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[Po-Hsu Lin <2023546@xxxxxxxxxxxxxxxxxx>]

** Tags added: 6.2 lunar ubuntu-kernel-selftests

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https://bugs.launchpad.net/bugs/2023546

Title:
  All ubuntu_kernel_selftests/net:so_incoming_cpu tests fail

Status in ubuntu-kernel-tests:
  New

Bug description:
  This was seen while testing the lunar:linux-aws 6.2.0-1005.5 release.
  All tests fail with:

  Expected 2 (2) <= self->nproc (1)

  Full logs from http://10.246.75.167/2023.05.15/lunar/linux-
  aws/6.2.0-1005.5/sru-aws-aws-a1.medium-ubuntu_kernel_selftests-
  log.html#net:so_incoming_cpu-start:

  Running 'make run_tests -C net TEST_PROGS=so_incoming_cpu TEST_GEN_PROGS='' TEST_CUSTOM_PROGS='''
  make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/net'
  TAP version 13
  1..1
  # selftests: net: so_incoming_cpu
  # TAP version 13
  # 1..12
  # # Starting 12 tests from 5 test cases.
  # #  RUN           so_incoming_cpu.before_reuseport.test1 ...
  # # so_incoming_cpu.c:62:test1:Expected 2 (2) <= self->nproc (1)
  # # test1: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.before_reuseport.test1
  # not ok 1 so_incoming_cpu.before_reuseport.test1
  # #  RUN           so_incoming_cpu.before_reuseport.test2 ...
  # # so_incoming_cpu.c:62:test2:Expected 2 (2) <= self->nproc (1)
  # # test2: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.before_reuseport.test2
  # not ok 2 so_incoming_cpu.before_reuseport.test2
  # #  RUN           so_incoming_cpu.before_reuseport.test3 ...
  # # so_incoming_cpu.c:62:test3:Expected 2 (2) <= self->nproc (1)
  # # test3: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.before_reuseport.test3
  # not ok 3 so_incoming_cpu.before_reuseport.test3
  # #  RUN           so_incoming_cpu.before_listen.test1 ...
  # # so_incoming_cpu.c:62:test1:Expected 2 (2) <= self->nproc (1)
  # # test1: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.before_listen.test1
  # not ok 4 so_incoming_cpu.before_listen.test1
  # #  RUN           so_incoming_cpu.before_listen.test2 ...
  # # so_incoming_cpu.c:62:test2:Expected 2 (2) <= self->nproc (1)
  # # test2: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.before_listen.test2
  # not ok 5 so_incoming_cpu.before_listen.test2
  # #  RUN           so_incoming_cpu.before_listen.test3 ...
  # # so_incoming_cpu.c:62:test3:Expected 2 (2) <= self->nproc (1)
  # # test3: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.before_listen.test3
  # not ok 6 so_incoming_cpu.before_listen.test3
  # #  RUN           so_incoming_cpu.after_listen.test1 ...
  # # so_incoming_cpu.c:62:test1:Expected 2 (2) <= self->nproc (1)
  # # test1: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.after_listen.test1
  # not ok 7 so_incoming_cpu.after_listen.test1
  # #  RUN           so_incoming_cpu.after_listen.test2 ...
  # # so_incoming_cpu.c:62:test2:Expected 2 (2) <= self->nproc (1)
  # # test2: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.after_listen.test2
  # not ok 8 so_incoming_cpu.after_listen.test2
  # #  RUN           so_incoming_cpu.after_listen.test3 ...
  # # so_incoming_cpu.c:62:test3:Expected 2 (2) <= self->nproc (1)
  # # test3: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.after_listen.test3
  # not ok 9 so_incoming_cpu.after_listen.test3
  # #  RUN           so_incoming_cpu.after_all_listen.test1 ...
  # # so_incoming_cpu.c:62:test1:Expected 2 (2) <= self->nproc (1)
  # # test1: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.after_all_listen.test1
  # not ok 10 so_incoming_cpu.after_all_listen.test1
  # #  RUN           so_incoming_cpu.after_all_listen.test2 ...
  # # so_incoming_cpu.c:62:test2:Expected 2 (2) <= self->nproc (1)
  # # test2: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.after_all_listen.test2
  # not ok 11 so_incoming_cpu.after_all_listen.test2
  # #  RUN           so_incoming_cpu.after_all_listen.test3 ...
  # # so_incoming_cpu.c:62:test3:Expected 2 (2) <= self->nproc (1)
  # # test3: Test terminated by assertion
  # #          FAIL  so_incoming_cpu.after_all_listen.test3
  # not ok 12 so_incoming_cpu.after_all_listen.test3
  # # FAILED: 0 / 12 tests passed.
  # # Totals: pass:0 fail:12 xfail:0 xpass:0 skip:0 error:0
  not ok 1 selftests: net: so_incoming_cpu # exit=1

  It is not considered a regression as this is the first time we have
  run these tests for lunar:linux-aws on a non-development release,
  while the past development releases also have this bug. See, for
  example, lunar:linux-aws 6.2.0-1002.2 in d2023.03.07
  (http://10.246.75.167/d2023.03.07/lunar/linux-aws/6.2.0-1002.2/sru-
  aws-aws-a1.medium-ubuntu_kernel_selftests-
  log.html#net:so_incoming_cpu-start).

  As an additional note, this doesn't affect all instance types. For
  example, it passed on c3.xlarge while it failed on a1.medium.

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