbert@...dor.apana.org.au>
Cc: <linux-integrity@...r.kernel.org>, <keyrings@...r.kernel.org>,
 <Andreas.Fuchs@...ineon.com>, "James Prestwood" <prestwoj@...il.com>,
 "David Woodhouse" <dwmw2@...radead.org>, "Eric Biggers"
 <ebiggers@...nel.org>, "James Bottomley"
 <James.Bottomley@...senpartnership.com>, <linux-crypto@...r.kernel.org>,
 "Lennart Poettering" <lennart@...ttering.net>, "David S. Miller"
 <davem@...emloft.net>, "open list" <linux-kernel@...r.kernel.org>, "Mimi
 Zohar" <zohar@...ux.ibm.com>, "David Howells" <dhowells@...hat.com>, "Paul
 Moore" <paul@...l-moore.com>, "James Morris" <jmorris@...ei.org>, "Serge E.
 Hallyn" <serge@...lyn.com>, "open list:SECURITY SUBSYSTEM"
 <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH v7 2/5] KEYS: trusted: Change -EINVAL to -E2BIG

On Wed May 29, 2024 at 4:50 AM EEST, Stefan Berger wrote:
>
>
> On 5/28/24 17:08, Jarkko Sakkinen wrote:
> > Report -E2BIG instead of -EINVAL when too large size for the key blob is
> > requested.
> > 
> > Signed-off-by: Jarkko Sakkinen <jarkko@...nel.org>
>
> Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>

Thank you.

Hmm... I'd like to add even:

Cc: stable@...r.kernel.org # v5.13+
Fixes: f2219745250f ("security: keys: trusted: use ASN.1 TPM2 key format for the blobs")

It turned out to be useful error message and would be useful also for
stable kernels. So if no decent counter-arguments, I'll just pick it
to my master branch.

BR, Jarkko