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Message-Id: <20200807162010.18979-19-andrei.botila@oss.nxp.com>
Date: Fri, 7 Aug 2020 19:20:06 +0300
From: Andrei Botila <andrei.botila@....nxp.com>
To: Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>
Cc: linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
linux-s390@...r.kernel.org, x86@...nel.org,
linux-arm-kernel@...s.com, Andrei Botila <andrei.botila@....com>
Subject: [PATCH 18/22] crypto: hisilicon/sec - add check for xts input length equal to zero
From: Andrei Botila <andrei.botila@....com>
Standardize the way input lengths equal to 0 are handled in all skcipher
algorithms. All the algorithms return 0 for input lengths equal to zero.
Signed-off-by: Andrei Botila <andrei.botila@....com>
---
drivers/crypto/hisilicon/sec/sec_algs.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/crypto/hisilicon/sec/sec_algs.c b/drivers/crypto/hisilicon/sec/sec_algs.c
index 8ca945ac297e..419ec4f23164 100644
--- a/drivers/crypto/hisilicon/sec/sec_algs.c
+++ b/drivers/crypto/hisilicon/sec/sec_algs.c
@@ -723,6 +723,10 @@ static int sec_alg_skcipher_crypto(struct skcipher_request *skreq,
bool split = skreq->src != skreq->dst;
gfp_t gfp = skreq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
+ if (!skreq->cryptlen && (ctx->cipher_alg == SEC_C_AES_XTS_128 ||
+ ctx->cipher_alg == SEC_C_AES_XTS_256))
+ return 0;
+
mutex_init(&sec_req->lock);
sec_req->req_base = &skreq->base;
sec_req->err = 0;
--
2.17.1
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