linux-kernel - [PATCH v2 4/4] crypto: sun8i-ss

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Date:   Thu, 27 Aug 2020 09:44:02 +0300
From:   Denis Efremov <efremov@...ux.com>
To:     linux-crypto@...r.kernel.org
Cc:     Denis Efremov <efremov@...ux.com>,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/4] crypto: sun8i-ss - use kfree_sensitive()

Use kfree_sensitive() instead of open-coding it.

Signed-off-by: Denis Efremov <efremov@...ux.com>
---
 .../crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c   | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index 7b39b4495571..deb8b39a86db 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -368,10 +368,7 @@ void sun8i_ss_cipher_exit(struct crypto_tfm *tfm)
 {
 	struct sun8i_cipher_tfm_ctx *op = crypto_tfm_ctx(tfm);
 
-	if (op->key) {
-		memzero_explicit(op->key, op->keylen);
-		kfree(op->key);
-	}
+	kfree_sensitive(op->key);
 	crypto_free_skcipher(op->fallback_tfm);
 	pm_runtime_put_sync(op->ss->dev);
 }
@@ -393,10 +390,7 @@ int sun8i_ss_aes_setkey(struct crypto_skcipher *tfm, const u8 *key,
 		dev_dbg(ss->dev, "ERROR: Invalid keylen %u\n", keylen);
 		return -EINVAL;
 	}
-	if (op->key) {
-		memzero_explicit(op->key, op->keylen);
-		kfree(op->key);
-	}
+	kfree_sensitive(op->key);
 	op->keylen = keylen;
 	op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA);
 	if (!op->key)
@@ -419,10 +413,7 @@ int sun8i_ss_des3_setkey(struct crypto_skcipher *tfm, const u8 *key,
 		return -EINVAL;
 	}
 
-	if (op->key) {
-		memzero_explicit(op->key, op->keylen);
-		kfree(op->key);
-	}
+	kfree_sensitive(op->key);
 	op->keylen = keylen;
 	op->key = kmemdup(key, keylen, GFP_KERNEL | GFP_DMA);
 	if (!op->key)
-- 
2.26.2