[PATCH] crypto/ccp - Fill the result buffer only on digest, finup, and final ops

[Gary R Hook]

Any change to the result buffer should only happen on final, finup
and digest operations. Changes to the buffer for update, import, export,
etc, are not allowed.

Fixes: 66d7b9f6175e ("crypto: testmgr - test misuse of result in ahash")
Signed-off-by: Gary R Hook <gary.h...@amd.com>
Cc: <sta...@vger.kernel.org>
---
 0 files changed

diff --git a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c 
b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
index 60fc0fa26fd3..26687f318de6 100644
--- a/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
+++ b/drivers/crypto/ccp/ccp-crypto-aes-cmac.c
@@ -46,7 +46,7 @@ static int ccp_aes_cmac_complete(struct crypto_async_request 
*async_req,
        }
 
        /* Update result area if supplied */
-       if (req->result)
+       if (req->result && rctx->final)
                memcpy(req->result, rctx->iv, digest_size);
 
 e_free:
diff --git a/drivers/crypto/ccp/ccp-crypto-sha.c 
b/drivers/crypto/ccp/ccp-crypto-sha.c
index 8b9b16d433f7..871c9628a2ee 100644
--- a/drivers/crypto/ccp/ccp-crypto-sha.c
+++ b/drivers/crypto/ccp/ccp-crypto-sha.c
@@ -47,7 +47,7 @@ static int ccp_sha_complete(struct crypto_async_request 
*async_req, int ret)
        }
 
        /* Update result area if supplied */
-       if (req->result)
+       if (req->result && rctx->final)
                memcpy(req->result, rctx->ctx, digest_size);
 
 e_free: