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Message-ID: <20250716122023.67129-2-fourier.thomas@gmail.com>
Date: Wed, 16 Jul 2025 14:20:19 +0200
From: Thomas Fourier <fourier.thomas@...il.com>
To:
Cc: Thomas Fourier <fourier.thomas@...il.com>,
Daniele Alessandrelli <daniele.alessandrelli@...el.com>,
Declan Murphy <declan.murphy@...el.com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>,
Mark Gross <mgross@...ux.intel.com>,
linux-crypto@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: keembay - Add missing check after sg_nents_for_len()
sg_nents_for_len() returns an int which is negative in case of error.
Fixes: 472b04444cd3 ("crypto: keembay - Add Keem Bay OCS HCU driver")
Signed-off-by: Thomas Fourier <fourier.thomas@...il.com>
---
drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c b/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c
index 8f9e21ced0fe..c75fd7c68fd7 100644
--- a/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c
+++ b/drivers/crypto/intel/keembay/keembay-ocs-hcu-core.c
@@ -232,7 +232,7 @@ static int kmb_ocs_dma_prepare(struct ahash_request *req)
struct device *dev = rctx->hcu_dev->dev;
unsigned int remainder = 0;
unsigned int total;
- size_t nents;
+ int nents;
size_t count;
int rc;
int i;
@@ -253,6 +253,9 @@ static int kmb_ocs_dma_prepare(struct ahash_request *req)
/* Determine the number of scatter gather list entries to process. */
nents = sg_nents_for_len(req->src, rctx->sg_data_total - remainder);
+ if (nents < 0)
+ return -nents;
+
/* If there are entries to process, map them. */
if (nents) {
rctx->sg_dma_nents = dma_map_sg(dev, req->src, nents,
--
2.43.0
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