linux-kernel - Re: [PATCH 2/6] crypto: ctr

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Message-ID: <CAJHCu1LQuvcxsfTYddN5o3=pMzj6mtnBKvTG9O378pv3w_Q24Q@mail.gmail.com>
Date:   Sun, 8 Apr 2018 10:58:48 +0200
From:   Salvatore Mesoraca <s.mesoraca16@...il.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     linux-kernel@...r.kernel.org,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>,
        linux-crypto@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Kees Cook <keescook@...omium.org>,
        Eric Biggers <ebiggers3@...il.com>,
        Laura Abbott <labbott@...hat.com>
Subject: Re: [PATCH 2/6] crypto: ctr - avoid VLA use

018-04-08 5:19 GMT+02:00 Herbert Xu <herbert@...dor.apana.org.au>:
> On Sat, Apr 07, 2018 at 08:38:19PM +0200, Salvatore Mesoraca wrote:
>>
>> @@ -206,6 +207,14 @@ static struct crypto_instance *crypto_ctr_alloc(struct rtattr **tb)
>>       if (alg->cra_blocksize < 4)
>>               goto out_put_alg;
>>
>> +     /* Block size must be <= MAX_BLOCKSIZE. */
>> +     if (alg->cra_blocksize > MAX_BLOCKSIZE)
>> +             goto out_put_alg;
>> +
>> +     /* Alignmask must be <= MAX_ALIGNMASK. */
>> +     if (alg->cra_alignmask > MAX_ALIGNMASK)
>> +             goto out_put_alg;
>> +
>
> Since you're also adding a check to cipher algorithms in general,
> none of these individual checks are needed anymore.

Fair enough.
After removing the individual checks the modification to the single files
will be just a couple of lines, is it OK for you if I collapse all of them in
just a single commit?

Thank you,

Salvatore