linux-kernel - [PATCH v1] s390/crypto: use kfree_sensitive in _free_kb

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Message-Id: <20230717074112.6580-1-duminjie@vivo.com>
Date:   Mon, 17 Jul 2023 15:41:12 +0800
From:   Minjie Du <duminjie@...o.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Sven Schnelle <svens@...ux.ibm.com>,
        linux-crypto@...r.kernel.org (open list:CRYPTO API),
        linux-s390@...r.kernel.org (open list:S390 ARCHITECTURE),
        linux-kernel@...r.kernel.org (open list)
Cc:     opensource.kernel@...o.com, Minjie Du <duminjie@...o.com>
Subject: [PATCH v1] s390/crypto: use kfree_sensitive in _free_kb_keybuf()

key might contain private part of the key, so better use
kfree_sensitive to free it.


Signed-off-by: Minjie Du <duminjie@...o.com>
---
 arch/s390/crypto/paes_s390.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/crypto/paes_s390.c b/arch/s390/crypto/paes_s390.c
index d29a9d908..38349150c 100644
--- a/arch/s390/crypto/paes_s390.c
+++ b/arch/s390/crypto/paes_s390.c
@@ -103,7 +103,7 @@ static inline void _free_kb_keybuf(struct key_blob *kb)
 {
 	if (kb->key && kb->key != kb->keybuf
 	    && kb->keylen > sizeof(kb->keybuf)) {
-		kfree(kb->key);
+		kfree_sensitive(kb->key);
 		kb->key = NULL;
 	}
 }
-- 
2.39.0