Opened 8 weeks ago

Last modified 4 weeks ago

#14982 new bug

Kills Host Networking when running in VirtualBox

Reported by: AGMS Owned by: axeld
Priority: normal Milestone: Unscheduled
Component: Network & Internet/IPv4 Version: R1/Development
Keywords: VikrtualBox Networking ICMP Host Unreachable Cc: agmsmith@…
Blocked By: Blocking:
Has a Patch: no Platform: All


Recent nightlies (hrev53001 and others after Beta 1) when running in VirtualBox kill the host networking somehow, by adding a packet that says the destination is unreachable. Stopping the Haiku VM (or just turning off networking in Haiku) resumes normal functionality.

Here's what a ping command looks like when running in the host (Fedora 29 Linux), the problems happen when Haiku networking starts working:

PING ( 56(84) bytes of data.
64 bytes from ( icmp_seq=1 ttl=54 time=15.9 ms
64 bytes from ( icmp_seq=28 ttl=54 time=24.0 ms
64 bytes from ( icmp_seq=29 ttl=54 time=8.15 ms
From ( icmp_seq=30 Destination Host Unreachable
64 bytes from ( icmp_seq=30 ttl=54 time=85.10 ms
From ( icmp_seq=31 Destination Host Unreachable

It looks like Haiku is sending a spurious reply ICMP packet with a destination host unreachable error code. That mixes in with the real reply to the ping. Not a big problem if you are just pinging, but in particular TCP is affected so web browsing stops working, etc. Though BitTorrent transfers keep on going (they use their own packet protocol).

However, other real computers on the network work fine, and other VMs keep on running too.

Happens with VBox set up for bridged networking (not VBox NAT mode); dynamic address assigned by the normal LAN DHCP server. Running an emulated Intel PRO/1000 MT Desktop (82540EM) in promiscuous "allow all" mode.

I'll be investigating this a bit more; trying to bisect which hrev causes this problem (or discovering that it's something else :-).

Change History (5)

comment:1 Changed 8 weeks ago by waddlesplash

We haven't touched TCP or ICMP in quite a while, so if this is a recent regression that would be surprising. If you find a fix, that will be most welcome, of course :)

comment:2 Changed 5 weeks ago by AGMS

I've tracked it down to hrev52708 being broken, and hrev52707 working. That's the one where the new FreeBSD 12 networking stack and Intel iPro/1000 drivers were added.

It happens in VirtualBox running under both Fedora Linux and Windows 10.

All Intel emulated network cards are affected, and virtio-net too (pleasantly surprised to see it recognised by Haiku). However, the "PCnet-PCI II (Am79C970A)" emulation does work properly (no Host Unreachable problems). "PCnet-FAST III (Am79C973)" seems to work but Haiku freezes up after a while.

So, switch to the PCnet-PCI card and things work. Or use the faster (I assume) virtio-net and put up with your host computer's TCP stack being put out of action.

comment:3 Changed 5 weeks ago by waddlesplash

It's interesting that it worked on the old ipro1000 driver but not the new one. But if it's broken under virtio_net, then this is definitely a larger network stack issue in general.

comment:4 Changed 4 weeks ago by AGMS

Just noticed that those iPro1000 updates in hrev53085 didn't fix it.

comment:5 Changed 4 weeks ago by waddlesplash

As stated already, if it's a problem in virtio_net too, then the problem is the stack, not the drivers.

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