The tx_bh or tx_timer will free in virtio_net_del_queue() function, when
removing virtio-net queues if the guest doesn't support multiqueue. But
it might be still referenced by virtio_net_set_status(), which needs to
be set NULL. And also the tx_waiting needs to be set zero to prevent
virtio_net_set_status() accessing tx_bh or tx_timer.
Signed-off-by: Yunjian Wang <address@hidden>
---
hw/net/virtio-net.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
index 7d091c9..98bd683 100644
--- a/hw/net/virtio-net.c
+++ b/hw/net/virtio-net.c
@@ -1522,9 +1522,12 @@ static void virtio_net_del_queue(VirtIONet *n, int index)
if (q->tx_timer) {
timer_del(q->tx_timer);
timer_free(q->tx_timer);
+ q->tx_timer = NULL;
} else {
qemu_bh_delete(q->tx_bh);
+ q->tx_bh = NULL;
}
+ q->tx_waiting = 0;
virtio_del_queue(vdev, index * 2 + 1);
}