PID can't be read /proc/ 0

[axet]

I'm using debian 13 (trixie) and opensnitch stop to work with ping.

It seems like opensnitch can't get PID of ping process and unable to create connection.

It used to work, month ago, but with recent updates it stops working. I also applied 50217af commit to enable ping support.

Also if I force connection.go/newConnectionImpl to return empty process c.Process = procmon.NewProcess(pid, "") ping starts to work.

Something went wrong with recent debian updates / kernel updates?

[2024-07-16 12:51:17]  DBG  [ebpf] tcp map: 0 active items
[2024-07-16 12:51:17]  DBG  [ebpf] tcp6 map: 0 active items
[2024-07-16 12:51:17]  DBG  [ebpf] udp map: 5 active items
[2024-07-16 12:51:17]  DBG  [ebpf] udp6 map: 0 active items
...
[2024-07-16 12:51:18]  DBG  new connection icmp => 0:10.10.5.50 -> 0.0.0.1:0 uid: 1000
[2024-07-16 12:51:18]  DBG  PID can't be read /proc/ 0
[2024-07-16 12:51:18]  DBG  Could not find process by its pid 0 for: 10.10.5.50 (uid:1000) ->(icmp)-> 0.0.0.1:0
[2024-07-16 12:51:19]  DBG  new connection icmp => 0:10.10.5.50 -> 0.0.0.1:0 uid: 1000
[2024-07-16 12:51:19]  DBG  PID can't be read /proc/ 0
[2024-07-16 12:51:19]  DBG  Could not find process by its pid 0 for: 10.10.5.50 (uid:1000) ->(icmp)-> 0.0.0.1:0