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Date:   Thu, 3 Mar 2022 10:27:47 +1200
From:   Herbert Xu <herbert@gondor.apana.org.au>
To:     Greg KH <gregkh@linuxfoundation.org>
Cc:     Giovanni Cabiddu <giovanni.cabiddu@intel.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Kyle Sanderson <kyle.leet@gmail.com>,
        Dave Chinner <david@fromorbit.com>, qat-linux@intel.com,
        Linux-Kernal <linux-kernel@vger.kernel.org>,
        linux-xfs <linux-xfs@vger.kernel.org>,
        Linux Crypto Mailing List <linux-crypto@vger.kernel.org>,
        device-mapper development <dm-devel@redhat.com>
Subject: Re: Intel QAT on A2SDi-8C-HLN4F causes massive data corruption with
 dm-crypt + xfs
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On Wed, Mar 02, 2022 at 03:56:36PM +0100, Greg KH wrote:
>
> > If not, then these are the patches that should be backported:
> >     7bcb2c99f8ed crypto: algapi - use common mechanism for inheriting flags
> >     2eb27c11937e crypto: algapi - add NEED_FALLBACK to INHERITED_FLAGS
> >     fbb6cda44190 crypto: algapi - introduce the flag CRYPTO_ALG_ALLOCATES_MEMORY
> >     b8aa7dc5c753 crypto: drivers - set the flag CRYPTO_ALG_ALLOCATES_MEMORY
> >     cd74693870fb dm crypt: don't use drivers that have CRYPTO_ALG_ALLOCATES_MEMORY
> > Herbert, correct me if I'm wrong here.
> 
> These need to be manually backported as they do not apply cleanly.  Can
> you provide such a set?  Or should I just disable a specific driver here
> instead which would be easier overall?

I think the safest thing is to disable qat in stable (possibly only
when DM_CRYPT is enabled/modular).  The patches in question while
good may have too wide an effect for the stable kernel series.

Giovanni, could you send Greg a Kconfig patch to do that?

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