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From:   zhong jiang <zhongjiang@huawei.com>
To:     <jakub.kicinski@netronome.com>, <davem@davemloft.net>
CC:     <anna.schumaker@netapp.com>, <trond.myklebust@hammerspace.com>,
        <netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <zhongjiang@huawei.com>
Subject: [PATCH net-next] ixgbe: Use memzero_explicit directly in crypto cases
Date:   Wed, 18 Sep 2019 10:36:35 +0800
Message-ID: <1568774195-8677-1-git-send-email-zhongjiang@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

In general, Use kzfree() to replace memset() + kfree() is feasible and
resonable.  But It's btter to use memzero_explicit() to replace memset()
in crypto cases.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
index 113f608..7e4f32f 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
@@ -960,9 +960,11 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
 	return 0;
 
 err_aead:
-	kzfree(xs->aead);
+	memzero_explicit(xs->aead, sizeof(*xs->aead));
+	kfree(xs->aead);
 err_xs:
-	kzfree(xs);
+	memzero_explicit(xs, sizeof(*xs));
+	kfree(xs);
 err_out:
 	msgbuf[1] = err;
 	return err;
@@ -1047,7 +1049,8 @@ int ixgbe_ipsec_vf_del_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
 	ixgbe_ipsec_del_sa(xs);
 
 	/* remove the xs that was made-up in the add request */
-	kzfree(xs);
+	memzero_explicit(xs, sizeof(*xs));
+	kfree(xs);
 
 	return 0;
 }
-- 
1.7.12.4