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[Jürg Häfliger <1868243@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1868243

Title:
  ld_abs+vlan_push/pop from test_bpf in ubuntu_bpf_jit will fail on X
  s390x

Status in ubuntu-kernel-tests:
  New
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Confirmed

Bug description:
  Issue separated from bug 1768452
  The ubuntu_bpf_jit will report the following failure on Xenial s390x:
    * test_bpf: #250 BPF_MAXINSNS: ld_abs+vlan_push/pop FAIL to select_runtime err=-524

  This test has been moved to the test_verifier test in bpf of kselftests:
  https://github.com/torvalds/linux/commit/93731ef086cee90af594e62874bb98ae6d6eee91

  "Remove all eBPF tests involving LD_ABS/LD_IND from test_bpf.ko. Reason
  is that the eBPF tests from test_bpf module do not go via BPF verifier
  and therefore any instruction rewrites from verifier cannot take place.

  Therefore, move them into test_verifier which runs out of user space,
  so that verfier can rewrite LD_ABS/LD_IND internally in upcoming patches.
  It will have the same effect since runtime tests are also performed from
  there. This also allows to finally unexport bpf_skb_vlan_{push,pop}_proto
  and keep it internal to core kernel."

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