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

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Date:   Sun, 22 May 2022 15:07:10 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     dan.carpenter@...cle.com, Gonglei <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(-)

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