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Miller" , Mark Gross , linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] crypto: keembay - Add missing check after sg_nents_for_len() Date: Mon, 28 Jul 2025 14:03:30 +0200 Message-ID: <20250728120331.53342-3-fourier.thomas@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- 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..48281d882260 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 *re= q) struct device *dev =3D rctx->hcu_dev->dev; unsigned int remainder =3D 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 *re= q) /* Determine the number of scatter gather list entries to process. */ nents =3D sg_nents_for_len(req->src, rctx->sg_data_total - remainder); =20 + if (nents < 0) + return nents; + /* If there are entries to process, map them. */ if (nents) { rctx->sg_dma_nents =3D dma_map_sg(dev, req->src, nents, --=20 2.43.0