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.
>
> Thanks a lot
--
Ciao
Stephan
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