On Wed, Jul 29, 2020 at 10:57 AM CEST, Jakub Sitnicki wrote: > On Tue, Jul 28, 2020 at 10:13 PM CEST, Andrii Nakryiko wrote: > > [...] > >> We are getting this failure in Travis CI when syncing libbpf [0]: >> >> ``` >> ip: either "local" is duplicate, or "nodad" is garbage >> >> switch_netns:PASS:unshare 0 nsec >> >> switch_netns:FAIL:system failed >> >> (/home/travis/build/libbpf/libbpf/travis-ci/vmtest/bpf-next/tools/testing/selftests/bpf/prog_tests/sk_lookup.c:1310: >> errno: No such file or directory) system(ip -6 addr add dev lo >> fd00::1/128 nodad) >> >> #73 sk_lookup:FAIL >> ``` >> >> >> Can you please help fix it so that it works in a Travis CI environment >> as well? For now I disabled sk_lookup selftests altogether. You can >> try to repro it locally by forking https://github.com/libbpf/libbpf >> and enabling Travis CI for your account. See [1] for the PR that >> disabled sk_lookup. [...] Once this fix-up finds its way to bpf-next, we will be able to re-enable sk_loookup tests: https://lore.kernel.org/bpf/20200730125325.1869363-1-jakub@xxxxxxxxxxxxxx/ And I now know that I need to test shell commands against BusyBox 'ip' command implementation, that libbpf project uses in CI env.