Re: Deadlock when using crypto API for block devices

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On Fri, 24 Aug 2018, Herbert Xu wrote:

> On Fri, Aug 24, 2018 at 07:06:32AM -0400, Mikulas Patocka wrote:
> >
> > A quick search through the crypto code shows that ahash_save_req and 
> > seqiv_aead_encrypt return -ENOMEM.
> > 
> > Will you fix them?
> 
> These only trigger for unaligned buffers.  It would be much better
> if dm-crypt can ensure that the input/output is properly unaligned
> and if otherwise do the allocation in dm-crypt.

But we are relying here on an implementation detail and not on contract.

Mikulas



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