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[Qemu-devel] [PATCH V2 01/11] virtio-net: validate backend queue numbers
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PATCH V2 01/11] virtio-net: validate backend queue numbers against bus limitation |
Date: |
Thu, 26 Feb 2015 15:04:36 +0800 |
We don't validate the backend queue numbers against bus limitation,
this will easily crash qemu if it exceeds the limitation. Fixing this
by doing the validation and fail early.
Signed-off-by: Jason Wang <address@hidden>
---
hw/net/virtio-net.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 45da34a..b4ac2b3 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1585,6 +1585,13 @@ static void virtio_net_device_realize(DeviceState *dev,
Error **errp)
virtio_init(vdev, "virtio-net", VIRTIO_ID_NET, n->config_size);
n->max_queues = MAX(n->nic_conf.peers.queues, 1);
+ if (n->max_queues * 2 + 1 > VIRTIO_PCI_QUEUE_MAX) {
+ error_setg(errp, "Invalid number of queues (= %" PRIu32 "), "
+ "must be a postive integer less than %d.",
+ n->max_queues, (VIRTIO_PCI_QUEUE_MAX - 1) / 2);
+ virtio_cleanup(vdev);
+ return;
+ }
n->vqs = g_malloc0(sizeof(VirtIONetQueue) * n->max_queues);
n->vqs[0].rx_vq = virtio_add_queue(vdev, 256, virtio_net_handle_rx);
n->curr_queues = 1;
--
1.9.1
[Qemu-devel] [PATCH V2 05/11] virtio-serial-bus: switch to bus specific queue limit, Jason Wang, 2015/02/26
[Qemu-devel] [PATCH V2 04/11] virtio-ccw: introduce ccw specific queue limit, Jason Wang, 2015/02/26