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[Jürg Häfliger <1829363@xxxxxxxxxxxxxxxxxx>]

** Tags added: kernel-daily-bug

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https://bugs.launchpad.net/bugs/1829363

Title:
  TRACE_syscall.ptrace_syscall_faked 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:
  This test will fail on Bionic / Cosmic PowerPC:

  [ RUN      ] TRACE_syscall.ptrace_syscall_faked
  seccomp_bpf.c:1837:TRACE_syscall.ptrace_syscall_faked:Expected 45000 (45000) == syscall(207) (18446744073709551615)
  TRACE_syscall.ptrace_syscall_faked: Test failed at step #13
  [     FAIL ] TRACE_syscall.ptrace_syscall_faked

  This test will pass on PowerPC with Disco kernel.

  As this issue can be reproduced with the upsteam kernel tree, so it
  looks like a kernel issue instead of a test case issue to me.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.18.0-20-generic 4.18.0-20.21~18.04.1
  ProcVersionSignature: Ubuntu 4.18.0-20.21~18.04.1-generic 4.18.20
  Uname: Linux 4.18.0-20-generic ppc64le
  ApportVersion: 2.20.9-0ubuntu7.6
  Architecture: ppc64el
  Date: Thu May 16 09:59:19 2019
  ProcLoadAvg: 0.07 0.40 0.68 1/1315 7583
  ProcLocks:
   1: POSIX  ADVISORY  WRITE 1767 00:17:402 0 EOF
   2: POSIX  ADVISORY  WRITE 3941 00:17:825 0 EOF
   3: FLOCK  ADVISORY  WRITE 3492 00:17:390 0 EOF
   4: FLOCK  ADVISORY  WRITE 3947 00:17:820 0 EOF
   5: POSIX  ADVISORY  WRITE 3872 00:17:799 0 EOF
  ProcSwaps:
   Filename				Type		Size	Used	Priority
   /swap.img                               file		8388544	0	-2
  ProcVersion: Linux version 4.18.0-20-generic (buildd@bos02-ppc64el-019) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #21~18.04.1-Ubuntu SMP Wed May 8 08:51:08 UTC 2019
  SourcePackage: linux-signed-hwe
  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 159)
   max:	3.695 GHz (cpu 0)
   avg:	3.694 GHz
  cpu_runmode:
   Could not retrieve current diagnostics mode,
   No kernel interface to firmware
  cpu_smt: SMT=8

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