[Bug 1707792] Re: systemd-udevd crashed with SIGABRT in __epoll_wait_nocancel()

[Eliah Kagan]

*** This bug is a duplicate of bug 1705870 ***
    https://bugs.launchpad.net/bugs/1705870

** Attachment removed: "the output of dmesg"
   https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1707792/+attachment/4924803/+files/dmesg.txt

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Title:
  systemd-udevd crashed with SIGABRT in __epoll_wait_nocancel()

Status in systemd package in Ubuntu:
  New

Bug description:
  I don't know if this should be considered a bug in systemd or apport.

  systemd-udevd appears to crash with this bug on each boot. This is a
  fully updated Xubuntu Artful amd64 system (installed yesterday from
  the daily-live) with systemd 234-2ubuntu1, udev 234-2ubuntu1, apport
  2.20.6-0ubuntu4, and kernel version 4.11.0-12-generic. The system has
  no swap and runs inside a VMware Workstation 12.5.7 virtual machine
  (with open-vm-tools) on a Windows host. The host system has not
  approached memory exhaustion. I suspect these details may be relevant,
  because the host system sometimes experiences unexplained slowdowns
  when I/O is high. Note that I only suspect, and do not actually know
  for sure, that this bug may have been triggered by the host system's
  I/O problems.

  I only know about this crash because Apport notified me. Starting the
  system seems to take longer than it should; specifically, once the
  non-graphical login prompt is shown, it sometimes takes up to a minute
  for LightDM to appear. But I don't know if that is related, and beyond
  that, I have not observed anything going wrong on the system. When I
  originally installed this Ubuntu (guest) system, Apport did not inform
  me of a crash. Since then, the host system engaged in more intensive
  I/O, and also I enabled artful-proposed, and now the crash occurs. I
  don't know if either of these changes are relevant.

  This most resembles bug 1705870, which occurred in Artful with some
  slightly earlier package versions. Depending on the results of the
  symbolic retrace, I might mark this as a duplicate of that bug. It
  also resembles bug 1663995, bug 1506798, bug 1433320, and some of its
  (many) duplicates. That bug (i.e., bug 1433320) was considered to
  affect apport rather than systemd (see
  https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1433320/comments/10)
  and is considered fixed. (To a lesser extent, this bug resembles bug
  1437896, which that bug mentions, and which is considered a bug in
  systemd.)

  I have made /bin/sh a symlink to bash on this system instead of dash
  (because I am using this system to test
  http://www.linuxfromscratch.org/lfs/view/development/chapter02/mounting.html,
  which expects it). Aside from making startup scripts run a bit slower
  and increasing memory footprint slightly, I suspect this is irrelevant
  to this bug, but it's a significant (and *unusual*) change so I
  figured it is worth mentioning.

  ProblemType: Crash
  DistroRelease: Ubuntu 17.10
  Package: udev 234-2ubuntu1
  ProcVersionSignature: Ubuntu 4.11.0-12.17-generic 4.11.12
  Uname: Linux 4.11.0-12-generic x86_64
  ApportVersion: 2.20.6-0ubuntu4
  Architecture: amd64
  Date: Mon Jul 31 17:41:49 2017
  ExecutablePath: /lib/systemd/systemd-udevd
  InstallationDate: Installed on 2017-07-31 (0 days ago)
  InstallationMedia: Xubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170731)
  Lsusb:
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 002 Device 004: ID 0e0f:0008 VMware, Inc.
   Bus 002 Device 003: ID 0e0f:0002 VMware, Inc. Virtual USB Hub
   Bus 002 Device 002: ID 0e0f:0003 VMware, Inc. Virtual Mouse
   Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
  MachineType: VMware, Inc. VMware Virtual Platform
  ProcCmdline: /lib/systemd/systemd-udevd
  ProcEnviron:
   LANG=en_US.UTF-8
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.11.0-12-generic root=UUID=3ebdfb0d-efad-4049-955f-56e299d1acea ro quiet splash
  Signal: 6
  SourcePackage: systemd
  StacktraceTop:
   __epoll_wait_nocancel () at ../sysdeps/unix/syscall-template.S:84
   ?? ()
   ?? ()
   ?? ()
   __libc_start_main (main=0x1f82c781c0, argc=1, argv=0x7ffddfff7de8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffddfff7dd8) at ../csu/libc-start.c:291
  Title: systemd-udevd crashed with SIGABRT in __epoll_wait_nocancel()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

  dmi.bios.date: 07/02/2015
  dmi.bios.vendor: Phoenix Technologies LTD
  dmi.bios.version: 6.00
  dmi.board.name: 440BX Desktop Reference Platform
  dmi.board.vendor: Intel Corporation
  dmi.board.version: None
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 1
  dmi.chassis.vendor: No Enclosure
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnPhoenixTechnologiesLTD:bvr6.00:bd07/02/2015:svnVMware,Inc.:pnVMwareVirtualPlatform:pvrNone:rvnIntelCorporation:rn440BXDesktopReferencePlatform:rvrNone:cvnNoEnclosure:ct1:cvrN/A:
  dmi.product.name: VMware Virtual Platform
  dmi.product.version: None
  dmi.sys.vendor: VMware, Inc.

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