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Message-ID: <4206a7e79f32538e2505722ef4b57386@linux.ibm.com>
Date: Mon, 17 Jul 2023 12:47:00 +0200
From: Harald Freudenberger <freude@...ux.ibm.com>
To: Wang Ming <machel@...o.com>
Cc: 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, linux-s390@...r.kernel.org,
linux-kernel@...r.kernel.org, opensource.kernel@...o.com
Subject: Re: [PATCH v1] arch: s390: Use kfree_sensitive instead of kfree
On 2023-07-17 11:45, Wang Ming wrote:
> key might contain private part of the key, so better use
> kfree_sensitive to free it.
>
> Signed-off-by: Wang Ming <machel@...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 d29a9d908797..38349150c96e 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;
> }
> }
Reviewed-by: Harald Freudenberger <freude@...ux.ibm.com>
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