[Bug 1567037] Re: lxc-attach crashed with SIGSEGV in get_pty_on_host()

[Serge Hallyn]

** Also affects: tzdata (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1567037

Title:
  lxc-attach crashed with SIGSEGV in get_pty_on_host()

Status in lxc package in Ubuntu:
  Fix Committed
Status in tzdata package in Ubuntu:
  New

Bug description:
  Installed unity8-lxc, ran unity8-setup, then rebooted.
  Login to unity8 lxc session failed (somehow nothing happened), then I logged into Unity7 and the crash happened.

  ProblemType: Crash
  DistroRelease: Ubuntu 16.04
  Package: lxc1 2.0.0~rc15-0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6
  Uname: Linux 4.4.0-17-generic x86_64
  ApportVersion: 2.20.1-0ubuntu1
  Architecture: amd64
  Date: Wed Apr  6 20:11:34 2016
  ExecutablePath: /usr/bin/lxc-attach
  InstallationDate: Installed on 2015-12-03 (124 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151203)
  ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-17-generic.efi.signed root=UUID=dccfbc3c-48bc-43ed-9881-36efaa2ef6c5 ro quiet splash vt.handoff=7
  SegvAnalysis:
   Segfault happened at: 0x563ee5318994 <main+884>:	movl   $0x1,0x1c(%r14)
   PC (0x563ee5318994) ok
   source "$0x1" ok
   destination "0x1c(%r14)" (0x0000001c) not located in a known VMA region (needed writable region)!
  SegvReason: writing NULL VMA
  Signal: 11
  SourcePackage: lxc
  Stacktrace:
   #0  0x0000563ee5318994 in main ()
   No symbol table info available.
  StacktraceTop: main ()
  ThreadStacktrace:
   .
   Thread 1 (Thread 0x7fe20540f840 (LWP 2993)):
   #0  0x0000563ee5318994 in main ()
   No symbol table info available.
  Title: lxc-attach crashed with SIGSEGV in main()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  defaults.conf:
   lxc.network.type = veth
   lxc.network.link = lxcbr0
   lxc.network.flags = up
   lxc.network.hwaddr = 00:16:3e:xx:xx:xx

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