Am Dienstag, 21. April 2015, 14:56:31 schrieb Stephan Mueller:
Hi Stephan,
> Am Dienstag, 21. April 2015, 14:35:47 schrieb Stephan Mueller:
>
> Hi Stephan,
>
> > Hi Herbert,
> >
> > I am currently working on the template for SP800-38F key wrapping. The
> > module is operational and calculates what I want.
> >
> > However, I have one problem I am having difficulties to track down and I
> > am
> > wondering whether you could point me to the right direction.
> >
> > When a caller calls
> >
> > crypto_alloc_aead("kw(aes)", 0, 0);
> >
> > somehow the refcount of the kernel module implementing the keywrapping is
> > not increased. Once can see that in lsmod where the "Used by" value
> > remains
> > 0.
> >
> > Then when the caller deallocates the cipher handle, the refcount is -1
> > according to lsmod. With that, a second invocation of crypto_alloc_aead
> > will fail and I even cannot remove the module from the kernel.
> >
> > Who increases the refcount on the kernel crypto API side?
>
> I think I hit an even bigger problem: while playing with other AEAD ciphers,
> I see the same thing now:
>
> $ lsmod
> Module Size Used by
> ansi_cprng 12989 0
> drbg 30255 0
> algif_rng 12753 0
> seqiv 13003 -1
> ccm 17731 -1
> gcm 23371 -1
>
> Allocation of these ciphers fail.
After updating to the current cryptodev-2.6 tree from today, this issue
vanished.
Sorry for the noise, please disregard the thread.
>
> > Thanks a lot
--
Ciao
Stephan
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