Pengwin: ss -a answers invalid argument

[plttn]

Describe the bug
Running ss -a (as used by https://github.com/BlackReloaded/wsl2-ssh-pageant) results in an output of RTNETLINK answers: Invalid argument as well as the appropriate output
To Reproduce
Steps to reproduce the behavior:

1. enter ss -a
2. output results in regular output as well as the error

Expected behavior
For RTNETLINK error to not appear.

Additional context
This issue did not previously appear on Pengwin. https://github.com/BlackReloaded/wsl2-ssh-pageant/issues/17

Basic Troubleshooting Checklist

[x] I have searched Google for the error message.
[x] I have checked official WSL troubleshooting documentation: https://docs.microsoft.com/en-us/windows/wsl/troubleshooting#confirm-wsl-is-enabled.
[x] I have searched the official Microsoft WSL issues page: https://github.com/Microsoft/WSL/issues.
[x] I have searched the Pengwin issues page: https://github.com/WhitewaterFoundry/Pengwin/issues.
[x] I have run Windows 10 updates and restarted.
[x] I have restarted WSL service: wsl.exe --terminate WLinux wsl.exe --shutdown.

What other troubleshooting have you attempted?

Per https://github.com/BlackReloaded/wsl2-ssh-pageant/issues/17, v5.5.0 of iproute was fine, 5.10.0 causes the issue.

Insert here:

Pengwin Version

Run grep "PENGWIN_VERSION" /etc/os-release in Pengwin.

Insert here: 20.12.1

WSL general info

Run wslsys in Pengwin.

Insert here:

WSL Version: 2
Locale: en_US
Release Install Date: Tue Aug  4 17:12:57 PDT 2020
Branch: vb_release
Build: 19042
Full Build: 19041.1.amd64fre.vb_release.191206-1406
Display Scaling: 1
Windows Theme: light
Windows Uptime: 3d 23h 48m
WSL Uptime: 1d 9h 35m
WSL Release: Pengwin
WSL Kernel: Linux 4.19.104-microsoft-standard
Packages Count: 866

[crramirez]

Hello,

Thank you for the report. Looks like we need to limit this package version until WSL gets fixed.

We will investigate it

Regards,
Carlos

[plttn]

I've gone ahead and downgraded it to 4.9 on my end for now, and that has resolved the problem for now.

[plttn]

Was this package ever held back, or should I continue manually downgrading it for now?

[crramirez]

Hello,

We haven't worked on it yet. Sorry for the inconvenience and thank you for the reminder. We will work on it today or tomorrow.

Regards,
Carlos

[ferrazpedro]

Just to add some more information. I was having the exact same problem with FedoraRemix 33, and downgrading iproute to 5.8.0 was my solution.

[crramirez]

Very useful information, becuse we need to do the same to fedora remix at least until Microsoft upgrades the kernel

[crramirez]

Hello,

The fix will ship in the next pengwin release. To fix it now just run:

sudo apt-get install -q -y --allow-downgrades iproute2=5.8.0-1

The package was uploaded to whitewater foundry repos. So you don't need to do anything further.

Regards

[crramirez]

For Fedora the change is already in upgrade.sh and a new image is being generated