linux-kernel - Re: [PATCH] virtio-crypto: Fix an error handling path in virtio_crypto_alg_skcipher_close

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Date:   Tue, 24 May 2022 14:32:16 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Gonglei <arei.gonglei@...wei.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        zhenwei pi <pizhenwei@...edance.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org,
        virtualization <virtualization@...ts.linux-foundation.org>,
        linux-crypto@...r.kernel.org
Subject: Re: [PATCH] virtio-crypto: Fix an error handling path in virtio_crypto_alg_skcipher_close_session()

On Sun, May 22, 2022 at 9:07 PM Christophe JAILLET
<christophe.jaillet@...adoo.fr> wrote:
>
> Now that a private buffer is allocated (see commit in the Fixes tag),
> it must be released in all error handling paths.
>
> Add the missing goto to avoid a leak in the error handling path.
>
> Fixes: 42e6ac99e417 ("virtio-crypto: use private buffer for control request")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Acked-by: Jason Wang <jasowang@...hat.com>

> ---
>  drivers/crypto/virtio/virtio_crypto_skcipher_algs.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c b/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c
> index e553ccadbcbc..e5876286828b 100644
> --- a/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c
> +++ b/drivers/crypto/virtio/virtio_crypto_skcipher_algs.c
> @@ -239,7 +239,8 @@ static int virtio_crypto_alg_skcipher_close_session(
>                 pr_err("virtio_crypto: Close session failed status: %u, session_id: 0x%llx\n",
>                         ctrl_status->status, destroy_session->session_id);
>
> -               return -EINVAL;
> +               err = -EINVAL;
> +               goto out;
>         }
>
>         err = 0;
> --
> 2.34.1
>