On Thu, 17 Sep 2026 11:33:09 +0800 Qingshuang Fu wrote: > >> +if modprobe -q fou; then > >> + setup_ipv4 > >> + run_ping_test -4 eoudp4 "$TUN4_R" "FOU/GRETAP IPv4 multicast encap > >> resubmit" > >> +else > >> + log_test_skip "FOU/GRETAP IPv4 multicast encap resubmit" > >> +fi > > > > Two very important questions you must answer before posting v2 or any > > other similar fix: > > > > Have you actually run into this or it's a result of an LLM scan? > > > > How many of such fixes would we need to make all the net/ tests > > clean from similar issues? > > I noticed it reading the script, then reproduced it on 6.8.0-138-generic. > This Ubuntu kernel ships with CONFIG_NET_FOU=m by default. Without the fou > module loaded, tunnel creation fails with "RTNETLINK answers: Invalid > argument" > and the test reports a false failure at 0/100 packets. After applying > the patch > the subtest skips cleanly. > > For FOU this was the only gap. The two other net/ tests that use it > (pmtu.sh, rtnetlink.sh) already load the module.
I did not ask about FOU > v2 sent: drop Fixes tag and the in‑script comment as requested. Thanks > for the review. I guess I wasn't clear enough. When I say "before posting v2" I was hoping you'd give me a chance to respond too :/ Whatever.
