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Date: Wed, 14 Mar 2018 14:52:29 +0100
From: Stephan Mueller <smueller@...onox.de>
To: Salvatore Mesoraca <s.mesoraca16@...il.com>
Cc: linux-kernel@...r.kernel.org, Kernel Hardening <kernel-hardening@...ts.openwall.com>, linux-crypto@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Herbert Xu <herbert@...dor.apana.org.au>, Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] crypto: ctr: avoid VLA use
Am Mittwoch, 14. März 2018, 14:46:29 CET schrieb Salvatore Mesoraca:
Hi Salvatore,
> 2018-03-14 14:31 GMT+01:00 Stephan Mueller <smueller@...onox.de>:
> > Am Mittwoch, 14. März 2018, 14:17:30 CET schrieb Salvatore Mesoraca:
> >
> > Hi Salvatore,
> >
> >> if (walk.nbytes) {
> >>
> >> - crypto_ctr_crypt_final(&walk, child);
> >> - err = blkcipher_walk_done(desc, &walk, 0);
> >> + err = crypto_ctr_crypt_final(&walk, child);
> >> + err = blkcipher_walk_done(desc, &walk, err);
> >
> > I guess you either want to handle the error from crypto_ctr_crypt_final or
> > do an err |= blkcipher_walk_done.
>
> I think that blkcipher_walk_done handles and returns the error for me.
> Am I wrong?
You are right as you want to finalize the crypto operation even though the
encryption fails.
Please disregard my comment.
>
> Best regards,
>
> Salvatore
Ciao
Stephan
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