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crypto: drivers - Use kmemdup rather than duplicating its implementation

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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>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Fuqian Huang 2019-07-04 00:27:08 +08:00 committed by Herbert Xu
parent 97bcb16199
commit cc2a58f14f
2 changed files with 4 additions and 11 deletions
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11
drivers/crypto/caam/caampkc.c
View File

@ -867,7 +867,7 @@ 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;
@ -889,8 +889,6 @@ 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);
@ -971,11 +969,11 @@ 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;
@ -998,9 +996,6 @@ 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;

4
drivers/crypto/virtio/virtio_crypto_algs.c
View File

@ -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 =