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-rw-r--r--src/vnet/devices/virtio/vhost_user_output.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/vhost_user_output.c b/src/vnet/devices/virtio/vhost_user_output.c
index 820594999c8..9b6c01704bf 100644
--- a/src/vnet/devices/virtio/vhost_user_output.c
+++ b/src/vnet/devices/virtio/vhost_user_output.c
@@ -261,6 +261,12 @@ VNET_DEVICE_CLASS_TX_FN (vhost_user_device_class) (vlib_main_t * vm,
VHOST_VRING_IDX_RX (*vec_elt_at_index
(vui->per_cpu_tx_qid, thread_index));
rxvq = &vui->vrings[qid];
+ if (PREDICT_FALSE (rxvq->avail == 0))
+ {
+ error = VHOST_USER_TX_FUNC_ERROR_MMAP_FAIL;
+ goto done3;
+ }
+
if (PREDICT_FALSE (vui->use_tx_spinlock))
vhost_user_vring_lock (vui, qid);