[PATCH v3 1/4] vhost: fix vq use after free on NUMA reallocation

[David Marchand]

translate_ring_addresses (via numa_realloc) may change a virtio device and
virtio queue.
The virtqueue object must be refreshed before accessing the lock.

Fixes: 04c27cb673b9 ("vhost: fix unsafe vring addresses modifications")
Cc: stable at dpdk.org

Signed-off-by: David Marchand <david.marchand at redhat.com>
---
 lib/vhost/vhost_user.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/vhost/vhost_user.c b/lib/vhost/vhost_user.c
index 4ad28bac45..91d40e32fc 100644
--- a/lib/vhost/vhost_user.c
+++ b/lib/vhost/vhost_user.c
@@ -2596,6 +2596,7 @@ vhost_user_iotlb_msg(struct virtio_net **pdev,
 			if (is_vring_iotlb(dev, vq, imsg)) {
 				rte_spinlock_lock(&vq->access_lock);
 				*pdev = dev = translate_ring_addresses(dev, i);
+				vq = dev->virtqueue[i];
 				rte_spinlock_unlock(&vq->access_lock);
 			}
 		}
-- 
2.36.1