Alyssa Ross <hi@alyssa.is> writes:

> Since we introduced the userspace router, if I start the Firefox VM,
> quit Firefox, wait for the VM to shut down, and then start it again,
> networking no longer works, and I see repeating log lines like this:
>
> 2025-12-09 09:13:29.147240893  [2025-12-09T09:13:29Z WARN  spectrum_router::router] interface App(0) has been blocked for 1 sec, dropping packet

Ah, and there's also this just as the first Firefox VM exits:

2025-12-09 09:51:17.380783524  [2025-12-09T09:51:17Z ERROR virtio_queue::queue] Iterator error trying to process requests on a queue that's not ready
2025-12-09 09:51:17.380846889  [2025-12-09T09:51:17Z ERROR virtio_queue::queue] Iterator error trying to process requests on a queue that's not ready

> Full reproduction steps:
>
> 1. cd host/rootfs
> 2. nix-shell --run 'make clean && make run'
> 3. Start Firefox VM with vm-start
> 4. See that networking works
> 5. Quit Firefox and wait a few seconds for VM to stop
> 6. Start Firefox VM with vm-start again
> 7. No more networking, and log lines like the above