Re: [PATCH v4 0/9] crypto: caam - backlogging support

[Corentin Labbe <clabbe.montjoie@gmail.com>]

On Mon, Jan 20, 2020 at 02:23:59PM +0200, Iuliana Prodan wrote:
> Integrate crypto_engine framework into CAAM, to make use of
> the engine queue.
> Added support for SKCIPHER, HASH, RSA and AEAD algorithms.
> This is intended to be used for CAAM backlogging support.
> The requests, with backlog flag (e.g. from dm-crypt) will be
> listed into crypto-engine queue and processed by CAAM when free.
> 
> While here, I've also made some refactorization.
> Patches #1 - #4 include some refactorizations on caamalg, caamhash
> and caampkc.
> Patch #5 changes the return code of caam_jr_enqueue function
> to -EINPROGRESS, in case of success, -ENOSPC in case the CAAM is
> busy, -EIO if it cannot map the caller's descriptor.
> Patches #6 - #9 integrate crypto_engine into CAAM, for
> SKCIPHER/AEAD/RSA/HASH algorithms.
> 
> ---
> Changes since V3:
> 	- update return on ahash_enqueue_req function from patch #9.
> 
> Changes since V2:
> 	- remove patch ("crypto: caam - refactor caam_jr_enqueue"),
> 	  that added some structures not needed anymore;
> 	- use _done_ callback function directly for skcipher and aead;
> 	- handle resource leak in case of transfer request to crypto-engine;
> 	- update commit messages.
> 
> Changes since V1:
> 	- remove helper function - akcipher_request_cast;
> 	- remove any references to crypto_async_request,
> 	  use specific request type;
> 	- remove bypass crypto-engine queue, in case is empty;
> 	- update some commit messages;
> 	- remove unrelated changes, like whitespaces;
> 	- squash some changes from patch #9 to patch #6;
> 	- added Reviewed-by.
> ---
> 
> Iuliana Prodan (9):
>   crypto: caam - refactor skcipher/aead/gcm/chachapoly {en,de}crypt
>     functions
>   crypto: caam - refactor ahash_done callbacks
>   crypto: caam - refactor ahash_edesc_alloc
>   crypto: caam - refactor RSA private key _done callbacks
>   crypto: caam - change return code in caam_jr_enqueue function
>   crypto: caam - support crypto_engine framework for SKCIPHER algorithms
>   crypto: caam - add crypto_engine support for AEAD algorithms
>   crypto: caam - add crypto_engine support for RSA algorithms
>   crypto: caam - add crypto_engine support for HASH algorithms
> 
>  drivers/crypto/caam/Kconfig    |   1 +
>  drivers/crypto/caam/caamalg.c  | 416 ++++++++++++++++++-----------------------
>  drivers/crypto/caam/caamhash.c | 341 ++++++++++++++++-----------------
>  drivers/crypto/caam/caampkc.c  | 187 +++++++++++-------
>  drivers/crypto/caam/caampkc.h  |  10 +
>  drivers/crypto/caam/caamrng.c  |   4 +-
>  drivers/crypto/caam/intern.h   |   2 +
>  drivers/crypto/caam/jr.c       |  37 +++-
>  drivers/crypto/caam/key_gen.c  |   2 +-
>  9 files changed, 523 insertions(+), 477 deletions(-)
> 

Hello

I have tested this serie on a imx8mn-ddr4-evk and get the follwing crash:
[   34.367787] Unable to handle kernel paging request at virtual address cccccccccccccccc
[   34.375715] Mem abort info:
[   34.378506]   ESR = 0x96000004
[   34.381572]   EC = 0x25: DABT (current EL), IL = 32 bits
[   34.386888]   SET = 0, FnV = 0
[   34.389948]   EA = 0, S1PTW = 0
[   34.393091] Data abort info:
[   34.395978]   ISV = 0, ISS = 0x00000004
[   34.399816]   CM = 0, WnR = 0
[   34.402781] [cccccccccccccccc] address between user and kernel address ranges
[   34.409922] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[   34.415492] Modules linked in: ctr des_generic caam_jr(+) caamhash_desc caamalg_desc rng_core authenc libdes fsl_imx8_ddr_perf snvs_pwrkey rtc_snvs caam error imx_cpufreq_dt
[   34.430977] CPU: 2 PID: 267 Comm: cryptomgr_test Not tainted 5.5.0-rc7-next-20200122-00009-geed96b480af6 #39
[   34.440799] Hardware name: NXP i.MX8MNano DDR4 EVK board (DT)
[   34.446542] pstate: 60000005 (nZCv daif -PAN -UAO)
[   34.451337] pc : __kmalloc+0xc4/0x290
[   34.454997] lr : __kmalloc+0x48/0x290
[   34.458655] sp : ffff800011b0b740
[   34.461965] x29: ffff800011b0b740 x28: 0000000000000002 
[   34.467275] x27: 0000000000000080 x26: ffff800010c4b598 
[   34.472584] x25: 0000000000000cc0 x24: ffff00007b79b000 
[   34.477894] x23: 000000000000ac02 x22: ffff800008c5c254 
[   34.483203] x21: 0000000000000dc1 x20: cccccccccccccccc 
[   34.488512] x19: ffff00007d404200 x18: 0000000000000002 
[   34.493821] x17: 0000000008080040 x16: 0000000008182040 
[   34.499131] x15: 0000000002004800 x14: 0000000000000000 
[   34.504440] x13: 0000000000000000 x12: 0000000300000017 
[   34.509749] x11: fffffe0001ca2702 x10: 0000000000000000 
[   34.515058] x9 : 0000000000000000 x8 : ffff8000115e98c8 
[   34.520368] x7 : ffff800011776000 x6 : 0000000000000000 
[   34.525677] x5 : 000000000000ac02 x4 : 0000000000000011 
[   34.530986] x3 : 0000000000000002 x2 : 0000000000000000 
[   34.536295] x1 : ffff00007aaaf000 x0 : 0000000000000001 
[   34.541606] Call trace:
[   34.544051]  __kmalloc+0xc4/0x290
[   34.547377]  skcipher_edesc_alloc+0x154/0xab0 [caam_jr]
[   34.552607]  skcipher_encrypt+0x58/0x118 [caam_jr]
[   34.557397]  crypto_skcipher_encrypt+0x40/0x70
[   34.561839]  test_skcipher_vec_cfg+0x254/0x768
[   34.566279]  test_skcipher_vec+0xfc/0x148
[   34.570285]  alg_test_skcipher+0xc0/0x1e8
[   34.574294]  alg_test.part.32+0xb0/0x378
[   34.578214]  alg_test+0x3c/0x68
[   34.581354]  cryptomgr_test+0x44/0x50
[   34.585015]  kthread+0x118/0x120
[   34.588241]  ret_from_fork+0x10/0x18
[   34.591818] Code: d5384101 b9402262 b9401020 11000400 (f8626a98) 
[   34.597910] ---[ end trace 3e4862893c99a748 ]---

Regards