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Message-ID: <ZImNO0AijmNriZuL@gondor.apana.org.au>
Date: Wed, 14 Jun 2023 17:49:47 +0800
From: Herbert Xu <herbert@...dor.apana.org.au>
To: Mahmoud Adam <mngyadam@...zon.com>
Cc: dhowells@...hat.com, davem@...emloft.net, keyrings@...r.kernel.org,
linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] KEYS: use kfree_sensitive with key
On Tue, Jun 13, 2023 at 04:07:23PM +0000, Mahmoud Adam wrote:
> key member might contain private part of the key, so better use
> kfree_sensitive to free it
>
> Signed-off-by: Mahmoud Adam <mngyadam@...zon.com>
> ---
> crypto/asymmetric_keys/public_key.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
> index eca5671ad3f2..006ae170a16f 100644
> --- a/crypto/asymmetric_keys/public_key.c
> +++ b/crypto/asymmetric_keys/public_key.c
> @@ -43,7 +43,7 @@ static void public_key_describe(const struct key *asymmetric_key,
> void public_key_free(struct public_key *key)
> {
> if (key) {
> - kfree(key->key);
> + kfree_sensitive(key->key);
The public key should not be freed with kfree_sensitive.
Cheers,
--
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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