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[Po-Hsu Lin <1879752@xxxxxxxxxxxxxxxxxx>]

** Changed in: ubuntu-kernel-tests
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1879752

Title:
  test_bpf of ubuntu_kernel_selftests.net ADT test failure with linux
  4.4.0-180.210

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Xenial:
  Fix Committed

Bug description:
  [Impact]
  Testcase test_bpf of ubuntu_kernel_selftests.net regressed on xenial/linux 4.4.0-180.210.

  What the test_bpf testcase does is only loading the test_bpf module,
  which reports the following error:

  May 20 16:57:21 autopkgtest kernel: [   88.143826] test_bpf: #250 BPF_MAXINSNS: ld_abs+vlan_push/pop
  jited:1 ret -12 != 3055 FAIL (1 times)

  This is cased by upstream commit 636c2628086e "net: skbuff: Remove
  errornous length validation in skb_vlan_pop()" which we applied from
  stable upstream v4.4.223.

  [Fix]
  The fix is upstream commit 0d906b1e8d40 "bpf, test: fix ld_abs + vlan push/pop stress test" from v4.9 which can cherry-picked to xenial.

  [Test case]
  Load the test_bpf module, it should return no errors.

  [Regression potential]
  Low. The fix changes only a bpf test module and was tested to fix the reported issue.

  
  Original bug report:
  ---------
  Testing failed on:
      amd64: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/amd64/l/linux/20200520_161352_2051b@/log.gz
      i386: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/i386/l/linux/20200520_160450_cdd7c@/log.gz
      ppc64el: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/ppc64el/l/linux/20200520_152728_5aa07@/log.gz
      s390x: https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-xenial/xenial/s390x/l/linux/20200520_151052_5aa07@/log.gz

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