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

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Message-ID: <CAM0nabE5yQB3xQuATiAEyt3Ahpqqh7EMNDxcnK2PgSUaNG1Y_A@mail.gmail.com>
Date:	Wed, 20 Mar 2013 09:22:03 -0500
From:	Kent Yoder <shpedoikal@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-crypto@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: [PATCH v2] drivers/crypto/nx: fix init race, alignmasks and GCM bug

  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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