Hi Stanislav, looks like flow_dissector selftest got quite unstable recently. test_link_update_invalid_opts:FAIL:340 bpf_link_create(prog1): Argument list too long #33/25 flow dissector link update invalid opts:FAIL test_link_update_invalid_prog:FAIL:400 bpf_link_create(prog1): Argument list too long #33/26 flow dissector link update invalid prog:FAIL #33/27 flow dissector link update netns gone:OK It's failing for me half of the time with a random number of failures. Not sure what happened. I think it was stable in the past. To reproduce: test_progs -t flow_dissector