linux-kernel - Re: Fwd: [PATCH v2] drivers/crypto/nx: fix init race, alignmasks and GCM bug

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Date:	Wed, 10 Apr 2013 15:04:23 -0500
From:	Kent Yoder <shpedoikal@...il.com>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-crypto@...r.kernel.org
Subject: Re: Fwd: [PATCH v2] drivers/crypto/nx: fix init race, alignmasks and
 GCM bug

No problem, turns out I had a few more updates I needed to sneak into
the patch anyway.  Please see v3 in a new thread, applied to the
ppc-dev-next tree.

Thanks,
Kent

On Thu, Mar 28, 2013 at 1:24 PM, Benjamin Herrenschmidt
<benh@...nel.crashing.org> wrote:
> On Thu, 2013-03-28 at 11:32 -0500, Kent Yoder wrote:
>> Hi Ben, will you carry this patch in the linuxppc-dev tree?
>
> I can but I'm on vacation until end of April roughly.
>
> Cheers,
> Ben.
>
>> Thanks,
>> Kent
>>
>> ---------- Forwarded message ----------
>> From: Kent Yoder <shpedoikal@...il.com>
>> Date: Wed, Mar 20, 2013 at 9:22 AM
>> Subject: [PATCH v2] drivers/crypto/nx: fix init race, alignmasks and GCM bug
>> To: linux-kernel@...r.kernel.org
>> Cc: linux-crypto@...r.kernel.org, Benjamin Herrenschmidt
>> <benh@...nel.crashing.org>
>>
>>
>>   Fixes a race on driver init with registering algorithms where the
>> driver status flag wasn't being set before self testing started.
>>
>>   Added the cra_alignmask field for CBC and ECB modes.
>>
>>   Fixed a bug in GCM where AES block size was being used instead of
>> authsize.
>>
>> Signed-off-by: Kent Yoder <key@...ux.vnet.ibm.com>
>> ---
>> Only changes in v2 were to leave stable off the cc and add Ben for PPC.
>>
>>  drivers/crypto/nx/nx-aes-cbc.c | 1 +
>>  drivers/crypto/nx/nx-aes-ecb.c | 1 +
>>  drivers/crypto/nx/nx-aes-gcm.c | 2 +-
>>  drivers/crypto/nx/nx.c         | 4 ++--
>>  4 files changed, 5 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/crypto/nx/nx-aes-cbc.c b/drivers/crypto/nx/nx-aes-cbc.c
>> index a76d4c4..35d483f 100644
>> --- a/drivers/crypto/nx/nx-aes-cbc.c
>> +++ b/drivers/crypto/nx/nx-aes-cbc.c
>> @@ -126,6 +126,7 @@ struct crypto_alg nx_cbc_aes_alg = {
>>         .cra_blocksize   = AES_BLOCK_SIZE,
>>         .cra_ctxsize     = sizeof(struct nx_crypto_ctx),
>>         .cra_type        = &crypto_blkcipher_type,
>> +       .cra_alignmask   = 0xf,
>>         .cra_module      = THIS_MODULE,
>>         .cra_init        = nx_crypto_ctx_aes_cbc_init,
>>         .cra_exit        = nx_crypto_ctx_exit,
>> diff --git a/drivers/crypto/nx/nx-aes-ecb.c b/drivers/crypto/nx/nx-aes-ecb.c
>> index ba5f161..7bbc9a8 100644
>> --- a/drivers/crypto/nx/nx-aes-ecb.c
>> +++ b/drivers/crypto/nx/nx-aes-ecb.c
>> @@ -123,6 +123,7 @@ struct crypto_alg nx_ecb_aes_alg = {
>>         .cra_priority    = 300,
>>         .cra_flags       = CRYPTO_ALG_TYPE_BLKCIPHER,
>>         .cra_blocksize   = AES_BLOCK_SIZE,
>> +       .cra_alignmask   = 0xf,
>>         .cra_ctxsize     = sizeof(struct nx_crypto_ctx),
>>         .cra_type        = &crypto_blkcipher_type,
>>         .cra_module      = THIS_MODULE,
>> diff --git a/drivers/crypto/nx/nx-aes-gcm.c b/drivers/crypto/nx/nx-aes-gcm.c
>> index c8109ed..6cca6c3 100644
>> --- a/drivers/crypto/nx/nx-aes-gcm.c
>> +++ b/drivers/crypto/nx/nx-aes-gcm.c
>> @@ -219,7 +219,7 @@ static int gcm_aes_nx_crypt(struct aead_request
>> *req, int enc)
>>         if (enc)
>>                 NX_CPB_FDM(csbcpb) |= NX_FDM_ENDE_ENCRYPT;
>>         else
>> -               nbytes -= AES_BLOCK_SIZE;
>> +               nbytes -= crypto_aead_authsize(crypto_aead_reqtfm(req));
>>
>>         csbcpb->cpb.aes_gcm.bit_length_data = nbytes * 8;
>>
>> diff --git a/drivers/crypto/nx/nx.c b/drivers/crypto/nx/nx.c
>> index c767f23..7621d05 100644
>> --- a/drivers/crypto/nx/nx.c
>> +++ b/drivers/crypto/nx/nx.c
>> @@ -454,6 +454,8 @@ static int nx_register_algs(void)
>>         if (rc)
>>                 goto out;
>>
>> +       nx_driver.of.status = NX_OKAY;
>> +
>>         rc = crypto_register_alg(&nx_ecb_aes_alg);
>>         if (rc)
>>                 goto out;
>> @@ -498,8 +500,6 @@ static int nx_register_algs(void)
>>         if (rc)
>>                 goto out_unreg_s512;
>>
>> -       nx_driver.of.status = NX_OKAY;
>> -
>>         goto out;
>>
>>  out_unreg_s512:
>> --
>> 1.7.11.7
>> --
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>
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