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

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Date:   Tue, 17 Sep 2019 11:11:07 -0700
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     zhong jiang <zhongjiang@...wei.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 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?

> 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;