cpu-hotplug test in ubuntu_kernel_selftest always return 0 on Xenial

[Po-Hsu Lin]

== SRU Justification ==
This cpu-hotplug test will always return PASSED even if there are some failures there:

$ sudo make -C linux/tools/testing/selftests TARGETS=cpu-hotplug run_tests
make: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'
for TARGET in cpu-hotplug; do \
 make -C $TARGET; \
done;
make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
for TARGET in cpu-hotplug; do \
 make -C $TARGET run_tests; \
done;
make[1]: Entering directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
pid 25001's current affinity mask: 3
pid 25001's new affinity mask: 1
CPU online/offline summary:
  Cpus in online state: 0-1
  Cpus in offline state: 2
Limited scope test: one hotplug cpu
  (leaves cpu in the original state):
  online to offline to online: cpu 1
  offline to online to offline: cpu 2
./cpu-on-off-test.sh: line 78: /sys/devices/system/cpu/cpu2/online: No such file or directory
online_cpu_expect_success 2: unexpected fail
./cpu-on-off-test.sh: line 83: /sys/devices/system/cpu/cpu2/online: No such file or directory
offline_cpu_expect_success 2: unexpected fail
selftests: cpu-on-off-test.sh [PASS]
make[1]: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests/cpu-hotplug'
make: Leaving directory '/home/ubuntu/autotest/client/tmp/ubuntu_kernel_selftests/src/linux/tools/testing/selftests'

== Fixes ==
8fe6e53a8ed5f0 (selftests/cpu-hotplug: exit with failure when test occured unexpected behaviors)

For newer releases, they already have this patch.
For Trusty and older release, they will need more work to get this patch.

== Regression Potential ==
None, fix for testing tools.

For Trusty, it's missing another 20 commits to reach 8fe6e53:
4813d2e736 (tools: memory-hotplug fix unexpected operator error)
ddddda9bc4 (tools: selftests - create a separate hotplug target for full range test)
a88cc108f6 (lib: Export interval_tree)
93e9ef83f4 (test: add minimal module for verification testing)
3e2a4c183a (test: check copy_to/from_user boundary validation)
64a8946b44 (net: filter: BPF testsuite)
7069a97a14 (selftests/net: move test out of Makefile into a shell script)
3c25fa14f0 (selftests/user: move test out of Makefile into a shell script)
24fe831c17 (tools/testing/selftests/sysctl: validate sysctl_writes_strict)
0a8adf5847 (test: add firmware_class loader test)
6e68e6c5e4 (ftracetest: Initial commit for ftracetest)
4f5ce5e8d7 (selftests: add memfd_create() + sealing tests)
c9b26b81af (syscalls: add selftest for execveat(2))
3ce51050fa (selftest: size: Add size test for Linux kernel) backport with context arrangement
87b2d44026 (selftests: add memfd/sealing page-pinning tests)
498b473af9 (tools: selftests: fix build issue with make kselftests target)
ce6a144a0d (selftests/memfd: Run test on all architectures)
5e29a9105b (selftests: Introduce minimal shared logic for running tests)
cc16782169 (selftests: change cpu on-off-test.sh name to be unique)
8c749ce93e (selftests: create test-specific kconfig fragments)
8fe6e53a8e (selftests/cpu-hotplug: exit with failure when test occured unexpected behaviors)

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-141-generic 4.4.0-141.167
ProcVersionSignature: Ubuntu 4.4.0-141.167-generic 4.4.162
Uname: Linux 4.4.0-141-generic s390x
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code 2: ls: cannot access '/dev/snd/': No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: s390x
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
CurrentDmesg:

Date: Mon Dec 24 04:08:18 2018
HibernationDevice: RESUME=UUID=ca468a9c-9563-442c-85c6-6055e800a66e
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lspci:

Lsusb: Error: command ['lsusb'] failed with exit code 1:
PciMultimedia:

ProcFB: Error: [Errno 2] No such file or directory: '/proc/fb'
ProcKernelCmdLine: root=UUID=b65b756a-ba4e-4c53-aa32-0db2bdb50bb3 crashkernel=196M
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-141-generic N/A
 linux-backports-modules-4.4.0-141-generic N/A
 linux-firmware 1.157.21
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1809699

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Brad Figg (brad-figg)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-xenial' to 'verification-done-xenial'. If the problem still exists, change the tag 'verification-needed-xenial' to 'verification-failed-xenial'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-142.168

---------------
linux (4.4.0-142.168) xenial; urgency=medium

  * linux: 4.4.0-142.168 -proposed tracker (LP: #1811846)

  * Packaging resync (LP: #1786013)
    - [Packaging] update helper scripts

  * iptables connlimit allows more connections than the limit when using
    multiple CPUs (LP: #1811094)
    - netfilter: xt_connlimit: don't store address in the conn nodes
    - SAUCE: netfilter: xt_connlimit: remove the 'addr' parameter in add_hlist()
    - netfilter: nf_conncount: expose connection list interface
    - netfilter: nf_conncount: Fix garbage collection with zones
    - netfilter: nf_conncount: fix garbage collection confirm race
    - netfilter: nf_conncount: don't skip eviction when age is negative

  * CVE-2017-5715
    - SAUCE: x86/speculation: Cleanup IBPB runtime control handling
    - SAUCE: x86/speculation: Cleanup IBRS runtime control handling
    - SAUCE: x86/speculation: Use x86_spec_ctrl_base in entry/exit code
    - SAUCE: x86/speculation: Move RSB_CTXSW hunk

  * Xenial update: 4.4.167 upstream stable release (LP: #1811077)
    - media: em28xx: Fix use-after-free when disconnecting
    - Revert "wlcore: Add missing PM call for
      wlcore_cmd_wait_for_event_or_timeout()"
    - rapidio/rionet: do not free skb before reading its length
    - s390/qeth: fix length check in SNMP processing
    - usbnet: ipheth: fix potential recvmsg bug and recvmsg bug 2
    - kvm: mmu: Fix race in emulated page table writes
    - xtensa: enable coprocessors that are being flushed
    - xtensa: fix coprocessor context offset definitions
    - Btrfs: ensure path name is null terminated at btrfs_control_ioctl
    - ALSA: wss: Fix invalid snd_free_pages() at error path
    - ALSA: ac97: Fix incorrect bit shift at AC97-SPSA control write
    - ALSA: control: Fix race between adding and removing a user element
    - ALSA: sparc: Fix invalid snd_free_pages() at error path
    - ext2: fix potential use after free
    - dmaengine: at_hdmac: fix memory leak in at_dma_xlate()
    - dmaengine: at_hdmac: fix module unloading
    - btrfs: release metadata before running delayed refs
    - USB: usb-storage: Add new IDs to ums-realtek
    - usb: core: quirks: add RESET_RESUME quirk for Cherry G230 Stream series
    - misc: mic/scif: fix copy-paste error in scif_create_remote_lookup
    - Kbuild: suppress packed-not-aligned warning for default setting only
    - exec: avoid gcc-8 warning for get_task_comm
    - disable stringop truncation warnings for now
    - kobject: Replace strncpy with memcpy
    - unifdef: use memcpy instead of strncpy
    - kernfs: Replace strncpy with memcpy
    - ip_tunnel: Fix name string concatenate in __ip_tunnel_create()
    - drm: gma500: fix logic error
    - scsi: bfa: convert to strlcpy/strlcat
    - staging: rts5208: fix gcc-8 logic error warning
    - kdb: use memmove instead of overlapping memcpy
    - iser: set sector for ambiguous mr status errors
    - uprobes: Fix handle_swbp() vs. unregister() + register() race once more
    - MIPS: ralink: Fix mt7620 nd_sd pinmux
    - mips: fix mips_get_syscall_arg o32 check
    - drm/ast: Fix incorrect free on ioregs
 ...