Hi all,
running a current 4.4.6 kernel on a board using a Freescale P1020, I ran into an oops when calling crypto_alloc_aead using the talitos driver. I could also reproduce this using the run-time self tests:
[...]
[ 1.141095] talitos ffe30000.crypto: hwrng
[ 1.145381] Unable to handle kernel paging request for data at address 0x00000058
[ 1.152913] Faulting instruction address: 0xc02accc0
[ 1.157910] Oops: Kernel access of bad area, sig: 11 [#1]
[ 1.163315] SMP NR_CPUS=2 P1020 RDB
[ 1.166810] Modules linked in:
[ 1.169875] CPU: 0 PID: 1007 Comm: cryptomgr_test Not tainted 4.4.6 #1
[ 1.176415] task: db5ec200 ti: db4d6000 task.ti: db4d6000
[ 1.181821] NIP: c02accc0 LR: c02acd18 CTR: c02acd04
[ 1.186793] REGS: db4d7d30 TRAP: 0300 Not tainted (4.4.6)
[ 1.192457] MSR: 00029000 <CE,EE,ME> CR: 95009359 XER: e0000000
[ 1.198585] DEAR: 00000058 ESR: 00000000
GPR00: c017bdc0 db4d7de0 db5ec200 df424b48 00000000 00000000 df424bfc db75a600
GPR08: df424b48 00000000 db75a628 db4d6000 00000149 00000000 c0044cac db5acda0
GPR16: 00000000 00000000 00000000 00000000 00000000 00000000 00000400 df424940
GPR24: df424900 00003083 00000400 c0180000 db75a640 c03e9f84 df424b40 df424b48
[ 1.230978] NIP [c02accc0] talitos_cra_init+0x28/0x6c
[ 1.236039] LR [c02acd18] talitos_cra_init_aead+0x14/0x28
[ 1.241443] Call Trace:
[ 1.243894] [db4d7de0] [c03e9f84] 0xc03e9f84 (unreliable)
[ 1.249322] [db4d7df0] [c017bdc0] crypto_create_tfm+0x5c/0xf0
[ 1.255083] [db4d7e10] [c017beec] crypto_alloc_tfm+0x98/0xf8
[ 1.260769] [db4d7e40] [c0186a20] alg_test_aead+0x28/0xc8
[ 1.266181] [db4d7e60] [c0186718] alg_test+0x260/0x2e0
[ 1.271333] [db4d7ee0] [c0183860] cryptomgr_test+0x30/0x54
[ 1.276843] [db4d7ef0] [c0044d80] kthread+0xd4/0xd8
[ 1.281741] [db4d7f40] [c000e4a4] ret_from_kernel_thread+0x5c/0x64
[ 1.287930] Instruction dump:
[ 1.290902] 38600000 4e800020 81230028 7c681b78 81490010 38e9ffc0 3929ffe8 554a073e
[ 1.298691] 2b8a000a 7d474f9e 812a0008 91230030 <80e90058> 39270060 7c0004ac 7cc04828
[ 1.306676] ---[ end trace 4b725069552c2912 ]---
[ 1.311298]
In a first attempt to fix this problem using the patch further below, I could prevent the oops, though the self tests still fail:
[...]
[ 1.145414] alg: aead: Test 1 failed on encryption for authenc-hmac-sha1-cbc-aes-talitos
[ 1.153564] 00000000: 53 69 6e 67 6c 65 20 62 6c 6f 63 6b 20 6d 73 67
[ 1.160041] 00000010: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 1.166509] 00000020: 00 00 00 00
[ 1.170041] alg: aead: Test 1 failed on encryption for authenc-hmac-sha1-cbc-3des-talitos
[ 1.178276] 00000000: 6f 54 20 6f 61 4d 79 6e 53 20 63 65 65 72 73 74
[ 1.184751] 00000010: 54 20 6f 6f 4d 20 6e 61 20 79 65 53 72 63 74 65
[ 1.191220] 00000020: 20 73 6f 54 20 6f 61 4d 79 6e 53 20 63 65 65 72
[ 1.197689] 00000030: 73 74 54 20 6f 6f 4d 20 6e 61 20 79 65 53 72 63
[ 1.204158] 00000040: 74 65 20 73 6f 54 20 6f 61 4d 79 6e 53 20 63 65
[ 1.210626] 00000050: 65 72 73 74 54 20 6f 6f 4d 20 6e 61 20 79 65 53
[ 1.217095] 00000060: 72 63 74 65 20 73 6f 54 20 6f 61 4d 79 6e 53 20
[ 1.223563] 00000070: 63 65 65 72 73 74 54 20 6f 6f 4d 20 6e 61 0a 79
[ 1.230038] 00000080: de ad be ef de ad be ef de ad be ef de ad be ef
[ 1.236515] 00000090: de ad be ef
[...]
[ 1.651807] alg: No test for authenc(hmac(md5),cbc(aes)) (authenc-hmac-md5-cbc-aes-talitos)
[ 1.660371] alg: No test for authenc(hmac(md5),cbc(des3_ede)) (authenc-hmac-md5-cbc-3des-talitos)
[ 1.669576] talitos ffe30000.crypto: md5-talitos alg registration failed
[ 1.676331] talitos ffe30000.crypto: sha1-talitos alg registration failed
[ 1.683155] talitos ffe30000.crypto: sha224-talitos alg registration failed
[ 1.690153] talitos ffe30000.crypto: sha256-talitos alg registration failed
[ 1.697150] talitos ffe30000.crypto: sha384-talitos alg registration failed
[ 1.704148] talitos ffe30000.crypto: sha512-talitos alg registration failed
[ 1.711146] talitos ffe30000.crypto: hmac-md5-talitos alg registration failed
[ 1.718317] talitos ffe30000.crypto: hmac-sha1-talitos alg registration failed
[ 1.725581] talitos ffe30000.crypto: hmac-sha224-talitos alg registration failed
[ 1.733014] talitos ffe30000.crypto: hmac-sha256-talitos alg registration failed
[ 1.740446] talitos ffe30000.crypto: hmac-sha384-talitos alg registration failed
[ 1.747878] talitos ffe30000.crypto: hmac-sha512-talitos alg registration failed
[ 1.755310] talitos ffe30000.crypto: fsl,sec3.3 algorithms registered in /proc/crypto
I'm unsure whether or not this is related to the talitos driver not being able to register the hash algorithms (as it does not yet implement state import/export functions).
Can anyone generally confirm the problem on a P1020 or other CPU using the talitos driver and/or knows how to fix the remaining issues?
Thanks a lot in advance,
Jonas
---
Patch:
--- a/drivers/crypto/talitos.c
+++ b/drivers/crypto/talitos.c
@@ -2519,21 +2519,10 @@ struct talitos_crypto_alg {
struct talitos_alg_template algt;
};
-static int talitos_cra_init(struct crypto_tfm *tfm)
+static int talitos_init_common(struct talitos_ctx *ctx, struct talitos_crypto_alg *talitos_alg)
{
- struct crypto_alg *alg = tfm->__crt_alg;
- struct talitos_crypto_alg *talitos_alg;
- struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
struct talitos_private *priv;
- if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
- talitos_alg = container_of(__crypto_ahash_alg(alg),
- struct talitos_crypto_alg,
- algt.alg.hash);
- else
- talitos_alg = container_of(alg, struct talitos_crypto_alg,
- algt.alg.crypto);
-
/* update context with ptr to dev */
ctx->dev = talitos_alg->dev;
@@ -2551,10 +2540,33 @@ static int talitos_cra_init(struct crypt
return 0;
}
+static int talitos_cra_init(struct crypto_tfm *tfm)
+{
+ struct crypto_alg *alg = tfm->__crt_alg;
+ struct talitos_crypto_alg *talitos_alg;
+ struct talitos_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ if ((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_AHASH)
+ talitos_alg = container_of(__crypto_ahash_alg(tfm),
+ struct talitos_crypto_alg,
+ algt.alg.hash);
+ else
+ talitos_alg = container_of(alg, struct talitos_crypto_alg,
+ algt.alg.crypto);
+
+ return talitos_init_common(ctx, talitos_alg);
+}
+
static int talitos_cra_init_aead(struct crypto_aead *tfm)
{
- talitos_cra_init(crypto_aead_tfm(tfm));
- return 0;
+ struct aead_alg *alg = crypto_aead_alg(tfm);
+ struct talitos_crypto_alg *talitos_alg;
+ talitos_alg = container_of(alg,
+ struct talitos_crypto_alg,
+ algt.alg.aead);
+ struct talitos_ctx *ctx = crypto_aead_ctx(tfm);
+
+ return talitos_init_common(ctx, talitos_alg);
}
static int talitos_cra_init_ahash(struct crypto_tfm *tfm)
--
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