[PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation

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* [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
@ 2019-07-03 16:27 Fuqian Huang
  2019-07-03 17:10 ` Horia Geanta
                   ` (5 more replies)
  0 siblings, 6 replies; 8+ messages in thread
From: Fuqian Huang @ 2019-07-03 16:27 UTC (permalink / raw)
  Cc: Horia Geantă, Aymen Sghaier, Herbert Xu, David S . Miller,
	Gonglei, Michael S . Tsirkin, Jason Wang, linux-crypto,
	linux-kernel, virtualization, Fuqian Huang

kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
---
Changes in v2:
  - Fix a typo in commit message (memset -> memcpy)

 drivers/crypto/caam/caampkc.c              | 11 +++--------
 drivers/crypto/virtio/virtio_crypto_algs.c |  4 +---
 2 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index fe24485274e1..a03464b4c019 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -816,7 +816,7 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
 		return ret;
 
 	/* Copy key in DMA zone */
-	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
+	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
 	if (!rsa_key->e)
 		goto err;
 
@@ -838,8 +838,6 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
 	rsa_key->e_sz = raw_key.e_sz;
 	rsa_key->n_sz = raw_key.n_sz;
 
-	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
-
 	return 0;
 err:
 	caam_rsa_free_key(rsa_key);
@@ -920,11 +918,11 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
 		return ret;
 
 	/* Copy key in DMA zone */
-	rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL);
+	rsa_key->d = kmemdup(raw_key.d, raw_key.d_sz, GFP_DMA | GFP_KERNEL);
 	if (!rsa_key->d)
 		goto err;
 
-	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
+	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
 	if (!rsa_key->e)
 		goto err;
 
@@ -947,9 +945,6 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
 	rsa_key->e_sz = raw_key.e_sz;
 	rsa_key->n_sz = raw_key.n_sz;
 
-	memcpy(rsa_key->d, raw_key.d, raw_key.d_sz);
-	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
-
 	caam_rsa_set_priv_key_form(ctx, &raw_key);
 
 	return 0;
diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
index 10f266d462d6..42d19205166b 100644
--- a/drivers/crypto/virtio/virtio_crypto_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_algs.c
@@ -129,13 +129,11 @@ static int virtio_crypto_alg_ablkcipher_init_session(
 	 * Avoid to do DMA from the stack, switch to using
 	 * dynamically-allocated for the key
 	 */
-	uint8_t *cipher_key = kmalloc(keylen, GFP_ATOMIC);
+	uint8_t *cipher_key = kmemdup(key, keylen, GFP_ATOMIC);
 
 	if (!cipher_key)
 		return -ENOMEM;
 
-	memcpy(cipher_key, key, keylen);
-
 	spin_lock(&vcrypto->ctrl_lock);
 	/* Pad ctrl header */
 	vcrypto->ctrl.header.opcode =
-- 
2.11.0


^ permalink raw reply related	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
  2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
@ 2019-07-03 17:10 ` Horia Geanta
  2019-07-03 17:10 ` Horia Geanta
                   ` (4 subsequent siblings)
  5 siblings, 0 replies; 8+ messages in thread
From: Horia Geanta @ 2019-07-03 17:10 UTC (permalink / raw)
  To: Fuqian Huang
  Cc: Aymen Sghaier, Herbert Xu, Michael S . Tsirkin,
	linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	linux-crypto@vger.kernel.org, David S . Miller

On 7/3/2019 7:27 PM, Fuqian Huang wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>

Thanks,
Horia

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
  2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
  2019-07-03 17:10 ` Horia Geanta
@ 2019-07-03 17:10 ` Horia Geanta
  2019-07-03 18:51 ` Michael S. Tsirkin
                   ` (3 subsequent siblings)
  5 siblings, 0 replies; 8+ messages in thread
From: Horia Geanta @ 2019-07-03 17:10 UTC (permalink / raw)
  To: Fuqian Huang
  Cc: Aymen Sghaier, Herbert Xu, David S . Miller, Gonglei,
	Michael S . Tsirkin, Jason Wang, linux-crypto@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org

On 7/3/2019 7:27 PM, Fuqian Huang wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>

Thanks,
Horia

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
  2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
  2019-07-03 17:10 ` Horia Geanta
  2019-07-03 17:10 ` Horia Geanta
@ 2019-07-03 18:51 ` Michael S. Tsirkin
  2019-07-03 18:51 ` Michael S. Tsirkin
                   ` (2 subsequent siblings)
  5 siblings, 0 replies; 8+ messages in thread
From: Michael S. Tsirkin @ 2019-07-03 18:51 UTC (permalink / raw)
  To: Fuqian Huang
  Cc: Horia Geantă, Aymen Sghaier, Herbert Xu, David S . Miller,
	Gonglei, Jason Wang, linux-crypto, linux-kernel, virtualization

On Thu, Jul 04, 2019 at 12:27:08AM +0800, Fuqian Huang wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>

virtio part:

Acked-by: Michael S. Tsirkin <mst@redhat.com>


> ---
> Changes in v2:
>   - Fix a typo in commit message (memset -> memcpy)
> 
>  drivers/crypto/caam/caampkc.c              | 11 +++--------
>  drivers/crypto/virtio/virtio_crypto_algs.c |  4 +---
>  2 files changed, 4 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
> index fe24485274e1..a03464b4c019 100644
> --- a/drivers/crypto/caam/caampkc.c
> +++ b/drivers/crypto/caam/caampkc.c
> @@ -816,7 +816,7 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
>  		return ret;
>  
>  	/* Copy key in DMA zone */
> -	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
> +	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
>  	if (!rsa_key->e)
>  		goto err;
>  
> @@ -838,8 +838,6 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
>  	rsa_key->e_sz = raw_key.e_sz;
>  	rsa_key->n_sz = raw_key.n_sz;
>  
> -	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
> -
>  	return 0;
>  err:
>  	caam_rsa_free_key(rsa_key);
> @@ -920,11 +918,11 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
>  		return ret;
>  
>  	/* Copy key in DMA zone */
> -	rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL);
> +	rsa_key->d = kmemdup(raw_key.d, raw_key.d_sz, GFP_DMA | GFP_KERNEL);
>  	if (!rsa_key->d)
>  		goto err;
>  
> -	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
> +	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
>  	if (!rsa_key->e)
>  		goto err;
>  
> @@ -947,9 +945,6 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
>  	rsa_key->e_sz = raw_key.e_sz;
>  	rsa_key->n_sz = raw_key.n_sz;
>  
> -	memcpy(rsa_key->d, raw_key.d, raw_key.d_sz);
> -	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
> -
>  	caam_rsa_set_priv_key_form(ctx, &raw_key);
>  
>  	return 0;
> diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
> index 10f266d462d6..42d19205166b 100644
> --- a/drivers/crypto/virtio/virtio_crypto_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_algs.c
> @@ -129,13 +129,11 @@ static int virtio_crypto_alg_ablkcipher_init_session(
>  	 * Avoid to do DMA from the stack, switch to using
>  	 * dynamically-allocated for the key
>  	 */
> -	uint8_t *cipher_key = kmalloc(keylen, GFP_ATOMIC);
> +	uint8_t *cipher_key = kmemdup(key, keylen, GFP_ATOMIC);
>  
>  	if (!cipher_key)
>  		return -ENOMEM;
>  
> -	memcpy(cipher_key, key, keylen);
> -
>  	spin_lock(&vcrypto->ctrl_lock);
>  	/* Pad ctrl header */
>  	vcrypto->ctrl.header.opcode =
> -- 
> 2.11.0

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
  2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
                   ` (2 preceding siblings ...)
  2019-07-03 18:51 ` Michael S. Tsirkin
@ 2019-07-03 18:51 ` Michael S. Tsirkin
  2019-07-26 12:32 ` Herbert Xu
  2019-07-26 12:32 ` Herbert Xu
  5 siblings, 0 replies; 8+ messages in thread
From: Michael S. Tsirkin @ 2019-07-03 18:51 UTC (permalink / raw)
  To: Fuqian Huang
  Cc: Aymen Sghaier, Herbert Xu, Horia Geantă, linux-kernel,
	virtualization, linux-crypto, David S . Miller

On Thu, Jul 04, 2019 at 12:27:08AM +0800, Fuqian Huang wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>

virtio part:

Acked-by: Michael S. Tsirkin <mst@redhat.com>


> ---
> Changes in v2:
>   - Fix a typo in commit message (memset -> memcpy)
> 
>  drivers/crypto/caam/caampkc.c              | 11 +++--------
>  drivers/crypto/virtio/virtio_crypto_algs.c |  4 +---
>  2 files changed, 4 insertions(+), 11 deletions(-)
> 
> diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
> index fe24485274e1..a03464b4c019 100644
> --- a/drivers/crypto/caam/caampkc.c
> +++ b/drivers/crypto/caam/caampkc.c
> @@ -816,7 +816,7 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
>  		return ret;
>  
>  	/* Copy key in DMA zone */
> -	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
> +	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
>  	if (!rsa_key->e)
>  		goto err;
>  
> @@ -838,8 +838,6 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
>  	rsa_key->e_sz = raw_key.e_sz;
>  	rsa_key->n_sz = raw_key.n_sz;
>  
> -	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
> -
>  	return 0;
>  err:
>  	caam_rsa_free_key(rsa_key);
> @@ -920,11 +918,11 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
>  		return ret;
>  
>  	/* Copy key in DMA zone */
> -	rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL);
> +	rsa_key->d = kmemdup(raw_key.d, raw_key.d_sz, GFP_DMA | GFP_KERNEL);
>  	if (!rsa_key->d)
>  		goto err;
>  
> -	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
> +	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
>  	if (!rsa_key->e)
>  		goto err;
>  
> @@ -947,9 +945,6 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
>  	rsa_key->e_sz = raw_key.e_sz;
>  	rsa_key->n_sz = raw_key.n_sz;
>  
> -	memcpy(rsa_key->d, raw_key.d, raw_key.d_sz);
> -	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
> -
>  	caam_rsa_set_priv_key_form(ctx, &raw_key);
>  
>  	return 0;
> diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
> index 10f266d462d6..42d19205166b 100644
> --- a/drivers/crypto/virtio/virtio_crypto_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_algs.c
> @@ -129,13 +129,11 @@ static int virtio_crypto_alg_ablkcipher_init_session(
>  	 * Avoid to do DMA from the stack, switch to using
>  	 * dynamically-allocated for the key
>  	 */
> -	uint8_t *cipher_key = kmalloc(keylen, GFP_ATOMIC);
> +	uint8_t *cipher_key = kmemdup(key, keylen, GFP_ATOMIC);
>  
>  	if (!cipher_key)
>  		return -ENOMEM;
>  
> -	memcpy(cipher_key, key, keylen);
> -
>  	spin_lock(&vcrypto->ctrl_lock);
>  	/* Pad ctrl header */
>  	vcrypto->ctrl.header.opcode =
> -- 
> 2.11.0

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
  2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
                   ` (3 preceding siblings ...)
  2019-07-03 18:51 ` Michael S. Tsirkin
@ 2019-07-26 12:32 ` Herbert Xu
  2019-07-26 12:32 ` Herbert Xu
  5 siblings, 0 replies; 8+ messages in thread
From: Herbert Xu @ 2019-07-26 12:32 UTC (permalink / raw)
  To: Fuqian Huang

Fuqian Huang <huangfq.daxian@gmail.com> wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
> ---
> Changes in v2:
>  - Fix a typo in commit message (memset -> memcpy)
> 
> drivers/crypto/caam/caampkc.c              | 11 +++--------
> drivers/crypto/virtio/virtio_crypto_algs.c |  4 +---
> 2 files changed, 4 insertions(+), 11 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
  2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
                   ` (4 preceding siblings ...)
  2019-07-26 12:32 ` Herbert Xu
@ 2019-07-26 12:32 ` Herbert Xu
  5 siblings, 0 replies; 8+ messages in thread
From: Herbert Xu @ 2019-07-26 12:32 UTC (permalink / raw)
  Cc: aymen.sghaier, horia.geanta, mst, linux-kernel, virtualization,
	linux-crypto, huangfq.daxian, davem

Fuqian Huang <huangfq.daxian@gmail.com> wrote:
> kmemdup is introduced to duplicate a region of memory in a neat way.
> Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
> write the size twice (sometimes lead to mistakes), kmemdup improves
> readability, leads to smaller code and also reduce the chances of mistakes.
> Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.
> 
> Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
> ---
> Changes in v2:
>  - Fix a typo in commit message (memset -> memcpy)
> 
> drivers/crypto/caam/caampkc.c              | 11 +++--------
> drivers/crypto/virtio/virtio_crypto_algs.c |  4 +---
> 2 files changed, 4 insertions(+), 11 deletions(-)

Patch applied.  Thanks.
-- 
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

^ permalink raw reply	[flat|nested] 8+ messages in thread

* [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation
@ 2019-07-03 16:27 Fuqian Huang
  0 siblings, 0 replies; 8+ messages in thread
From: Fuqian Huang @ 2019-07-03 16:27 UTC (permalink / raw)
  Cc: Aymen Sghaier, Herbert Xu, Horia Geantă, Michael S . Tsirkin,
	linux-kernel, virtualization, linux-crypto, Fuqian Huang,
	David S . Miller

kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memcpy, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memcpy.

Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
---
Changes in v2:
  - Fix a typo in commit message (memset -> memcpy)

 drivers/crypto/caam/caampkc.c              | 11 +++--------
 drivers/crypto/virtio/virtio_crypto_algs.c |  4 +---
 2 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c
index fe24485274e1..a03464b4c019 100644
--- a/drivers/crypto/caam/caampkc.c
+++ b/drivers/crypto/caam/caampkc.c
@@ -816,7 +816,7 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
 		return ret;
 
 	/* Copy key in DMA zone */
-	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
+	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
 	if (!rsa_key->e)
 		goto err;
 
@@ -838,8 +838,6 @@ static int caam_rsa_set_pub_key(struct crypto_akcipher *tfm, const void *key,
 	rsa_key->e_sz = raw_key.e_sz;
 	rsa_key->n_sz = raw_key.n_sz;
 
-	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
-
 	return 0;
 err:
 	caam_rsa_free_key(rsa_key);
@@ -920,11 +918,11 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
 		return ret;
 
 	/* Copy key in DMA zone */
-	rsa_key->d = kzalloc(raw_key.d_sz, GFP_DMA | GFP_KERNEL);
+	rsa_key->d = kmemdup(raw_key.d, raw_key.d_sz, GFP_DMA | GFP_KERNEL);
 	if (!rsa_key->d)
 		goto err;
 
-	rsa_key->e = kzalloc(raw_key.e_sz, GFP_DMA | GFP_KERNEL);
+	rsa_key->e = kmemdup(raw_key.e, raw_key.e_sz, GFP_DMA | GFP_KERNEL);
 	if (!rsa_key->e)
 		goto err;
 
@@ -947,9 +945,6 @@ static int caam_rsa_set_priv_key(struct crypto_akcipher *tfm, const void *key,
 	rsa_key->e_sz = raw_key.e_sz;
 	rsa_key->n_sz = raw_key.n_sz;
 
-	memcpy(rsa_key->d, raw_key.d, raw_key.d_sz);
-	memcpy(rsa_key->e, raw_key.e, raw_key.e_sz);
-
 	caam_rsa_set_priv_key_form(ctx, &raw_key);
 
 	return 0;
diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c
index 10f266d462d6..42d19205166b 100644
--- a/drivers/crypto/virtio/virtio_crypto_algs.c
+++ b/drivers/crypto/virtio/virtio_crypto_algs.c
@@ -129,13 +129,11 @@ static int virtio_crypto_alg_ablkcipher_init_session(
 	 * Avoid to do DMA from the stack, switch to using
 	 * dynamically-allocated for the key
 	 */
-	uint8_t *cipher_key = kmalloc(keylen, GFP_ATOMIC);
+	uint8_t *cipher_key = kmemdup(key, keylen, GFP_ATOMIC);
 
 	if (!cipher_key)
 		return -ENOMEM;
 
-	memcpy(cipher_key, key, keylen);
-
 	spin_lock(&vcrypto->ctrl_lock);
 	/* Pad ctrl header */
 	vcrypto->ctrl.header.opcode =
-- 
2.11.0

^ permalink raw reply related	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2019-07-26 12:32 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
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2019-07-03 16:27 [PATCH v2 06/35] crypto: Use kmemdup rather than duplicating its implementation Fuqian Huang
2019-07-03 17:10 ` Horia Geanta
2019-07-03 17:10 ` Horia Geanta
2019-07-03 18:51 ` Michael S. Tsirkin
2019-07-03 18:51 ` Michael S. Tsirkin
2019-07-26 12:32 ` Herbert Xu
2019-07-26 12:32 ` Herbert Xu
  -- strict thread matches above, loose matches on Subject: below --
2019-07-03 16:27 Fuqian Huang

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