linux-kernel - Re: [PATCH v2 1/4] crypto: inside-secure

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Date:   Thu, 27 Aug 2020 16:52:21 +0200
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     Denis Efremov <efremov@...ux.com>, antoine.tenart@...tlin.com
Cc:     linux-crypto@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] crypto: inside-secure - use kfree_sensitive()

On Thu, Aug 27, 2020 at 09:43:59AM +0300, Denis Efremov wrote:
> Use kfree_sensitive() instead of open-coding it.
> 
> Signed-off-by: Denis Efremov <efremov@...ux.com>
> ---
>  drivers/crypto/inside-secure/safexcel_hash.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c
> index 16a467969d8e..5ffdc1cd5847 100644
> --- a/drivers/crypto/inside-secure/safexcel_hash.c
> +++ b/drivers/crypto/inside-secure/safexcel_hash.c
> @@ -1082,8 +1082,7 @@ static int safexcel_hmac_init_pad(struct ahash_request *areq,
>  		}
>  
>  		/* Avoid leaking */
> -		memzero_explicit(keydup, keylen);
> -		kfree(keydup);
> +		kfree_sensitive(keydup);
>  
>  		if (ret)
>  			return ret;
> -- 
> 2.26.2
> 

The maintainer of this driver was not TO/CC.

I Add him.

Regards