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Date: Thu, 30 Jan 2020 00:36:41 +0000
From: Iuliana Prodan <iuliana.prodan@....com>
To: Corentin Labbe <clabbe.montjoie@...il.com>
CC: Herbert Xu <herbert@...dor.apana.org.au>,
Horia Geanta <horia.geanta@....com>,
Aymen Sghaier <aymen.sghaier@....com>,
"David S. Miller" <davem@...emloft.net>,
Silvano Di Ninno <silvano.dininno@....com>,
Franck Lenormand <franck.lenormand@....com>,
"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH v4 0/9] crypto: caam - backlogging support
On 1/23/2020 9:43 PM, Corentin Labbe wrote:
> 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 ]---
>
Thanks for testing this.
I'll fix it in v5.
Iulia
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