It looks like it's caused by the "macsec" test.
Here is an output from -91 + test from -106: $ sudo ./rtnetlink.sh PASS: policy routing PASS: route get PASS: preferred_lft addresses have expired PASS: promote_secondaries complete PASS: tc htb hierarchy PASS: gre tunnel endpoint PASS: gretap PASS: ip6gretap PASS: erspan PASS: ip6erspan PASS: bridge setup PASS: ipv6 addrlabel PASS: set ifalias e15265b2-91be-4a42-a08f-682913cb1767 for test-dummy0 PASS: vrf PASS: vxlan PASS: fou PASS: macsec PASS: ipsec PASS: ipsec_offload PASS: bridge fdb get PASS: neigh get PASS: bridge_parent_id
It looks like it's caused by the "macsec" test.
Here is an output from -91 + test from -106: 91be-4a42- a08f-682913cb17 67 for test-dummy0
$ sudo ./rtnetlink.sh
PASS: policy routing
PASS: route get
PASS: preferred_lft addresses have expired
PASS: promote_secondaries complete
PASS: tc htb hierarchy
PASS: gre tunnel endpoint
PASS: gretap
PASS: ip6gretap
PASS: erspan
PASS: ip6erspan
PASS: bridge setup
PASS: ipv6 addrlabel
PASS: set ifalias e15265b2-
PASS: vrf
PASS: vxlan
PASS: fou
PASS: macsec
PASS: ipsec
PASS: ipsec_offload
PASS: bridge fdb get
PASS: neigh get
PASS: bridge_parent_id