On Linux, with "install_routes = no", charon creates a rule 220 but no table

[pjuhen]

System (please complete the following information):

• OS: Fedora 36 and Openwrt 22.03
• Kernel version 6.2.7
• strongSwan version(s): 5.9.9 on Fedora, 5.9.8 on Linux
• Tested/confirmed with the latest version: [yes/no]

Describe the bug
I set "install_routes = no" in charon.conf
However, a rule 220 is created

$ ip rule show
0: from all lookup local
220: from all lookup 220
32766: from all lookup main
32767: from all lookup default

But the corresponding table is non-existent

[]$ sudo ip route show table 220
Error: ipv4: FIB table does not exist.
Dump terminated
$

Seems to be harmless.

To Reproduce
Steps to reproduce the behavior:

1. create an IKE_SA and child_SA "with install_routes = no" in charon.conf

Expected behavior
Rule #220 should not be created

Additional context
Same issue on 5.9.9 (Fedora) and 5.9.8 (Openwrt)

[tobiasbrunner]

I don't really think there is an issue here..