diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2014-01-06 13:34:11 -0600 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-01-15 11:33:36 +0800 |
| commit | 393897c5156a415533ff85aa381458840417b032 (patch) | |
| tree | 352d1e73a038f3496814406f917690232772a609 /drivers/crypto/ccp/ccp-crypto-aes-cmac.c | |
| parent | 77dc4a51a9d3386c318c1622fc126964f7cb0ee2 (diff) | |
| download | op-kernel-dev-393897c5156a415533ff85aa381458840417b032.zip op-kernel-dev-393897c5156a415533ff85aa381458840417b032.tar.gz | |
crypto: ccp - Check for caller result area before using it
For a hash operation, the caller doesn't have to supply a result
area on every call so don't use it / update it if it hasn't
been supplied.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/ccp/ccp-crypto-aes-cmac.c')
| -rw-r--r-- | drivers/crypto/ccp/ccp-crypto-aes-cmac.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c index 646c8d1..c6b8f9e 100644 --- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c +++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c @@ -43,7 +43,9 @@ static int ccp_aes_cmac_complete(struct crypto_async_request *async_req, } else rctx->buf_count = 0; - memcpy(req->result, rctx->iv, digest_size); + /* Update result area if supplied */ + if (req->result) + memcpy(req->result, rctx->iv, digest_size); e_free: sg_free_table(&rctx->data_sg); |
