touch-packages team mailing list archive

[James Hunt <james.hunt@xxxxxxxxxxxxx>]

Playing around with strings(1), I've found this:

$ strings /usr/lib/chromium-browser/libs/libcontent.so|egrep "\<init\>"
init
The SUID sandbox created a new PID namespace but Zygote is not the init process. Please, make sure the SUID binary is up to date.
Error creating an init process to reap zombies
Failed to init random generator!
Failed to init data channel.
SRTP reset to init state
Failed to init SRTP, err=
Image size must match encoder init configuration size
.init

----------

The key terms here are:

- "Error creating an init process to reap zombies"
- "SUID binary"

See:
https://code.google.com/p/chromium/codesearch#chromium/src/content/zygote/zygote_main_linux.cc&sq=package:chromium

It appears chromium creates PID namespaces, probably to run plugins/tabs
in an isolated environment. But each pid namespace needs a PID 1
process. So, one possibility is that chromium is inadvertently forking
and exec'ing "init" (ie "/sbin/init") rather than its own init
implementation of an init daemon ("/opt/google/chrome-unstable/chrome
--type=zygote"?). And that init (be it upstart or systemd) is crashing
as it's being run in a very unusual environment.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to upstart in Ubuntu.
https://bugs.launchpad.net/bugs/1300235

Title:
  init (chromium-browser) crashed with SIGSEGV

Status in upstart package in Ubuntu:
  Triaged

Bug description:
  none

  ProblemType: Crash
  DistroRelease: Ubuntu 14.04
  Package: upstart 1.12.1-0ubuntu1
  Uname: Linux 3.14.0-031400rc8-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.3-0ubuntu1
  Architecture: amd64
  Date: Mon Mar 31 09:53:16 2014
  Disassembly: => 0x7fa2b65e94d7:	Cannot access memory at address 0x7fa2b65e94d7
  ExecutablePath: /sbin/init
  InstallationDate: Installed on 2014-03-05 (25 days ago)
  InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140305)
  ProcCmdline: /sbin/init
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  ProcKernelCmdline: BOOT_IMAGE=/boot/vmlinuz-3.14.0-031400rc8-generic root=UUID=bef08855-3273-4d41-ac06-bad06bdd08a4 ro quiet splash
  SegvAnalysis:
   Segfault happened at: 0x7fa2b65e94d7:	Cannot access memory at address 0x7fa2b65e94d7
   PC (0x7fa2b65e94d7) not located in a known VMA region (needed executable region)!
   Stack pointer not within stack segment
  SegvReason: executing unknown VMA
  Signal: 11
  SourcePackage: upstart
  StacktraceTop:
   ?? ()
   ?? ()
   ?? ()
  Title: init crashed with SIGSEGV
  UpgradeStatus: No upgrade log present (probably fresh install)
  UpstartBugCategory: System
  UpstartRunningSystemVersion: init (upstart 1.12.1)
  UserGroups:
   
  modified.conffile..etc.default.cups: [modified]
  mtime.conffile..etc.default.cups: 2014-03-11T13:23:34.740893

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1300235/+subscriptions