canonical-ubuntu-qa team mailing list archive

[Jürg Häfliger <1812796@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

-- 
You received this bug notification because you are a member of Canonical
Platform QA Team, which is subscribed to ubuntu-kernel-tests.
https://bugs.launchpad.net/bugs/1812796

Title:
  TRACE_syscall.ptrace_syscall_dropped in seccomp from
  ubuntu_kernel_selftests failed on B/C PowerPC

Status in ubuntu-kernel-tests:
  Fix Released
Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Bionic:
  Fix Released
Status in linux source package in Cosmic:
  Won't Fix

Bug description:
  == SRU Justification ==
  The TRACE_syscall.ptrace_syscall_dropped test in seccomp from ubuntu_kernel_selftests will fail on a Power8 node with B/C kernel.

  [ RUN      ] TRACE_syscall.ptrace_syscall_dropped
  seccomp_bpf.c:1808:TRACE_syscall.ptrace_syscall_dropped:Expected 1 (1) == syscall(286) (18446744073709551615)
  TRACE_syscall.ptrace_syscall_dropped: Test failed at step #13
  [     FAIL ] TRACE_syscall.ptrace_syscall_dropped

  == Fix ==
  * ed5f1326 (selftests/seccomp: Enhance per-arch ptrace syscall skip tests)

  This patch can be cherry-picked into B/C, and it's already in Disco.
  The ptrace_syscall_dropped will be changed into ptrace_syscall_faked, and a new ptrace_syscall_errno test will be added.

  == Test ==
  Patch tested with different arch (amd64 / power8 / arm64 / i386), the new test will pass on them except for PowerPC.

  Although the faked (bug 1829363) and errno (bug 1829359) test will
  fail on PowerPC, it's actually helping us to nail down a real issue in
  our kernel.

  == Regression Potential ==
  Low, changes limited to the testing tool in the kernel.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-43-generic 4.15.0-43.46
  ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
  Uname: Linux 4.15.0-43-generic ppc64le
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Jan 22 04:30 seq
   crw-rw---- 1 root audio 116, 33 Jan 22 04:30 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
  ApportVersion: 2.20.9-0ubuntu7.5
  Architecture: ppc64el
  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: Tue Jan 22 06:09:34 2019
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
  Lsusb:
   Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  PciMultimedia:

  ProcFB:

  ProcKernelCmdLine: root=/dev/mapper/mpath0-part2 ro console=hvc0
  ProcLoadAvg: 0.13 0.34 0.23 1/1487 35882
  ProcSwaps:
   Filename				Type		Size	Used	Priority
   /swap.img                               file		8388544	0	-2
  ProcVersion: Linux version 4.15.0-43-generic (buildd@bos02-ppc64el-020) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #46-Ubuntu SMP Thu Dec 6 14:43:28 UTC 2018
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-43-generic N/A
   linux-backports-modules-4.15.0-43-generic  N/A
   linux-firmware                             1.173.3
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  VarLogDump_list: total 0
  cpu_cores: Number of cores present = 20
  cpu_coreson: Number of cores online = 20
  cpu_dscr: DSCR is 0
  cpu_freq:
   min:	3.694 GHz (cpu 152)
   max:	3.694 GHz (cpu 1)
   avg:	3.694 GHz
  cpu_runmode:
   Could not retrieve current diagnostics mode,
   No kernel interface to firmware
  cpu_smt: SMT=8

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1812796/+subscriptions