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[71.163.245.5]) by smtp.googlemail.com with ESMTPSA id 17sm4496243qtu.23.2021.02.11.12.01.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Feb 2021 12:01:34 -0800 (PST) From: Thara Gopinath To: herbert@gondor.apana.org.au, davem@davemloft.net, bjorn.andersson@linaro.org Cc: ebiggers@google.com, ardb@kernel.org, sivaprak@codeaurora.org, linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 05/11] crypto: qce: skcipher: Return error for zero length messages Date: Thu, 11 Feb 2021 15:01:22 -0500 Message-Id: <20210211200128.2886388-6-thara.gopinath@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210211200128.2886388-1-thara.gopinath@linaro.org> References: <20210211200128.2886388-1-thara.gopinath@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org Crypto engine BAM dma does not support 0 length data. Return unsupported if zero length messages are passed for transformation. Signed-off-by: Thara Gopinath --- v5->v6: - Return 0 for zero length messages instead of -EOPNOTSUPP in the cipher algorithms as pointed out by Eric Biggers. drivers/crypto/qce/skcipher.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/crypto/qce/skcipher.c b/drivers/crypto/qce/skcipher.c index 8aeb741ca5a3..6b3dc3a9797c 100644 --- a/drivers/crypto/qce/skcipher.c +++ b/drivers/crypto/qce/skcipher.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -260,6 +261,10 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt) rctx->flags |= encrypt ? QCE_ENCRYPT : QCE_DECRYPT; keylen = IS_XTS(rctx->flags) ? ctx->enc_keylen >> 1 : ctx->enc_keylen; + /* CE does not handle 0 length messages */ + if (!req->cryptlen) + return 0; + /* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and * is not a multiple of it; pass such requests to the fallback */