linux-kernel - [PATCH 1/3] crypto: atmel - use memzero

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Date:   Fri, 26 Mar 2021 09:20:46 +0800
From:   Kai Ye <yekai13@...wei.com>
To:     <herbert@...dor.apana.org.au>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <wangzhou1@...ilicon.com>, <yekai13@...wei.com>
Subject: [PATCH 1/3] crypto: atmel - use memzero_explicit() for clearing data

use memzero_explicit instead of memset to clear sensitive data, such as key.

Signed-off-by: Kai Ye <yekai13@...wei.com>
---
 drivers/crypto/atmel-sha.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/atmel-sha.c b/drivers/crypto/atmel-sha.c
index 352d80c..4a08b2a 100644
--- a/drivers/crypto/atmel-sha.c
+++ b/drivers/crypto/atmel-sha.c
@@ -1622,7 +1622,7 @@ static inline void atmel_sha_hmac_key_init(struct atmel_sha_hmac_key *hkey)
 static inline void atmel_sha_hmac_key_release(struct atmel_sha_hmac_key *hkey)
 {
 	kfree(hkey->keydup);
-	memset(hkey, 0, sizeof(*hkey));
+	memzero_explicit(hkey, sizeof(*hkey));
 }
 
 static inline int atmel_sha_hmac_key_set(struct atmel_sha_hmac_key *hkey,
-- 
2.8.1