You are right. This is NOT the same bug but stunningly happens with this kernel 
while the "share + more actions" on firefox worked fine with the ubuntu kernel.


Here is the relevant entry in the syslog:

May 11 16:40:30 Murat-Laptop dbus-daemon[1834]: Activating service 
name='org.gnome.GConf'
May 11 16:40:30 Murat-Laptop dbus-daemon[1834]: Successfully activated service 
'org.gnome.GConf'
May 11 16:40:32 Murat-Laptop unity-panel-ser[2370]: Already have a menu for 
window ID 65011728 with path /com/canonical/menu/3E00010 from :1.106, 
unregistering that one
May 11 16:40:32 Murat-Laptop unity-panel-ser[2370]: Already have a menu for 
window ID 65011728 with path /com/canonical/menu/3E00010 from :1.106, 
unregistering that one
May 11 16:40:33 Murat-Laptop compiz[2359]: 
1494535233840#011FirefoxAccounts#011ERROR#011Background refresh of profile 
failed, bumping _cachedAt: {"name":"FxAccountsProfileClientError","code":3
04,"errno":997,"error":"PARSE_ERROR","message":null}
May 11 16:40:34 Murat-Laptop systemd[1]: Starting Stop ureadahead data 
collection...
May 11 16:40:34 Murat-Laptop systemd[1]: Started Stop ureadahead data 
collection.
May 11 16:40:56 Murat-Laptop compiz[2359]: Vector smash protection is enabled.
May 11 16:48:54 Murat-Laptop unity-panel-ser[2370]: Already have a menu for 
window ID 67109067 with path /com/canonical/menu/40000CB from :1.113, 
unregistering that one

There is 8 minutes of silence after the crash between 16:40 and 16:48,
where I instinctively pressed alt+sysrqE to failure of reboot!

I CAN reproduce this particular error, which clearly is NOT the bug we
are dealing with on this thread, following the same steps. Actually you
can try this by clicking on "Share this page" icon on firefox and then
the + icon to install more social actions.

You CAN kill the stalled Firefox processs from a terminal.

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1674838

Title:
  kernel BUG at /build/linux-
  7LGLH_/linux-4.10.0/include/linux/swapops.h:129

Status in linux package in Ubuntu:
  In Progress
Status in linux-hwe-edge package in Ubuntu:
  In Progress
Status in linux source package in Zesty:
  In Progress
Status in linux-hwe-edge source package in Zesty:
  In Progress

Bug description:
  Randomly, khugepaged process will take 100% CPU, and I can only
  restart the computer to recover it.

  Relevant dmesg attached (dmesg_crash.txt).

  ProblemType: Bug
  DistroRelease: Ubuntu 17.04
  Package: linux-image-4.10.0-14-generic 4.10.0-14.16
  ProcVersionSignature: Ubuntu 4.10.0-14.16-generic 4.10.3
  Uname: Linux 4.10.0-14-generic x86_64
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  mathieu    2221 F.... pulseaudio
   /dev/snd/pcmC1D0p:   mathieu    2221 F...m pulseaudio
   /dev/snd/controlC1:  mathieu    2221 F.... pulseaudio
  CurrentDesktop: Unity:Unity7
  Date: Tue Mar 21 23:03:23 2017
  HibernationDevice: RESUME=UUID=67e78e4c-94ee-447c-ae60-4387dae296dd
  InstallationDate: Installed on 2016-01-31 (415 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160131)
  MachineType: LENOVO 20344
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-14-generic 
root=UUID=b982929e-11d0-4984-885c-6c9daba24836 ro noprompt quiet splash 
vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-4.10.0-14-generic N/A
   linux-backports-modules-4.10.0-14-generic  N/A
   linux-firmware                             1.164
  SourcePackage: linux
  UpgradeStatus: Upgraded to zesty on 2017-03-02 (19 days ago)
  dmi.bios.date: 10/16/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 96CN29WW(V1.15)
  dmi.board.asset.tag: 31900058WIN
  dmi.board.name: INVALID
  dmi.board.vendor: LENOVO
  dmi.board.version: 31900058WIN
  dmi.chassis.asset.tag: 31900058WIN
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Lenovo Yoga 2 13
  dmi.modalias: 
dmi:bvnLENOVO:bvr96CN29WW(V1.15):bd10/16/2014:svnLENOVO:pn20344:pvrLenovoYoga213:rvnLENOVO:rnINVALID:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoYoga213:
  dmi.product.name: 20344
  dmi.product.version: Lenovo Yoga 2 13
  dmi.sys.vendor: LENOVO

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