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Sun, 24 Dec 2023 08:21:07 +0000 Received: from DM4PR11MB5327.namprd11.prod.outlook.com ([fe80::7c2e:5b95:fdc2:30e]) by DM4PR11MB5327.namprd11.prod.outlook.com ([fe80::7c2e:5b95:fdc2:30e%3]) with mapi id 15.20.7113.023; Sun, 24 Dec 2023 08:21:07 +0000 From: ovidiu.panait@windriver.com To: linux-crypto@vger.kernel.org Cc: herbert@gondor.apana.org.au, davem@davemloft.net, festevam@gmail.com Subject: [PATCH v2 05/14] crypto: sahara - fix processing hash requests with req->nbytes < sg->length Date: Sun, 24 Dec 2023 10:21:35 +0200 Message-Id: <20231224082144.3894863-6-ovidiu.panait@windriver.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231224082144.3894863-1-ovidiu.panait@windriver.com> References: <20231224082144.3894863-1-ovidiu.panait@windriver.com> X-ClientProxiedBy: VI1PR09CA0094.eurprd09.prod.outlook.com (2603:10a6:803:78::17) To DM4PR11MB5327.namprd11.prod.outlook.com (2603:10b6:5:392::22) Precedence: bulk X-Mailing-List: linux-crypto@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM4PR11MB5327:EE_|MN2PR11MB4693:EE_ X-MS-Office365-Filtering-Correlation-Id: 1b6187af-c075-430a-330f-08dc04594731 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Currently, when nbytes is less than sg->length, "Descriptor length" errors are encountered. To fix this, take the actual request size into account when populating the hw links. Fixes: 5a2bb93f5992 ("crypto: sahara - add support for SHA1/256") Signed-off-by: Ovidiu Panait --- drivers/crypto/sahara.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c index d49659db6a48..321c11050457 100644 --- a/drivers/crypto/sahara.c +++ b/drivers/crypto/sahara.c @@ -774,6 +774,7 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev, int start) { struct scatterlist *sg; + unsigned int len; unsigned int i; int ret; @@ -795,12 +796,14 @@ static int sahara_sha_hw_links_create(struct sahara_dev *dev, if (!ret) return -EFAULT; + len = rctx->total; for (i = start; i < dev->nb_in_sg + start; i++) { - dev->hw_link[i]->len = sg->length; + dev->hw_link[i]->len = min(len, sg->length); dev->hw_link[i]->p = sg->dma_address; if (i == (dev->nb_in_sg + start - 1)) { dev->hw_link[i]->next = 0; } else { + len -= min(len, sg->length); dev->hw_link[i]->next = dev->hw_phys_link[i + 1]; sg = sg_next(sg); }