[Bug 1829459] Re: qemu seems to lack support for pid namespace.

[Thomas Huth]

This is an automated cleanup. This bug report has been moved to QEMU's
new bug tracker on gitlab.com and thus gets marked as 'expired' now.
Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/172


** Changed in: qemu
       Status: New => Expired

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #172
   https://gitlab.com/qemu-project/qemu/-/issues/172

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https://bugs.launchpad.net/bugs/1829459

Title:
  qemu seems to lack support for pid namespace.

Status in QEMU:
  Expired

Bug description:
  # Version

  qemu-4.0.0
  glibc-2.28

  # commands used to launch qemu-aarch64 in user mode.

  : ${QEMU_BINFMT_FLAGS:=OC}

  printf '%s\n' ':qemu-
  
aarch64:M::\x7fELF\x02\x01\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\xb7\x00:\xff\xff\xff\xff\xff\xff\xff\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfe\xff\xff\xff:/usr/bin
  /qemu-aarch64:'"${QEMU_BINFMT_FLAGS}"
  >/proc/sys/fs/binfmt_misc/register

  > sudo cp /usr/bin/qemu-aarch64 $RPI/usr/bin
  > sudo chroot $RPI /bin/ksh -l

  # host

  Gentoo Linux amd64

  # Guest

  Gentoo Linux aarch64

  # The problem that I have

  "emerge" program fails due to the error, "qemu: qemu_thread_create: Invalid 
argument".
  "emerge" is Gentoo's package manager that compiles and installs packages.

  # Workaround

  Disable pid-sandbox in emerge.

  # How to reproduce the issue

  Execute

  unshare --pid -- echo hello world

  or

  python -c "import portage.process; portage.process.spawn(['echo',
  'hello', 'world'], unshare_pid=True)"

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