linux-kernel - Re: [RESENT PATCH v2] ixgbe: Use memzero

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Date:   Wed, 18 Sep 2019 09:34:56 +0800
From:   zhong jiang <zhongjiang@...wei.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
CC:     <davem@...emloft.net>, <anna.schumaker@...app.com>,
        <trond.myklebust@...merspace.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [RESENT PATCH v2] ixgbe: Use memzero_explicit directly in crypto
 cases

On 2019/9/18 2:11, Jakub Kicinski wrote:
> On Tue, 17 Sep 2019 22:44:22 +0800, zhong jiang wrote:
>> It's better to use memzero_explicit() to replace memset() in crypto cases.
>>
>> Signed-off-by: zhong jiang <zhongjiang@...wei.com>
> Thank you for the follow up! Your previous patch to use kzfree() 
> has been applied on its own merit, could you rebase this one on top 
> of current net-next/master?
I will do that.

Thanks,
zhong jiang
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
>> index 31629fc..7e4f32f 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_ipsec.c
>> @@ -960,10 +960,10 @@ int ixgbe_ipsec_vf_add_sa(struct ixgbe_adapter *adapter, u32 *msgbuf, u32 vf)
>>  	return 0;
>>  
>>  err_aead:
>> -	memset(xs->aead, 0, sizeof(*xs->aead));
>> +	memzero_explicit(xs->aead, sizeof(*xs->aead));
>>  	kfree(xs->aead);
>>  err_xs:
>> -	memset(xs, 0, sizeof(*xs));
>> +	memzero_explicit(xs, sizeof(*xs));
>>  	kfree(xs);
>>  err_out:
>>  	msgbuf[1] = err;
>> @@ -1049,7 +1049,7 @@ 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 */
>> -	memset(xs, 0, sizeof(*xs));
>> +	memzero_explicit(xs, sizeof(*xs));
>>  	kfree(xs);
>>  
>>  	return 0;
>
> .
>