linux-kernel - Re: [PATCH] crypto: ecc - Protect ecc_digits_from

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Message-Id: <D10EVH7PZ358.F5M40RN8AII7@kernel.org>
Date: Sat, 04 May 2024 02:51:10 +0300
From: "Jarkko Sakkinen" <jarkko@...nel.org>
To: "Jarkko Sakkinen" <jarkko@...nel.org>, "Herbert Xu"
 <herbert@...dor.apana.org.au>
Cc: "Lukas Wunner" <lukas@...ner.de>, "Stefan Berger"
 <stefanb@...ux.ibm.com>, <keyrings@...r.kernel.org>,
 <linux-crypto@...r.kernel.org>, <davem@...emloft.net>,
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] crypto: ecc - Protect ecc_digits_from_bytes from
 reading too many bytes

On Sat May 4, 2024 at 2:49 AM EEST, Jarkko Sakkinen wrote:
> On Fri May 3, 2024 at 1:30 PM EEST, Herbert Xu wrote:
> > On Mon, Apr 29, 2024 at 01:14:15PM +0300, Jarkko Sakkinen wrote:
> > > 
> > > Yeah, sure, that would be even better, or even memzero_explicit()?
> >
> > memzero_explicit should only be used for stack memory.
>
> BTW, is this in kernel documentation? It's a guideline really
> and would be nice to have reminder, that's all.

Any case makes sense and is pretty obvious now that you said it.

BR, Jarkko