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From:   Giovanni Cabiddu <giovanni.cabiddu@intel.com>
To:     herbert@gondor.apana.org.au
Cc:     linux-crypto@vger.kernel.org, qat-linux@intel.com,
        Adam Guerin <adam.guerin@intel.com>,
        Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Subject: [PATCH 3/3] crypto: qat - reduce size of mapped region
Date:   Mon,  4 Jan 2021 17:21:59 +0000
Message-Id: <20210104172159.15489-4-giovanni.cabiddu@intel.com>
In-Reply-To: <20210104172159.15489-1-giovanni.cabiddu@intel.com>
References: <20210104172159.15489-1-giovanni.cabiddu@intel.com>
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From: Adam Guerin <adam.guerin@intel.com>

Restrict size of field to what is required by the operation.

This issue was detected by smatch:

    drivers/crypto/qat/qat_common/qat_asym_algs.c:328 qat_dh_compute_value() error: dma_map_single_attrs() '&qat_req->in.dh.in.b' too small (8 vs 64)

Signed-off-by: Adam Guerin <adam.guerin@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
---
 drivers/crypto/qat/qat_common/qat_asym_algs.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/qat_asym_algs.c b/drivers/crypto/qat/qat_common/qat_asym_algs.c
index 2c863d25327a..b0b78445418b 100644
--- a/drivers/crypto/qat/qat_common/qat_asym_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_asym_algs.c
@@ -321,13 +321,13 @@ static int qat_dh_compute_value(struct kpp_request *req)
 	qat_req->out.dh.out_tab[1] = 0;
 	/* Mapping in.in.b or in.in_g2.xa is the same */
 	qat_req->phy_in = dma_map_single(dev, &qat_req->in.dh.in.b,
-					 sizeof(struct qat_dh_input_params),
+					 sizeof(qat_req->in.dh.in.b),
 					 DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, qat_req->phy_in)))
 		goto unmap_dst;
 
 	qat_req->phy_out = dma_map_single(dev, &qat_req->out.dh.r,
-					  sizeof(struct qat_dh_output_params),
+					  sizeof(qat_req->out.dh.r),
 					  DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, qat_req->phy_out)))
 		goto unmap_in_params;
@@ -716,13 +716,13 @@ static int qat_rsa_enc(struct akcipher_request *req)
 	qat_req->in.rsa.in_tab[3] = 0;
 	qat_req->out.rsa.out_tab[1] = 0;
 	qat_req->phy_in = dma_map_single(dev, &qat_req->in.rsa.enc.m,
-					 sizeof(struct qat_rsa_input_params),
+					 sizeof(qat_req->in.rsa.enc.m),
 					 DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, qat_req->phy_in)))
 		goto unmap_dst;
 
 	qat_req->phy_out = dma_map_single(dev, &qat_req->out.rsa.enc.c,
-					  sizeof(struct qat_rsa_output_params),
+					  sizeof(qat_req->out.rsa.enc.c),
 					  DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, qat_req->phy_out)))
 		goto unmap_in_params;
@@ -864,13 +864,13 @@ static int qat_rsa_dec(struct akcipher_request *req)
 		qat_req->in.rsa.in_tab[3] = 0;
 	qat_req->out.rsa.out_tab[1] = 0;
 	qat_req->phy_in = dma_map_single(dev, &qat_req->in.rsa.dec.c,
-					 sizeof(struct qat_rsa_input_params),
+					 sizeof(qat_req->in.rsa.dec.c),
 					 DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, qat_req->phy_in)))
 		goto unmap_dst;
 
 	qat_req->phy_out = dma_map_single(dev, &qat_req->out.rsa.dec.m,
-					  sizeof(struct qat_rsa_output_params),
+					  sizeof(qat_req->out.rsa.dec.m),
 					  DMA_TO_DEVICE);
 	if (unlikely(dma_mapping_error(dev, qat_req->phy_out)))
 		goto unmap_in_params;
-- 
2.29.2