[Bug 1933090] Re: systemd/245.4-4ubuntu3.6 ADT test failure with linux-hwe-5.11/5.11.0-20.21~20.04.1

[Launchpad Bug Tracker]

** Merge proposal linked:
   https://code.launchpad.net/~enr0n/ubuntu/+source/systemd/+git/systemd/+merge/437809

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Title:
  systemd/245.4-4ubuntu3.6 ADT test failure with linux-
  hwe-5.11/5.11.0-20.21~20.04.1

Status in linux-hwe-5.11 package in Ubuntu:
  Won't Fix
Status in linux-hwe-5.15 package in Ubuntu:
  Invalid
Status in systemd package in Ubuntu:
  Fix Released
Status in linux-hwe-5.11 source package in Focal:
  Won't Fix
Status in linux-hwe-5.15 source package in Focal:
  Invalid
Status in systemd source package in Focal:
  Triaged

Bug description:
  [SRU Impact]

  Sysctl was removed from 5.5 kernels. In src/test/test-seccomp.c, test_protect_syscall
  sysctl is called with the expectation the error result is EFAULT and not ENOSYS.
  This affects autotests for all focal-5.15 linux kernels (hwe, azure, gcp, oem, gke, oracle).

  [Fix]
  Assertion checks if either EFAULT or ENOSYS is returned. This way it will work for focal-5.4 kernels and focal-5.15 kernels.

  [Test to reproduce the issue]
  1. Create a vm and install one of the focal-5.15 kernels (i.e 5.15.0-1029.35~20.04.1 linux-oracle-5.15).
  2. Run the autotests for upstream and/or root-unittests:
  autopkgtest --test-name=upstream systemd -- qemu <vm_image>

  [Test to verify the fix]
  1. Same as above
  2. Apply the fix in your local repo and run the tests using your local repo
  autopkgtest --test-name=upstream <path to systemd> -- qemu <vm_image>

  [Where problems could occur]
  This is not gonna affect end users since it is a change in the test only.
  It may impact autotests, but it's a very low probability.

  [Original Description]

  This is a scripted bug report about ADT failures while running systemd
  tests for linux-hwe-5.11/5.11.0-20.21~20.04.1 on focal. Whether this
  is caused by the dep8 tests of the tested source or the kernel has yet
  to be determined.

  Testing failed on:
      amd64: https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/amd64/s/systemd/20210611_220645_bf5b6@/log.gz
      armhf: https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/armhf/s/systemd/20210617_124738_5b554@/log.gz
      ppc64el: https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/ppc64el/s/systemd/20210611_235629_92856@/log.gz
      s390x: https://autopkgtest.ubuntu.com/results/autopkgtest-focal/focal/s390x/s/systemd/20210611_214456_6427f@/log.gz

  In arm64, ppc64el and s390x, 'root-unittests' fails with:

  /* test_protect_sysctl */
  Assertion 'errno == EFAULT' failed at src/test/test-seccomp.c:311, function test_protect_sysctl(). A
  borting.
  sysctlseccomp terminated by signal ABRT.
  Assertion 'wait_for_terminate_and_check("sysctlseccomp", pid, WAIT_LOG) == EXIT_SUCCESS' failed at s
  rc/test/test-seccomp.c:324, function test_protect_sysctl(). Aborting.
  FAIL: test-seccomp (code: 134)

  In amd64, 'upstream' also fails on 'TEST-24-UNIT-TESTS', which
  apparently is caused by the same 'test-seccomp.c:311' assertion
  failure.

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