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

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Message-ID: <544dc03a02ff46dbb62587f3343ffd72@huawei.com>
Date:   Mon, 23 May 2022 03:30:12 +0000
From:   "Gonglei (Arei)" <arei.gonglei@...wei.com>
To:     Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        "dan.carpenter@...cle.com" <dan.carpenter@...cle.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        zhenwei pi <pizhenwei@...edance.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>,
        "virtualization@...ts.linux-foundation.org" 
        <virtualization@...ts.linux-foundation.org>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>
Subject: RE: [PATCH] virtio-crypto: Fix an error handling path in
 virtio_crypto_alg_skcipher_close_session()



> -----Original Message-----
> From: Christophe JAILLET [mailto:christophe.jaillet@...adoo.fr]
> Sent: Sunday, May 22, 2022 9:07 PM
> To: dan.carpenter@...cle.com; Gonglei (Arei) <arei.gonglei@...wei.com>;
> Michael S. Tsirkin <mst@...hat.com>; Jason Wang <jasowang@...hat.com>;
> Herbert Xu <herbert@...dor.apana.org.au>; David S. Miller
> <davem@...emloft.net>; zhenwei pi <pizhenwei@...edance.com>
> Cc: linux-kernel@...r.kernel.org; kernel-janitors@...r.kernel.org; Christophe
> JAILLET <christophe.jaillet@...adoo.fr>;
> virtualization@...ts.linux-foundation.org; linux-crypto@...r.kernel.org
> Subject: [PATCH] virtio-crypto: Fix an error handling path in
> virtio_crypto_alg_skcipher_close_session()
> 
> 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>
> ---
>  drivers/crypto/virtio/virtio_crypto_skcipher_algs.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

Reviewed-by: Gonglei <arei.gonglei@...wei.com>

Regards,
-Gonglei

> 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