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* [PATCH] virtio_vdpa: reject invalid vq indices
@ 2021-07-01 11:46 Vincent Whitchurch
  2021-07-02  2:49 ` Jason Wang
  2021-07-05 15:51 ` Stefano Garzarella
  0 siblings, 2 replies; 3+ messages in thread
From: Vincent Whitchurch @ 2021-07-01 11:46 UTC (permalink / raw)
  To: Michael S. Tsirkin, Jason Wang
  Cc: kernel, Vincent Whitchurch, virtualization, linux-kernel

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


^ permalink raw reply	[flat|nested] 3+ messages in thread

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2021-07-01 11:46 [PATCH] virtio_vdpa: reject invalid vq indices Vincent Whitchurch
2021-07-02  2:49 ` Jason Wang
2021-07-05 15:51 ` Stefano Garzarella

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