ftrace test in ubuntu_kernel_selftests will timeout randomly

Bug #1864172 reported by Po-Hsu Lin
12
This bug affects 1 person
Affects Status Importance Assigned to Milestone
ubuntu-kernel-tests
Fix Released
Undecided
Po-Hsu Lin
linux (Ubuntu)
Fix Released
Undecided
Po-Hsu Lin
Bionic
Fix Released
Undecided
Po-Hsu Lin
Disco
Won't Fix
Undecided
Po-Hsu Lin
Eoan
Fix Released
Undecided
Po-Hsu Lin
Focal
Fix Released
Undecided
Po-Hsu Lin

Bug Description

== SRU Justification ==
A new timeout feature was added to kselftests in commit 852c8cbf
(selftests/kselftest/runner.sh: Add 45 second timeout per test)

However the ftrace test will take much longer than 45 seconds to run,
thus you will see it failed with:
   not ok 1 selftests: ftrace: ftracetest # TIMEOUT

== Fix ==
* 9fab89cc (tracing/selftests: Turn off timeout setting)

This patch will turn off the timeout setting for the ftrace test.
It can be cherry-picked into B/D/E/F, we don't run this test in X so it
can be skipped.

Note that we don't have 852c8cbf in B/D, but I think it's still OK to
fix them as the change is really small, and if they got that patch in
the future we don't need to look back on this.

== Test ==
Patch tested directly on KVM nodes. It works as expected.

== Regression Potential ==
Low, trivial change limited to testing tools.

== Original Bug Report ==
Issue found on Eoan

this test will timeout quite randomly before the test can complete:

1st attempt:
 # [23] ftrace - function trace on module [PASS]
 # [24] ftrace - function profiling#
 not ok 1 selftests: ftrace: ftracetest # TIMEOUT

2nd attemp:
# [31] Kprobe dynamic event - adding and removing [PASS]
# [32] Kprobe dynamic event - busy event check#
not ok 1 selftests: ftrace: ftracetest # TIMEOUT

3rd attempt:
# [35] Kprobe event string type argument [PASS]
# [36] Kprobe event symbol argument#
not ok 1 selftests: ftrace: ftracetest # TIMEOUT

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: linux-image-5.3.0-40-generic 5.3.0-40.32
ProcVersionSignature: User Name 5.3.0-40.32-generic 5.3.18
Uname: Linux 5.3.0-40-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116, 1 Feb 21 09:05 seq
 crw-rw---- 1 root audio 116, 33 Feb 21 09:05 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Date: Fri Feb 21 09:09:06 2020
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:

ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcFB: 0 cirrusdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.3.0-40-generic root=UUID=29438a95-0e7a-484b-a1fb-527f0e3d2e06 ro console=tty1 console=ttyS0
RelatedPackageVersions:
 linux-restricted-modules-5.3.0-40-generic N/A
 linux-backports-modules-5.3.0-40-generic N/A
 linux-firmware 1.183.4
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: 1.10.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-bionic
dmi.modalias: dmi:bvnSeaBIOS:bvr1.10.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-bionic:cvnQEMU:ct1:cvrpc-i440fx-bionic:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-bionic
dmi.sys.vendor: QEMU

CVE References

Revision history for this message
Po-Hsu Lin (cypressyew) wrote :
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote : Status changed to Confirmed

This change was made by a bot.

Changed in linux (Ubuntu):
status: New → Confirmed
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

Issue found on Focal ARM64:
# [26] ftrace - test reading of set_ftrace_filter [PASS]
# [27] ftrace - test for function traceon/off triggers
not ok 1 selftests: ftrace: ftracetest # TIMEOUT

summary: - ftrace test in ubuntu_kernel_selftests will timeout on E
+ ftrace test in ubuntu_kernel_selftests will timeout randomly
Changed in linux (Ubuntu Focal):
status: Confirmed → In Progress
Changed in linux (Ubuntu Eoan):
status: New → In Progress
Changed in ubuntu-kernel-tests:
status: New → In Progress
assignee: nobody → Po-Hsu Lin (cypressyew)
Changed in linux (Ubuntu Eoan):
assignee: nobody → Po-Hsu Lin (cypressyew)
Changed in linux (Ubuntu Focal):
assignee: nobody → Po-Hsu Lin (cypressyew)
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

We don't have this test in Xenial.

tags: added: focal ubuntu-kernel-selftests
tags: added: sru-20200217
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :
description: updated
description: updated
no longer affects: ubuntu-kernel-tests
Changed in linux (Ubuntu Bionic):
status: New → In Progress
Changed in linux (Ubuntu Disco):
status: New → In Progress
Changed in ubuntu-kernel-tests:
status: New → In Progress
assignee: nobody → Po-Hsu Lin (cypressyew)
Changed in linux (Ubuntu Bionic):
assignee: nobody → Po-Hsu Lin (cypressyew)
Changed in linux (Ubuntu Disco):
assignee: nobody → Po-Hsu Lin (cypressyew)
Sean Feole (sfeole)
tags: added: aws azure
tags: added: 5.3
Po-Hsu Lin (cypressyew)
tags: added: kqa-blocker
Revision history for this message
Sean Feole (sfeole) wrote :

After reviewing the bug, i'm removing the kqa-blocker tag, as this appears to be a bug in the test itself and not a critical failure.

tags: removed: kqa-blocker
Changed in linux (Ubuntu Bionic):
status: In Progress → Fix Committed
Changed in linux (Ubuntu Eoan):
status: In Progress → Fix Committed
Changed in linux (Ubuntu Disco):
status: In Progress → Fix Committed
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

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-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

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!

tags: added: verification-needed-focal
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (81.5 KiB)

This bug was fixed in the package linux - 5.4.0-18.22

---------------
linux (5.4.0-18.22) focal; urgency=medium

  * focal/linux: 5.4.0-18.22 -proposed tracker (LP: #1866488)

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

  * Add sysfs attribute to show remapped NVMe (LP: #1863621)
    - SAUCE: ata: ahci: Add sysfs attribute to show remapped NVMe device count

  * [20.04 FEAT] Compression improvements in Linux kernel (LP: #1830208)
    - lib/zlib: add s390 hardware support for kernel zlib_deflate
    - s390/boot: rename HEAP_SIZE due to name collision
    - lib/zlib: add s390 hardware support for kernel zlib_inflate
    - s390/boot: add dfltcc= kernel command line parameter
    - lib/zlib: add zlib_deflate_dfltcc_enabled() function
    - btrfs: use larger zlib buffer for s390 hardware compression
    - [Config] Introducing s390x specific kernel config option CONFIG_ZLIB_DFLTCC

  * [UBUNTU 20.04] s390x/pci: increase CONFIG_PCI_NR_FUNCTIONS to 512 in kernel
    config (LP: #1866056)
    - [Config] Increase CONFIG_PCI_NR_FUNCTIONS from 64 to 512 starting with focal
      on s390x

  * CONFIG_IP_MROUTE_MULTIPLE_TABLES is not set (LP: #1865332)
    - [Config] CONFIG_IP_MROUTE_MULTIPLE_TABLES=y

  * Dell XPS 13 9300 Intel 1650S wifi [34f0:1651] fails to load firmware
    (LP: #1865962)
    - iwlwifi: remove IWL_DEVICE_22560/IWL_DEVICE_FAMILY_22560
    - iwlwifi: 22000: fix some indentation
    - iwlwifi: pcie: rx: use rxq queue_size instead of constant
    - iwlwifi: allocate more receive buffers for HE devices
    - iwlwifi: remove some outdated iwl22000 configurations
    - iwlwifi: assume the driver_data is a trans_cfg, but allow full cfg

  * [FOCAL][REGRESSION] Intel Gen 9 brightness cannot be controlled
    (LP: #1861521)
    - Revert "USUNTU: SAUCE: drm/i915: Force DPCD backlight mode on Dell Precision
      4K sku"
    - Revert "UBUNTU: SAUCE: drm/i915: Force DPCD backlight mode on X1 Extreme 2nd
      Gen 4K AMOLED panel"
    - SAUCE: drm/dp: Introduce EDID-based quirks
    - SAUCE: drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED
      panel
    - SAUCE: drm/i915: Force DPCD backlight mode for some Dell CML 2020 panels

  * [20.04 FEAT] Enable proper kprobes on ftrace support (LP: #1865858)
    - s390/ftrace: save traced function caller
    - s390: support KPROBES_ON_FTRACE

  * alsa/sof: load different firmware on different platforms (LP: #1857409)
    - ASoC: SOF: Intel: hda: use fallback for firmware name
    - ASoC: Intel: acpi-match: split CNL tables in three
    - ASoC: SOF: Intel: Fix CFL and CML FW nocodec binary names.

  * [UBUNTU 20.04] Enable CONFIG_NET_SWITCHDEV in kernel config for s390x
    starting with focal (LP: #1865452)
    - [Config] Enable CONFIG_NET_SWITCHDEV in kernel config for s390x starting
      with focal

  * Focal update: v5.4.24 upstream stable release (LP: #1866333)
    - io_uring: grab ->fs as part of async offload
    - EDAC: skx_common: downgrade message importance on missing PCI device
    - net: dsa: b53: Ensure the default VID is untagged
    - net: fib_rules: Correctly set table field when table number exceeds 8 bit...

Changed in linux (Ubuntu Focal):
status: In Progress → Fix Released
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

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-bionic' to 'verification-done-bionic'. If the problem still exists, change the tag 'verification-needed-bionic' to 'verification-failed-bionic'.

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!

tags: added: verification-needed-bionic
Revision history for this message
Ubuntu Kernel Bot (ubuntu-kernel-bot) wrote :

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-eoan' to 'verification-done-eoan'. If the problem still exists, change the tag 'verification-needed-eoan' to 'verification-failed-eoan'.

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!

tags: added: verification-needed-eoan
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

Passed with 4.15.0-94.95, ftrace test can finish now.
18:01:29 DEBUG| [stdout] # of passed: 46
18:01:29 DEBUG| [stdout] # of failed: 0
18:01:29 DEBUG| [stdout] # of unresolved: 0
18:01:29 DEBUG| [stdout] # of untested: 2
18:01:29 DEBUG| [stdout] # of unsupported: 2
18:01:29 DEBUG| [stdout] # of xfailed: 0
18:01:29 DEBUG| [stdout] # of undefined(test bug): 0
18:01:29 DEBUG| [stdout] ok 1..1 selftests: ftracetest [PASS]

tags: added: verification-done-bionic
removed: verification-needed-bionic
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

Passed with Eoan 5.3.0-43.36, ftrace test can finish now.

18:01:29 DEBUG| [stdout] # of passed: 46
18:01:29 DEBUG| [stdout] # of failed: 0
18:01:29 DEBUG| [stdout] # of unresolved: 0
18:01:29 DEBUG| [stdout] # of untested: 2
18:01:29 DEBUG| [stdout] # of unsupported: 2
18:01:29 DEBUG| [stdout] # of xfailed: 0
18:01:29 DEBUG| [stdout] # of undefined(test bug): 0
18:01:29 DEBUG| [stdout] ok 1..1 selftests: ftracetest [PASS]

tags: added: verification-donw-eoan
removed: verification-needed-eoan
tags: added: verification-don-eoan
removed: verification-donw-eoan
tags: added: verification-done-eoan
removed: verification-don-eoan
tags: added: verification-done-focal
removed: verification-needed-focal
Revision history for this message
Po-Hsu Lin (cypressyew) wrote :

Passed with Focal 5.4.0-20.24, ftrace test can finish now.
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of passed: 82
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of failed: 1
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of unresolved: 1
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of untested: 2
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of unsupported: 1
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of xfailed: 1
03/26 00:22:54 DEBUG| utils:0153| [stdout] # # of undefined(test bug): 0
03/26 00:22:54 DEBUG| utils:0153| [stdout] not ok 1 selftests: ftrace: ftracetest # exit=1

Changed in ubuntu-kernel-tests:
status: In Progress → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (49.1 KiB)

This bug was fixed in the package linux - 5.3.0-46.38

---------------
linux (5.3.0-46.38) eoan; urgency=medium

  * eoan/linux: 5.3.0-43.36 -proposed tracker (LP: #1867301)

  * Fix AMD Stoney Ridge screen flickering under 4K resolution (LP: #1864005)
    - iommu/amd: Disable IOMMU on Stoney Ridge systems

  * Allow BPF tracing under lockdown (LP: #1868626)
    - Revert "UBUNTU: SAUCE: (efi-lockdown) Lock down kprobes"
    - Revert "bpf: Restrict bpf when kernel lockdown is in confidentiality mode"

  * Missing wireless network interface after kernel 5.3.0-43 upgrade with eoan
    (LP: #1868442)
    - iwlwifi: mvm: Do not require PHY_SKU NVM section for 3168 devices

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

  * iSCSI-target: Deleting a LUN hangs in the kernel (LP: #1862682)
    - scsi: Revert "target/core: Inline transport_lun_remove_cmd()"

  * Stop using get_scalar_status command in Dell AIO uart backlight driver
    (LP: #1865402)
    - SAUCE: platform/x86: dell-uart-backlight: add get_display_mode command

  * Eoan update: upstream stable patchset 2020-03-11 (LP: #1867051)
    - Revert "drm/sun4i: dsi: Change the start delay calculation"
    - ovl: fix lseek overflow on 32bit
    - kernel/module: Fix memleak in module_add_modinfo_attrs()
    - media: iguanair: fix endpoint sanity check
    - ocfs2: fix oops when writing cloned file
    - x86/cpu: Update cached HLE state on write to TSX_CTRL_CPUID_CLEAR
    - udf: Allow writing to 'Rewritable' partitions
    - printk: fix exclusive_console replaying
    - iwlwifi: mvm: fix NVM check for 3168 devices
    - sparc32: fix struct ipc64_perm type definition
    - cls_rsvp: fix rsvp_policy
    - gtp: use __GFP_NOWARN to avoid memalloc warning
    - l2tp: Allow duplicate session creation with UDP
    - net: hsr: fix possible NULL deref in hsr_handle_frame()
    - net_sched: fix an OOB access in cls_tcindex
    - net: stmmac: Delete txtimer in suspend()
    - bnxt_en: Fix TC queue mapping.
    - tcp: clear tp->total_retrans in tcp_disconnect()
    - tcp: clear tp->delivered in tcp_disconnect()
    - tcp: clear tp->data_segs{in|out} in tcp_disconnect()
    - tcp: clear tp->segs_{in|out} in tcp_disconnect()
    - rxrpc: Fix use-after-free in rxrpc_put_local()
    - rxrpc: Fix insufficient receive notification generation
    - rxrpc: Fix missing active use pinning of rxrpc_local object
    - rxrpc: Fix NULL pointer deref due to call->conn being cleared on disconnect
    - media: uvcvideo: Avoid cyclic entity chains due to malformed USB descriptors
    - mfd: dln2: More sanity checking for endpoints
    - ipc/msg.c: consolidate all xxxctl_down() functions
    - tracing: Fix sched switch start/stop refcount racy updates
    - rcu: Avoid data-race in rcu_gp_fqs_check_wake()
    - brcmfmac: Fix memory leak in brcmf_usbdev_qinit
    - usb: typec: tcpci: mask event interrupts when remove driver
    - usb: gadget: legacy: set max_speed to super-speed
    - usb: gadget: f_ncm: Use atomic_t to track in-flight request
    - usb: gadget: f_ecm: Use atomic_t to track in-flight request
    - ALSA: usb-audio: Fix endianess in descriptor validatio...

Changed in linux (Ubuntu Eoan):
status: Fix Committed → Fix Released
Revision history for this message
Launchpad Janitor (janitor) wrote :
Download full text (27.7 KiB)

This bug was fixed in the package linux - 4.15.0-96.97

---------------
linux (4.15.0-96.97) bionic; urgency=medium

  * CVE-2020-8834
    - KVM: PPC: Book3S HV: Factor fake-suspend handling out of
      kvmppc_save/restore_tm
    - KVM: PPC: Book3S PR: Move kvmppc_save_tm/kvmppc_restore_tm to separate file
    - KVM: PPC: Book3S PR: Add guest MSR parameter for
      kvmppc_save_tm()/kvmppc_restore_tm()

linux (4.15.0-94.95) bionic; urgency=medium

  * bionic/linux: 4.15.0-94.95 -proposed tracker (LP: #1868984)

  * Missing wireless network interface after kernel 5.3.0-43 upgrade with eoan
    (LP: #1868442)
    - iwlwifi: mvm: Do not require PHY_SKU NVM section for 3168 devices

linux (4.15.0-93.94) bionic; urgency=medium

  * bionic/linux: 4.15.0-93.94 -proposed tracker (LP: #1868764)

  * quotactl04 from ubuntu_ltp_syscalls failed with B (LP: #1868665)
    - ext4: fix mount failure with quota configured as module

linux (4.15.0-92.93) bionic; urgency=medium

  * bionic/linux: 4.15.0-92.93 -proposed tracker (LP: #1867272)

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

  * Introduce the new NVIDIA 440 series, and add 5.4 Linux compatibility to the
    340 and 390 series (LP: #1854485)
    - [Packaging] NVIDIA -- add support for the 435 and the 440 series

  * Stop using get_scalar_status command in Dell AIO uart backlight driver
    (LP: #1865402)
    - SAUCE: platform/x86: dell-uart-backlight: add get_display_mode command

  * Bionic update: upstream stable patchset 2020-03-12 (LP: #1867194)
    - RDMA/core: Fix locking in ib_uverbs_event_read
    - gpio: zynq: Report gpio direction at boot
    - arm64: ptrace: nofpsimd: Fail FP/SIMD regset operations
    - KVM: arm: Fix DFSR setting for non-LPAE aarch32 guests
    - KVM: arm: Make inject_abt32() inject an external abort instead
    - mtd: onenand_base: Adjust indentation in onenand_read_ops_nolock
    - mtd: sharpslpart: Fix unsigned comparison to zero
    - padata: fix null pointer deref of pd->pinst
    - Input: synaptics - switch T470s to RMI4 by default
    - Input: synaptics - enable SMBus on ThinkPad L470
    - Input: synaptics - remove the LEN0049 dmi id from topbuttonpad list
    - ALSA: hda/realtek - Fix silent output on MSI-GL73
    - ALSA: usb-audio: Apply sample rate quirk for Audioengine D1
    - arm64: cpufeature: Set the FP/SIMD compat HWCAP bits properly
    - ALSA: usb-audio: sound: usb: usb true/false for bool return type
    - ext4: don't assume that mmp_nodename/bdevname have NUL
    - ext4: fix support for inode sizes > 1024 bytes
    - ext4: fix checksum errors with indexed dirs
    - ext4: add cond_resched() to ext4_protect_reserved_inode
    - ext4: improve explanation of a mount failure caused by a misconfigured
      kernel
    - Btrfs: fix race between using extent maps and merging them
    - btrfs: ref-verify: fix memory leaks
    - btrfs: print message when tree-log replay starts
    - btrfs: log message when rw remount is attempted with unclean tree-log
    - arm64: ssbs: Fix context-switch when SSBS is present on all CPUs
    - perf/x86/amd: Add missing L2 misses event spec to AMD Family 17h's ev...

Changed in linux (Ubuntu Bionic):
status: Fix Committed → Fix Released
Steve Langasek (vorlon)
Changed in linux (Ubuntu Disco):
status: Fix Committed → Won't Fix
To post a comment you must log in.
This report contains Public information  
Everyone can see this information.

Duplicates of this bug

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.