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From: Corentin Labbe <clabbe@baylibre.com>
To: herbert@gondor.apana.org.au, jernej.skrabec@gmail.com,
	samuel@sholland.org, wens@csie.org
Cc: linux-arm-kernel@lists.infradead.org,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-sunxi@lists.linux.dev, Corentin Labbe <clabbe@baylibre.com>
Subject: [PATCH v2 05/19] crypto: sun8i-ss: handle zero sized sg
Date: Mon,  2 May 2022 20:19:15 +0000	[thread overview]
Message-ID: <20220502201929.843194-6-clabbe@baylibre.com> (raw)
In-Reply-To: <20220502201929.843194-1-clabbe@baylibre.com>

sun8i-ss does not handle well the possible zero sized sg.

Fixes: d9b45418a917 ("crypto: sun8i-ss - support hash algorithms")
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
index 1a71ed49d233..ca4f280af35d 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-hash.c
@@ -380,13 +380,21 @@ int sun8i_ss_hash_run(struct crypto_engine *engine, void *breq)
 	}
 
 	len = areq->nbytes;
-	for_each_sg(areq->src, sg, nr_sgs, i) {
+	sg = areq->src;
+	i = 0;
+	while (len > 0 && sg) {
+		if (sg_dma_len(sg) == 0) {
+			sg = sg_next(sg);
+			continue;
+		}
 		rctx->t_src[i].addr = sg_dma_address(sg);
 		todo = min(len, sg_dma_len(sg));
 		rctx->t_src[i].len = todo / 4;
 		len -= todo;
 		rctx->t_dst[i].addr = addr_res;
 		rctx->t_dst[i].len = digestsize / 4;
+		sg = sg_next(sg);
+		i++;
 	}
 	if (len > 0) {
 		dev_err(ss->dev, "remaining len %d\n", len);
-- 
2.35.1


  parent reply	other threads:[~2022-05-02 20:19 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-02 20:19 [PATCH v2 00/19] crypto: allwinner: lots of fixes Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 01/19] crypto: sun8i-ce: Fix minor style issue Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 02/19] crypto: sun8i-ce: do not allocate memory when handling requests Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 03/19] crypto: sun4i-ss: do not allocate backup IV on requests Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 04/19] crypto: sun8i-ss: rework handling of IV Corentin Labbe
2022-05-02 20:19 ` Corentin Labbe [this message]
2022-05-02 20:19 ` [PATCH v2 06/19] crypto: sun8i-ss: remove redundant test Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 07/19] crypto: sun8i-ss: test error before assigning Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 08/19] crypto: sun8i-ss: use sg_nents_for_len Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 09/19] crypto: sun8i-ss: do not allocate memory when handling hash requests Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 10/19] crypto: sun8i-ss: do not zeroize all pad Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 11/19] crypto: sun8i-ss: handle requests if last block is not modulo 64 Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 12/19] crypto: sun8i-ss: rework debugging Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 13/19] crypto: sun8i-ss: Add function for handling hash padding Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 14/19] crypto: sun8i-ss: add hmac(sha1) Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 15/19] crypto: sun8i-ss: do not fallback if cryptlen is less than sg length Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 16/19] crypto: sun8i-ce: Add function for handling hash padding Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 17/19] crypto: sun8i-ce: use sg_nents_for_len Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 18/19] crypto: sun8i-ce: rework debugging Corentin Labbe
2022-05-02 20:19 ` [PATCH v2 19/19] crypto: sun8i-ce: do not fallback if cryptlen is less than sg length Corentin Labbe
2022-05-13  9:34 ` [PATCH v2 00/19] crypto: allwinner: lots of fixes Herbert Xu

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