linux-kernel - [PATCH review for 4.9 02/50] crypto: ccp - Set the AES size field for all modes

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Date:   Sat, 7 Oct 2017 22:36:46 +0000
From:   "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Cc:     Gary R Hook <gary.hook@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "Levin, Alexander (Sasha Levin)" <alexander.levin@...izon.com>
Subject: [PATCH review for 4.9 02/50] crypto: ccp - Set the AES size field for
 all modes

From: Gary R Hook <gary.hook@....com>

[ Upstream commit f7cc02b3c3a33a10dd5bb9e5dfd22e47e09503a2 ]

Ensure that the size field is correctly populated for
all AES modes.

Signed-off-by: Gary R Hook <gary.hook@....com>
Signed-off-by: Herbert Xu <herbert@...dor.apana.org.au>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
---
 drivers/crypto/ccp/ccp-dev-v5.c | 3 +--
 drivers/crypto/ccp/ccp-dev.h    | 1 +
 drivers/crypto/ccp/ccp-ops.c    | 8 ++++++++
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/ccp/ccp-dev-v5.c b/drivers/crypto/ccp/ccp-dev-v5.c
index 17b19a68e269..71980c41283b 100644
--- a/drivers/crypto/ccp/ccp-dev-v5.c
+++ b/drivers/crypto/ccp/ccp-dev-v5.c
@@ -278,8 +278,7 @@ static int ccp5_perform_aes(struct ccp_op *op)
 	CCP_AES_ENCRYPT(&function) = op->u.aes.action;
 	CCP_AES_MODE(&function) = op->u.aes.mode;
 	CCP_AES_TYPE(&function) = op->u.aes.type;
-	if (op->u.aes.mode == CCP_AES_MODE_CFB)
-		CCP_AES_SIZE(&function) = 0x7f;
+	CCP_AES_SIZE(&function) = op->u.aes.size;
 
 	CCP5_CMD_FUNCTION(&desc) = function.raw;
 
diff --git a/drivers/crypto/ccp/ccp-dev.h b/drivers/crypto/ccp/ccp-dev.h
index e23c36c7691c..347b77108baa 100644
--- a/drivers/crypto/ccp/ccp-dev.h
+++ b/drivers/crypto/ccp/ccp-dev.h
@@ -470,6 +470,7 @@ struct ccp_aes_op {
 	enum ccp_aes_type type;
 	enum ccp_aes_mode mode;
 	enum ccp_aes_action action;
+	unsigned int size;
 };
 
 struct ccp_xts_aes_op {
diff --git a/drivers/crypto/ccp/ccp-ops.c b/drivers/crypto/ccp/ccp-ops.c
index 64deb006c3be..7d4cd518e602 100644
--- a/drivers/crypto/ccp/ccp-ops.c
+++ b/drivers/crypto/ccp/ccp-ops.c
@@ -692,6 +692,14 @@ static int ccp_run_aes_cmd(struct ccp_cmd_queue *cmd_q, struct ccp_cmd *cmd)
 			goto e_ctx;
 		}
 	}
+	switch (aes->mode) {
+	case CCP_AES_MODE_CFB: /* CFB128 only */
+	case CCP_AES_MODE_CTR:
+		op.u.aes.size = AES_BLOCK_SIZE * BITS_PER_BYTE - 1;
+		break;
+	default:
+		op.u.aes.size = 0;
+	}
 
 	/* Prepare the input and output data workareas. For in-place
 	 * operations we need to set the dma direction to BIDIRECTIONAL
-- 
2.11.0