2013-03-04 16:45:32

by Kent Yoder

Subject: [PATCH] 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 <[email protected]>
---
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

2013-03-05 00:34:59

by Greg Kroah-Hartman

Subject: Re: [PATCH] drivers/crypto/nx: fix init race, alignmasks and GCM bug

On Mon, Mar 04, 2013 at 10:44:57AM -0600, Kent Yoder wrote:
> 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 <[email protected]>
> ---
> 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(-)


<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read Documentation/stable_kernel_rules.txt
for how to do this properly.

</formletter>