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[90.63.244.31]) by smtp.googlemail.com with ESMTPSA id r4-20020a05600c35c400b00389f368cf1esm3695424wmq.40.2022.03.17.13.56.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Mar 2022 13:56:14 -0700 (PDT) From: Corentin Labbe 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 Subject: [PATCH 05/19] crypto: sun8i-ss: handle zero sized sg Date: Thu, 17 Mar 2022 20:55:51 +0000 Message-Id: <20220317205605.3924836-6-clabbe@baylibre.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220317205605.3924836-1-clabbe@baylibre.com> References: <20220317205605.3924836-1-clabbe@baylibre.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220317_135616_218154_A9AD399C X-CRM114-Status: GOOD ( 11.50 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org sun8i-ss does not handle well the possible zero sized sg. Fixes: d9b45418a917 ("crypto: sun8i-ss - support hash algorithms") Signed-off-by: Corentin Labbe --- 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); -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel