linux-kernel - Re: [PATCH 1/3] dm integrity: do not filter algos with CRYPTO_ALG_ALLOCATES

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <ZKXnUeueV6ncaJM6@gondor.apana.org.au>
Date:   Thu, 6 Jul 2023 05:57:37 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Giovanni Cabiddu <giovanni.cabiddu@...el.com>
Cc:     Eric Biggers <ebiggers@...nel.org>, agk@...hat.com,
        snitzer@...nel.org, linux-crypto@...r.kernel.org,
        dm-devel@...hat.com, linux-kernel@...r.kernel.org,
        qat-linux@...el.com, heinzm@...hat.com, meenakshi.aggarwal@....com,
        horia.geanta@....com, V.Sethi@....com, pankaj.gupta@....com,
        gaurav.jain@....com, davem@...emloft.net, iuliana.prodan@....com,
        Fiona Trahe <fiona.trahe@...el.com>
Subject: Re: [PATCH 1/3] dm integrity: do not filter algos with
 CRYPTO_ALG_ALLOCATES_MEMORY

On Wed, Jul 05, 2023 at 09:57:54PM +0100, Giovanni Cabiddu wrote:
>
> Then we are then back to square one. We need to check how many entries
> are present in the scatterlists encrypted by crypt_journal() before
> adjusting the meaning of !CRYPTO_ALG_ALLOCATES_MEMORY.

Indeed.  I missed the fact that it was preallocating memory with
GFP_KERNEL.

So perhaps the answer is to adjust our API to allow the drivers to
pre-allocate memory.  I'll look into this.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt