Public bug reported:

1.$ lsb_release -rd
Description:    Ubuntu Artful Aardvark (development branch)
Release:        17.10

2. $ apt-cache policy linux-image-virtual
linux-image-virtual:
  Installed: 4.13.0.11.12
  Candidate: 4.13.0.11.12
  Version table:
 *** 4.13.0.11.12 500
        500 http://archive.ubuntu.com/ubuntu artful/main amd64 Packages
        100 /var/lib/dpkg/status


3. System shutsdown cleanly, qemu exits non-zero

4. System stays hung until testcase timesout.

Single VCPU kvm guest on Artful host.

Reached target Shutdown.
[   60.036030] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[   88.036012] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[   96.920015] INFO: rcu_sched detected stalls on CPUs/tasks:
[   96.920526]  (detected by 0, t=15002 jiffies, g=3321, c=3320, q=377)
[   96.921161] All QSes seen, last rcu_sched kthread activity 15002 
(4294916526-4294901524), jiffies_till_next_fqs=1, root ->qsmask 0x0
[   96.922409] rcu_sched kthread starved for 15002 jiffies! g3321 c3320 f0x2 
RCU_GP_WAIT_FQS(3) ->state=0x0
[  124.036015] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[  152.036020] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[  180.036016] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[  208.036013] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[  236.036015] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[  264.036012] watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd:1]
[  276.940010] INFO: rcu_sched detected stalls on CPUs/tasks:
[  276.940520]  (detected by 0, t=60007 jiffies, g=3321, c=3320, q=377)
[  276.941088] All QSes seen, last rcu_sched kthread activity 60007 
(4294961531-4294901524), jiffies_till_next_fqs=1, root ->qsmask 0x0
[  276.942165] rcu_sched kthread starved for 60007 jiffies! g3321 c3320 f0x2 
RCU_GP_WAIT_FQS(3) ->state=0x0

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-11-generic 4.13.0-11.12
ProcVersionSignature: User Name 4.13.0-11.12-generic 4.13.1
Uname: Linux 4.13.0-11-generic x86_64
AlsaDevices:
 total 0
 crw-rw---- 1 root audio 116,  1 Oct  9 15:06 seq
 crw-rw---- 1 root audio 116, 33 Oct  9 15:06 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', 
'/dev/snd/timer'] failed with exit code 1:
CRDA: N/A
Date: Mon Oct  9 15:13:30 2017
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig'
Lsusb: Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: QEMU Standard PC (i440FX + PIIX, 1996)
PciMultimedia:
 
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
ProcFB:
 
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-11-generic 
root=LABEL=cloudimg-rootfs ro console=tty1 console=ttyS0
RelatedPackageVersions:
 linux-restricted-modules-4.13.0-11-generic N/A
 linux-backports-modules-4.13.0-11-generic  N/A
 linux-firmware                             N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: SeaBIOS
dmi.bios.version: 1.10.2-1ubuntu1
dmi.chassis.type: 1
dmi.chassis.vendor: QEMU
dmi.chassis.version: pc-i440fx-artful
dmi.modalias: 
dmi:bvnSeaBIOS:bvr1.10.2-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-artful:cvnQEMU:ct1:cvrpc-i440fx-artful:
dmi.product.name: Standard PC (i440FX + PIIX, 1996)
dmi.product.version: pc-i440fx-artful
dmi.sys.vendor: QEMU

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug artful curtin uec-images

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https://bugs.launchpad.net/bugs/1722311

Title:
  softlockups/rcu sched

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