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dm: NULL check of vq->used in virtio_net_ping_rxq

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Add a check on this place to avoid NULL access issue.

Tracked-On: #6100
Signed-off-by: Jie Deng <jie.deng@intel.com>
This commit is contained in:
Jie Deng 2021-05-24 13:57:49 +08:00 committed by wenlingz
parent e5f0e2e4f8
commit 2e08f32e7a
1 changed files with 3 additions and 1 deletions
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4
devicemodel/hw/pci/virtio/virtio_net.c
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@ -476,7 +476,9 @@ virtio_net_ping_rxq(void *vdev, struct virtio_vq_info *vq)
*/
if (net->rx_ready == 0) {
net->rx_ready = 1;
vq->used->flags |= VRING_USED_F_NO_NOTIFY;
if (vq->used != NULL) {
vq->used->flags |= VRING_USED_F_NO_NOTIFY;
}
}
}