Re: [PATCH bpf v3] selftests/bpf: Check returned keys in map batch validators

[Tianyi Chen <diannaaav@gmail.com>]

Hi CI team,

The latest failure for series 1162495 is in VM startup, before veristat
runs. Could you refresh the vmtest executable and rerun the failed job?

The sole failing job is x86_64 GCC 15 / veristat-meta:
https://github.com/kernel-patches/bpf/actions/runs/34808652400/job/103868698882

Its /usr/bin/vmtest appears to contain an HTML document rather than the
expected executable. The log reports:

  /usr/bin/vmtest: line 1: !DOCTYPE: No such file or directory
  /usr/bin/vmtest: line 4: Hello: command not found

It then exits 2 with an unmatched-quote error before the guest starts.
There is no verifier regression result from this job.

The action requests vmtest v0.18.0. The run-vmtest installer in libbpf/ci
uses curl -L to write directly to /usr/bin/vmtest, followed by chmod,
without HTTP failure checking or executable-content validation. Adding
those checks would make this fail clearly at download/install time
instead of trying to execute an HTML response. The log does not identify
which HTTP response or intermediary supplied the page.

The earlier run of this same patch version completed veristat-meta and
reported that its output matched its baseline:
https://github.com/kernel-patches/bpf/actions/runs/34800861264/job/103846813446

The latest run's test_maps jobs also passed on x86_64 GCC, x86_64 LLVM
and aarch64 GCC. This patch changes only three map_tests validators;
it does not change vmtest, CI scripts or the verifier. I am keeping v3
unchanged for this infrastructure failure.

Thanks,
Tianyi