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From: Vincent Whitchurch <vincent.whitchurch@axis.com>
To: "Michael S. Tsirkin" <mst@redhat.com>, Jason Wang <jasowang@redhat.com>
Cc: <kernel@axis.com>,
	Vincent Whitchurch <vincent.whitchurch@axis.com>,
	<virtualization@lists.linux-foundation.org>,
	<linux-kernel@vger.kernel.org>
Subject: [PATCH] virtio_vdpa: reject invalid vq indices
Date: Thu, 1 Jul 2021 13:46:52 +0200	[thread overview]
Message-ID: <20210701114652.21956-1-vincent.whitchurch@axis.com> (raw)

Do not call vDPA drivers' callbacks with vq indicies larger than what
the drivers indicate that they support.  vDPA drivers do not bounds
check the indices.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
---
 drivers/virtio/virtio_vdpa.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c
index e28acf482e0c..e9b9dd03f44a 100644
--- a/drivers/virtio/virtio_vdpa.c
+++ b/drivers/virtio/virtio_vdpa.c
@@ -149,6 +149,9 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
 	if (!name)
 		return NULL;
 
+	if (index >= vdpa->nvqs)
+		return ERR_PTR(-ENOENT);
+
 	/* Queue shouldn't already be set up. */
 	if (ops->get_vq_ready(vdpa, index))
 		return ERR_PTR(-ENOENT);
-- 
2.28.0


             reply	other threads:[~2021-07-01 11:46 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01 11:46 Vincent Whitchurch [this message]
2021-07-02  2:49 ` Jason Wang
2021-07-05 15:51 ` Stefano Garzarella

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