linux-kernel - Re: [PATCH] crypto: ccree - dec auth tag size from cryptlen map

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Date:   Sun, 9 Feb 2020 11:11:58 +0200
From:   Gilad Ben-Yossef <gilad@...yossef.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Ofir Drang <ofir.drang@....com>,
        stable <stable@...r.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH] crypto: ccree - dec auth tag size from cryptlen map

On Thu, Feb 6, 2020 at 4:45 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
>
> Hi Gilad,
>
> On Sun, Feb 2, 2020 at 5:19 PM Gilad Ben-Yossef <gilad@...yossef.com> wrote:
> > Remove the auth tag size from cryptlen before mapping the destination
> > in out-of-place AEAD decryption thus resolving a crash with
> > extended testmgr tests.
> >
> > Signed-off-by: Gilad Ben-Yossef <gilad@...yossef.com>
> > Reported-by: Geert Uytterhoeven <geert+renesas@...der.be>
> > Cc: stable@...r.kernel.org # v4.19+
>
> Thanks, this fixes the crash seen on R-Car H3 ES2.0 with renesas_defconfig,
> CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=n, and CONFIG_CRYPTO_MANAGER_EXTRA_TESTS=y
>
> Tested-by: Geert Uytterhoeven <geert+renesas@...der.be>

Thanks again for your help.

>
> Remaining issues reported during boot:
>   1. alg: skcipher: blocksize for xts-aes-ccree (1) doesn't match
> generic impl (16)

Yes, this is actually a known issue with the generic XTS implementation.
See: https://lore.kernel.org/linux-crypto/VI1PR0402MB34858E4EF0ACA7CDB446FF5798CE0@VI1PR0402MB3485.eurprd04.prod.outlook.com/


>   2. alg: aead: rfc4543-gcm-aes-ccree decryption unexpectedly
> succeeded on test vector "random: alen=16 plen=39 authsize=16 klen=20
> novrfy=1"; expected_error=-EBADMSG or -22, cfg="random: may_sleep
> use_digest src_divs=[4.47%@...53, 30.80%@...65, 12.0%@+11,
> 6.22%@...99, 46.51%@...gnmask+3468]"

Yes, I am working on this one right now.

Many thanks,
Gilad