linux-kernel - Re: [PATCH] crypto: ctr: avoid VLA use

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Message-ID: <4726635.XOh0VtZf4O@tauon.chronox.de>
Date:   Wed, 14 Mar 2018 14:31:27 +0100
From:   Stephan Mueller <smueller@...onox.de>
To:     Salvatore Mesoraca <s.mesoraca16@...il.com>
Cc:     linux-kernel@...r.kernel.org, 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, 14:17:30 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.

>  	}
> 
>  	return err;



Ciao
Stephan