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virtio_vdpa: reject invalid vq indices

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[ Upstream commit cb5d2c1f6c ]

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>
Link: https://lore.kernel.org/r/20210701114652.21956-1-vincent.whitchurch@axis.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vincent Whitchurch
2021-07-01 13:46:52 +02:00
committed by Greg Kroah-Hartman
parent 0698278e8e
commit 6c074eaaf7
1 changed files with 3 additions and 0 deletions
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3
drivers/virtio/virtio_vdpa.c
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@@ -149,6 +149,9 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
if (!name) if (!name)
return NULL; return NULL;
if (index >= vdpa->nvqs)
return ERR_PTR(-ENOENT);
/* Queue shouldn't already be set up. */ /* Queue shouldn't already be set up. */
if (ops->get_vq_ready(vdpa, index)) if (ops->get_vq_ready(vdpa, index))
return ERR_PTR(-ENOENT); return ERR_PTR(-ENOENT);