kernel_selftests failures on kernel-P10d-LPAR10.ppc64el.10

[Roxana Nicolescu]

[Impact]
The powerpc tests from kernel selftests were unable to finish properly
on Power10 VM with Focal 5.4 kernel. There will be lots of failures for
powerpc/ptrace and powerpc/tm tests. For example the ptrace-tm-gpr:
  # selftests: powerpc/ptrace: ptrace-tm-gpr
  # test: ptrace_tm_gpr
  # tags: git_version:unknown
  # [FAIL] Test FAILED on line 94
  # GPR[14]: 1 Expected: 2
  # GPR[15]: 1 Expected: 2
  # GPR[16]: 1 Expected: 2
  # GPR[17]: 1 Expected: 2
  # GPR[18]: 1 Expected: 2
  # GPR[19]: 1 Expected: 2
  # GPR[20]: 1 Expected: 2
  # GPR[21]: 1 Expected: 2
  # GPR[22]: 1 Expected: 2
  # GPR[23]: 1 Expected: 2
  # GPR[24]: 1 Expected: 2
  # GPR[25]: 1 Expected: 2
  # GPR[26]: 1 Expected: 2
  # GPR[27]: 1 Expected: 2
  # GPR[28]: 1 Expected: 2
  # GPR[29]: 1 Expected: 2
  # GPR[30]: 1 Expected: 2
  # GPR[31]: 1 Expected: 2
  # failure: ptrace_tm_gpr
  not ok 1 selftests: powerpc/ptrace: ptrace-tm-gpr # exit=1

[Fix]
* 031fd80f87 selftests: Skip TM tests on synthetic TM implementations

This patch has already landed on Jammy+. Only Focal will need this
patch. And it needs to be backported to skip changes on the
tm-signal-pagefault.c test, which does not exist on Focal tree.

[Test Plan]
Run the patched powerpc tests from kernel selftests:
  $ sudo make TARGETS=powerpc run_tests

Previously failing powerpc/ptrace and powerpc/tm tests will be skipped.
For example the ptrace-tm-gpr test:
  # selftests: powerpc/ptrace: ptrace-tm-gpr
  # test: ptrace_tm_gpr
  # tags: git_version:b315960-dirty
  # [SKIP] Test skipped on line 116
  # skip: ptrace_tm_gpr
  ok 2 selftests: powerpc/ptrace: ptrace-tm-gpr

[Where problems could occur]
Change limited to testing tools, and it's just skipping unsuitable
tests for specific architecture, no impact to real kernel functions.

== Original Bug Report ==
First time seen on cycle 2023.08.10 because it was the first time we tested this instance.
Tried previous focal version (5.4.09-156) and it seems it's happened before.

The following tests are failing:
 * powerpc/ptrace:ptrace-tm-gpr FAIL
 * powerpc/ptrace:ptrace-tm-spd-gpr FAIL
 * powerpc/ptrace:ptrace-tm-tar timeout
 * powerpc/ptrace:ptrace-tm-spd-tar timeout
 * powerpc/ptrace:ptrace-tm-vsx timeout
 * powerpc/ptrace:ptrace-tm-spd-vsx timeout
 * powerpc/ptrace:ptrace-tm-spr timeout

[Po-Hsu Lin (cypressyew)]

The jenkins job will hang, and a manual inspection shows this is because some processes are still running:
 * ptrace-tm-tar
 * ptrace-tm-spd-tar
 * ptrace-tm-vsx
 * ptrace-tm-spd-vsx
 * ptrace-tm-spr

And this is why these test failed with timeout.

[Po-Hsu Lin (cypressyew)]

https://lists.ubuntu.com/archives/kernel-team/2023-December/147649.html

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

This bug is awaiting verification that the linux/5.4.0-171.189 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-focal-linux' to 'verification-done-focal-linux'. If the problem still exists, change the tag 'verification-needed-focal-linux' to 'verification-failed-focal-linux'.

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!

[Po-Hsu Lin (cypressyew)]

These are not failing on Focal anymore. Verified with 5.4.0-171.189

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 5.4.0-171.189

---------------
linux (5.4.0-171.189) focal; urgency=medium

  * focal/linux: 5.4.0-171.189 -proposed tracker (LP: #2048282)

  * Packaging resync (LP: #1786013)
    - [Packaging] remove helper scripts
    - [Packaging] update annotations scripts
    - debian/dkms-versions -- update from kernel-versions (main/2024.01.08)

  * Page fault in RDMA ODP triggers BUG_ON during MMU notifier registration
    (LP: #2046534)
    - RDMA/odp: Ensure the mm is still alive before creating an implicit child

  * Hotplugging SCSI disk in QEMU VM fails (LP: #2047382)
    - Revert "PCI: acpiphp: Reassign resources on bridge if necessary"

  * CVE-2023-6040
    - netfilter: nf_tables: Reject tables of unsupported family

  * kernel_selftests failures on kernel-P10d-LPAR10.ppc64el.10
    (LP: #2032641)
    - selftests: Skip TM tests on synthetic TM implementations

  * [Debian] autoreconstruct - Do not generate chmod -x for deleted files
    (LP: #2045562)
    - [Debian] autoreconstruct - Do not generate chmod -x for deleted files

  * CVE-2023-6931
    - perf/core: Add a new read format to get a number of lost samples
    - perf: Fix perf_event_validate_size()
    - perf: Fix perf_event_validate_size() lockdep splat

  * CVE-2023-6932
    - ipv4: igmp: fix refcnt uaf issue when receiving igmp query packet

  * CVE-2023-6606
    - smb: client: fix OOB in smbCalcSize()

  * CVE-2023-45863
    - kobject: Fix slab-out-of-bounds in fill_kobj_path()

  * Focal update: v5.4.259 upstream stable release (LP: #2043724)
    - RDMA/cxgb4: Check skb value for failure to allocate
    - lib/test_meminit: fix off-by-one error in test_pages()
    - pwm: hibvt: Explicitly set .polarity in .get_state()
    - HID: logitech-hidpp: Fix kernel crash on receiver USB disconnect
    - quota: Fix slow quotaoff
    - net: prevent address rewrite in kernel_bind()
    - drm: etvnaviv: fix bad backport leading to warning
    - drm/msm/dsi: skip the wait for video mode done if not applicable
    - ravb: Fix up dma_free_coherent() call in ravb_remove()
    - ieee802154: ca8210: Fix a potential UAF in ca8210_probe
    - mlxsw: fix mlxsw_sp2_nve_vxlan_learning_set() return type
    - xen-netback: use default TX queue size for vifs
    - drm/vmwgfx: fix typo of sizeof argument
    - ixgbe: fix crash with empty VF macvlan list
    - net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()
    - nfc: nci: assert requested protocol is valid
    - workqueue: Override implicit ordered attribute in
      workqueue_apply_unbound_cpumask()
    - dmaengine: stm32-mdma: abort resume if no ongoing transfer
    - usb: xhci: xhci-ring: Use sysdev for mapping bounce buffer
    - net: usb: dm9601: fix uninitialized variable use in dm9601_mdio_read
    - usb: dwc3: Soft reset phy on probe for host
    - usb: musb: Get the musb_qh poniter after musb_giveback
    - usb: musb: Modify the "HWVers" register address
    - iio: pressure: bmp280: Fix NULL pointer exception
    - iio: pressure: dps310: Adjust Timeout Settings
    - iio: pressure: ms5611: ms5611_prom_is_valid false negative bug
    - mcb: remove is_added flag from mcb_device struct
   ...

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

This bug is awaiting verification that the linux-oracle/5.4.0-1117.126 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-focal-linux-oracle' to 'verification-done-focal-linux-oracle'. If the problem still exists, change the tag 'verification-needed-focal-linux-oracle' to 'verification-failed-focal-linux-oracle'.

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!

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

This bug is awaiting verification that the linux-gkeop/5.4.0-1085.89 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-focal-linux-gkeop' to 'verification-done-focal-linux-gkeop'. If the problem still exists, change the tag 'verification-needed-focal-linux-gkeop' to 'verification-failed-focal-linux-gkeop'.

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!

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

This bug is awaiting verification that the linux-raspi/5.4.0-1102.114 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-focal-linux-raspi' to 'verification-done-focal-linux-raspi'. If the problem still exists, change the tag 'verification-needed-focal-linux-raspi' to 'verification-failed-focal-linux-raspi'.

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!

[Po-Hsu Lin (cypressyew)]

No PPC for raspi and oracle.

[Po-Hsu Lin (cypressyew)]

Hints removed, closing this bug.