linux-kernel - [PATCH] crypto: sun8i-ss - remove redundant memzero

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Date:   Thu, 27 Aug 2020 10:40:23 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     Denis Efremov <efremov@...ux.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: sun8i-ss - remove redundant memzero_explicit()

Remove redundant memzero_explicit() in sun8i_ss_cipher() before calling
kfree_sensitive(). kfree_sensitive() will zero the memory with
memzero_explicit().

Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index deb8b39a86db..ed2a69f82e1c 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -248,7 +248,6 @@ static int sun8i_ss_cipher(struct skcipher_request *areq)
 			offset = areq->cryptlen - ivsize;
 			if (rctx->op_dir & SS_DECRYPTION) {
 				memcpy(areq->iv, backup_iv, ivsize);
-				memzero_explicit(backup_iv, ivsize);
 				kfree_sensitive(backup_iv);
 			} else {
 				scatterwalk_map_and_copy(areq->iv, areq->dst, offset,
-- 
2.26.2