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Subject: Re: [PATCH 05/25] crypto: omap - switch to skcipher API
To:     Tony Lindgren <tony@atomide.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>
CC:     <linux-crypto@vger.kernel.org>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Biggers <ebiggers@google.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-omap@vger.kernel.org>
References: <20191014121910.7264-1-ard.biesheuvel@linaro.org>
 <20191014121910.7264-6-ard.biesheuvel@linaro.org>
 <20191015172843.GB5610@atomide.com>
From:   Tero Kristo <t-kristo@ti.com>
Message-ID: <10a69466-7677-ff66-e5e4-9e563c1e457e@ti.com>
Date:   Thu, 17 Oct 2019 13:25:42 +0300
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On 15/10/2019 20:28, Tony Lindgren wrote:
> * Ard Biesheuvel <ard.biesheuvel@linaro.org> [191014 12:20]:
>> Commit 7a7ffe65c8c5 ("crypto: skcipher - Add top-level skcipher interface")
>> dated 20 august 2015 introduced the new skcipher API which is supposed to
>> replace both blkcipher and ablkcipher. While all consumers of the API have
>> been converted long ago, some producers of the ablkcipher remain, forcing
>> us to keep the ablkcipher support routines alive, along with the matching
>> code to expose [a]blkciphers via the skcipher API.
>>
>> So switch this driver to the skcipher API, allowing us to finally drop the
>> blkcipher code in the near future.
> 
> Adding Tero to loop as I think he was the last one to update this code.

With this patch, I am seeing the SW fallback fail with the following 
crash. Any ideas why this happens? This on top of 5.4-rc2, I did not 
pick any other crypto patches from the lists, but have couple of local 
fixes to get AES working properly with latest changes to testmgr. Am I 
missing something?

-Tero


[   11.458071] 8<--- cut here --- 

[   11.461205] Unable to handle kernel NULL pointer dereference at 
virtual addre
ss 00000000 

[   11.469352] pgd = e8df20f8 

[   11.472083] [00000000] *pgd=00000000 

[   11.475691] Internal error: Oops: 5 [#1] SMP ARM 

[   11.480325] Modules linked in: syscopyarea cfbimgblt sysfillrect 
sysimgblt fb
_sys_fops cfbcopyarea sha512_arm(+) dwc3 ecb udc_core usb_common evdev 
aes_arm a
es_generic snd_soc_simple_card snd_soc_simple_card_utils 
encoder_tpd12s015 leds_
gpio led_class aes_arm_bs gpio_fan crypto_simd omapdss connector_hdmi 
omapdss_ba
se cpufreq_dt cryptd drm omap_wdt watchdog drm_panel_orientation_quirks 
cec omap
_aes_driver(+) omap_sham(+) phy_omap_usb2 dwc3_omap omap_mailbox 
rtc_omap blueto
oth ecdh_generic ecc libaes snd_soc_davinci_mcasp snd_soc_ti_edma 
snd_soc_ti_sdm
a bq27xxx_battery_hdq bq27xxx_battery snd_soc_tlv320aic3x extcon_palmas 
rtc_palm
as palmas_pwrbutton snd_soc_core snd_pcm_dmaengine omap_rng snd_pcm 
rng_core snd
_timer omap_hdq snd at24 soundcore tmp102 wire cn rtc_ds1307 hwmon 
omap_des cryp
to_engine omap_crypto autofs4 

[   11.552884] CPU: 0 PID: 979 Comm: cryptomgr_test Not tainted 
5.4.0-rc2-00014-
g6f57ec1e433d-dirty #334 

[   11.562138] Hardware name: Generic DRA74X (Flattened Device Tree) 

[   11.568259] PC is at __crypto_xor+0x20/0xa0
[   11.572454] LR is at 0x10 

[   11.575080] pc : [<c0494a10>]    lr : [<00000010>]    psr: 20010113 

[   11.581369] sp : eb5f9a3c  ip : 676e6953  fp : eb5f9cec 

[   11.586611] r10: c0e05148  r9 : eb4a4e80  r8 : 00000010 

[   11.591853] r7 : 00000003  r6 : eb2e6000  r5 : fffffffc  r4 : 
eb2e6000
[   11.598403] r3 : 00000010  r2 : 00000000  r1 : eb2e6000  r0 : 
eb2e6000
[   11.604955] Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM 
Segment none
[   11.612115] Control: 10c5387d  Table: abd0806a  DAC: 00000051 

[   11.617883] Process cryptomgr_test (pid: 979, stack limit = 
0x99cee04c)
[   11.624521] Stack: (0xeb5f9a3c to 0xeb5fa000) 

[   11.628891] 9a20: 

     00000010 

[   11.637101] 9a40: eb2e6000 eb2e6000 00000003 c04a45f8 edc12858 
eb2e6000 edc12
858 eb2e6000 

[   11.645310] 9a60: eb057020 00000000 00000010 eb057020 00000000 
00000010 00000
000 00000000 

[   11.653519] 9a80: 00000000 00000000 00000000 00000000 00000010 
00000000 00000
010 00000010 

[   11.661729] 9aa0: 00000000 09865966 eb5f9b00 eb22c400 c0e05148 
00000003 00000
400 00000000 

[   11.669938] 9ac0: 00000400 bf18c4c0 00000000 00000000 00000000 
00000000 00000
0b3 00000000 

[   11.678147] 9ae0: 00000000 00000001 00000001 00000001 00000000 
00000000 00000
000 09865966
[   11.686356] 9b00: 00000010 00000000 eb057020 eb057020 eb379800 
eb379940 00000
000 00000000 

[   11.694566] 9b20: eb4a4e80 00000400 0000084c 00000000 00000002 
00000001 00000
000 00000001 

[   11.702774] 9b40: 00000000 c016e38c 00000129 00000000 00000000 
00000001 00000
001 00000001 

[   11.710983] 9b60: eb379940 a8a2cc6a 00000002 09865966 c0a04b3c 
efd86300 eb245
7c0 efd862c0 

[   11.719193] 9b80: eb245900 a8d4a57d 00000002 00000000 eb5f9cf4 
c016ef74 00000
000 efd86300 

[   11.727402] 9ba0: 00000000 00000001 00000000 00000001 00000000 
c016e38c eb379
80c 09865966 

[   11.735611] 9bc0: efd86300 efd86300 eb21f240 efd862c0 eb21f380 
00000000 eb5f9
d20 eb2e6010 

[   11.743819] 9be0: c0e05148 eb2e6000 00000010 c04dfdd4 00000000 
00000001 c08fb
4b8 00000000 

[   11.752028] 9c00: 00000020 00000020 eb2e6000 eb057000 c0e05148 
eb0570c0 00000
001 c049e5f8 

[   11.760237] 9c20: eb057000 00000000 00000000 00000010 00000000 
c0a2eca8 00000
010 efd862c0 

[   11.768446] 9c40: 2eff5000 eb21f1c0 eb245740 c0e0554c eb5f9c94 
ebe5c040 efd86
2c0 ebe5c000 

[   11.776656] 9c60: eb4a4e40 ebf65c80 c0a30694 00000000 00000000 
09865966 c0a2e
c9c 00000010
[   11.784865] 9c80: c0a2ec9c eb057000 c0e05148 c0a2eca8 00000000 
00000010 eb5f9
cac c049e6fc 

[   11.793073] 9ca0: eb5f9cac 00000000 00000000 00000009 00000000 
00000000 eb5f9
d28 00000000 

[   11.801282] 9cc0: bf18f880 09865966 00000000 09865966 eb22c400 
eb057000 eb22c
400 c0a498f8 

[   11.809492] 9ce0: 00000000 eb5f9d28 c0a2ec9c c049f850 00000010 
eb5f9d20 00000
001 7fffffff 

[   11.817702] 9d00: 00000001 00000000 eb07e200 eb5f9e64 c0b7dc78 
eb20ccc0 00000
000 00000000 

[   11.825910] 9d20: c0b80cf4 00000010 00000000 00000000 eb5f9d30 
eb5f9d30 00000
000 00000001 

[   11.834119] 9d40: c0e05148 09865966 eb49e004 00000000 00000001 
00000001 00000
cc0 eb057168 

[   11.842328] 9d60: eb20cd00 eb07e280 00000001 c02963a4 00000000 
0000000a 00000
000 00000000 

[   11.850536] 9d80: ffffffff 00000000 00000000 ffffffff 00000000 
eb1f2800 00000
dc0 00000c30 

[   11.858746] 9da0: c0e763bc edc172e0 c0a2d3dc c015d2a4 00000cc0 
09865966 ec800
180 eb5f9e64 

[   11.866954] 9dc0: c0b685b2 eb5f9e44 ffffffff c0b685b2 00000002 
eb5f9df4 c0aab
698 c08f6464 

[   11.875163] 9de0: ffffff0f ffff0a00 14a0619b eb5f9e64 bf18f8a8 
ffffff0f ffff0
a00 09865966
[   11.883373] 9e00: c0eac400 c0e05148 c0a498f8 eb07e200 eb07e200 
00000001 eb22c
400 09865966 

[   11.891582] 9e20: c0a2d74c c0a2ec9c c0a498f8 c0a2f620 eb07e200 
00000001 eb22c
400 eb057000 

[   11.899790] 9e40: c0a2d74c c049fef0 c0a2ec9c eb22c400 eb057000 
eb057180 00000
000 00000000 

[   11.907998] 9e60: eb057168 eb200030 eb07e280 c049d63c eb057000 
09865966 eb07e
200 eb20ccc0 

[   11.916208] 9e80: eb22c400 eb07e200 eb057000 c0a2d74c eb20cd00 
eb07e280 c0a2d
3dc c04a1eb8 

[   11.924418] 9ea0: eb057000 00000000 c04a1e38 0000001b 00001185 
ffffffff c0e05
148 eb07e200 

[   11.932626] 9ec0: eb07e280 c049dff0 ecb29100 00000400 efd862c0 
ecb29080 c0e09
ebc ffffffff 

[   11.940835] 9ee0: c08fb4b8 00000102 eb0c6018 efd862c0 ecb29080 
eb245740 ebca5
000 00000001 

[   11.949043] 9f00: 00000002 eb0c7b64 eb5f9f6c c08fb4b8 00000000 
eb0c7b60 00000
001 eb0c7b6c 

[   11.957251] 9f20: 00000000 2eff5000 c0a04adc c08fba14 eb245b90 
efd862c0 00000
000 00000000
[   11.965460] 9f40: 00000000 09865966 eb0c7b64 eb245740 eb5f8000 
09865966 ffffe
000 eb07e200 

[   11.973668] 9f60: 00000000 eb3f8b80 eb5f8000 eb07e200 c049d144 
eb0c7b64 eb22e
29c c049d184 

[   11.981877] 9f80: eb22e280 c015c708 00000001 eb3f8b80 c015c5fc 
00000000 00000
000 00000000 

[   11.990086] 9fa0: 00000000 00000000 00000000 c01010e8 00000000 
00000000 00000
000 00000000 

[   11.998294] 9fc0: 00000000 00000000 00000000 00000000 00000000 
00000000 00000
000 00000000 

[   12.006502] 9fe0: 00000000 00000000 00000000 00000000 00000013 
00000000 00000
000 00000000 

[   12.014721] [<c0494a10>] (__crypto_xor) from [<c04a45f8>] 
(crypto_cbc_encrypt
+0xf4/0x13c) 

[   12.022945] [<c04a45f8>] (crypto_cbc_encrypt) from [<bf18c4c0>] 
(omap_aes_cry
pt+0xc8/0x114 [omap_aes_driver]) 

[   12.032924] [<bf18c4c0>] (omap_aes_crypt [omap_aes_driver]) from 
[<c049f850>]
  (test_skcipher_vec_cfg+0x1c8/0x7e4) 

[   12.043228] [<c049f850>] (test_skcipher_vec_cfg) from [<c049fef0>] 
(test_skci
pher+0x84/0xf0)
[   12.051701] [<c049fef0>] (test_skcipher) from [<c04a1eb8>] 
(alg_test_skcipher
+0x80/0x140) 

[   12.059912] [<c04a1eb8>] (alg_test_skcipher) from [<c049dff0>] 
(alg_test.part
.8+0x8c/0x3a0) 

[   12.068297] [<c049dff0>] (alg_test.part.8) from [<c049d184>] 
(cryptomgr_test+
0x40/0x48) 

[   12.076336] [<c049d184>] (cryptomgr_test) from [<c015c708>] 
(kthread+0x10c/0x
148) 

[   12.083853] [<c015c708>] (kthread) from [<c01010e8>] 
(ret_from_fork+0x14/0x2c
) 

[   12.091100] Exception stack(0xeb5f9fb0 to 0xeb5f9ff8) 

[   12.096169] 9fa0:                                     00000000 
00000000 00000
000 00000000 

[   12.104378] 9fc0: 00000000 00000000 00000000 00000000 00000000 
00000000 00000
000 00000000 

[   12.112593] 9fe0: 00000000 00000000 00000000 00000000 00000013 
00000000
[   12.119240] Code: e2425004 e1a0e003 e1a04000 e5b6c004 (e5b57004) 

[   12.125437] ---[ end trace 9b4a71e796035151 ]---
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