I can finish running this test manually with autotest framework locally on this 
affected node modoc with 5.3.0-43:
AUTOTEST_PATH=/home/ubuntu/autotest sudo -E autotest/client/autotest-local 
--verbose autotest/client/tests/ubuntu_kernel_selftests/control

And the test suite can finish without tripping this issue.

But during the test I noticed that there will be another "missing remote IOA" 
error in dmesg:
[  353.854103] test_bpf: Summary: 378 PASSED, 0 FAILED, [366/366 JIT'ed]
[  353.854127] test_bpf: test_skb_segment: success in skb_segment!
[  359.982427] u32 classifier
[  359.982431]     input device check on
[  359.982432]     Actions configured
[  360.023690] gre: GRE over IPv4 demultiplexor driver
[  360.027718] ip_gre: GRE over IPv4 tunneling driver
[  360.231910] ip6_gre: GRE over IPv6 tunneling driver
[  361.139317] bridge: filtering via arp/ip/ip6tables is no longer available by 
default. Update your scripts to load br_netfilter if you need this.
[  361.141793] test-br0: port 1(test-dummy0) entered blocking state
[  361.141796] test-br0: port 1(test-dummy0) entered disabled state
[  361.141929] device test-dummy0 entered promiscuous mode
[  361.143982] test-br0: port 1(test-dummy0) entered blocking state
[  361.143984] test-br0: port 1(test-dummy0) entered forwarding state
[  361.166931] 8021q: 802.1Q VLAN Support v1.8
[  361.276750] device test-dummy0 left promiscuous mode
[  361.276826] test-br0: port 1(test-dummy0) entered disabled state
[  363.318680] MACsec IEEE 802.1AE
[  363.401018] Initializing XFRM netlink socket
[  365.457161] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[  365.462267] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[  365.464936] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready
[  365.550548] bpfilter: Loaded bpfilter_umh pid 20653
[  366.415447] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[  397.070039] ipr 0001:08:00.0: 9076: Configuration error, missing remote IOA
[  397.070068] ipr 0001:08:00.0: Attached Adapter not discovered within 
allotted time [PRC: 17101541]
[  397.070077] ipr 0001:08:00.0: Remote IOA VPID/SN:   00000000
[  397.070084] ipr 0001:08:00.0: Remote IOA WWN: 0000000000000000

Maybe it's some combination issue with the sru-misc test suite, which contains 
the following tests and will be executed in the following order:
        'hwclock',
        'libhugetlbfs',
        'ubuntu_bpf_jit',
        'ubuntu_kernel_selftests',
        'ubuntu_lxc',
        'ubuntu_seccomp',
        'ubuntu_unionmount_ovlfs',
        'ubuntu_cts_kernel',
        'ubuntu_kvm_unit_tests',

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https://bugs.launchpad.net/bugs/1869032

Title:
  Kernel oopsed and null pointer dereference while running
  ubuntu_kernel_selftests on Eoan Power8

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