From 4e53be21dd0315c00eaf40cc8f8c0facd4d9a6b2 Mon Sep 17 00:00:00 2001 From: Thomas Fourier Date: Mon, 28 Jul 2025 14:03:30 +0200 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 Signed-off-by: Herbert Xu --- 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 *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, -- 2.47.3