test_maps in ubuntu_bpf failed on Bionic (libbpf: ./sockmap_parse_prog.o doesn't provide kernel version)

  Running test_maps bpf test..
  stderr:
  + PID=133952
  + TMP=/tmp/test_verifier_133952.log
  + echo 'Running test_verifier bpf test..'
  + bpf/test_verifier
  + tee /tmp/test_verifier_133952.log
  ++ grep FAILED /tmp/test_verifier_133952.log
  ++ awk '{print $4}'
  + failed=0
  + rm -f /tmp/test_verifier_133952.log
  + echo -n 'test_verifier: '
  + '[' 0 -gt 0 ']'
  + echo PASSED
  + '[' 0 -ne 0 ']'
  + TMP=/tmp/test_maps_133952.log
  + echo ''
  + echo 'Running test_maps bpf test..'
  + cd bpf
  + ./test_maps
  libbpf: ./sockmap_parse_prog.o doesn't provide kernel version

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-33-generic 4.15.0-33.36
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic s390x
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.9-0ubuntu7.3
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
CurrentDmesg:

Date: Thu Aug 23 08:00:25 2018
HibernationDevice: RESUME=UUID=e2735dd1-cbbc-4424-9c25-d37d073d9414
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:

ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=UUID=38f7d570-2973-4055-b668-12a9ace1e0c7 crashkernel=196M audit=0 BOOT_IMAGE=0
RelatedPackageVersions:
 linux-restricted-modules-4.15.0-33-generic N/A
 linux-backports-modules-4.15.0-33-generic N/A
 linux-firmware 1.173.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)