** Information type changed from Public to Public Security

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  gnome-shell hangs (goes into key repeat runaway) when key repeat is
  used on chromium-browser's address bar

Status in GNOME Shell:
Status in gnome-shell package in Ubuntu:

Bug description:
  GNOME Shell running in Wayland completely hangs when the key repeat
  rate is sufficiently high and used inside Chromium and/or Google
  Chrome. Then GNOME Shell, at-spi's dbus-daemon, ibus-daemon, and
  chromium-browser all get stuck at 100% CPU. GNOME Shell's RSS also
  quickly increases to >2GB and continues climbing.

  Attempting to kill chromium-browser in a separate TTY either causes one of 
two things:
   - gnome-shell, dbus-daemon and ibus-daemon remain at 100% CPU and stuck; or
   - gnome-shell temporarily recovers, then crashes, taking the entire session 
with it and returning to the login screen.

  Steps to reproduce:

  1. Set key repeat rates to a high value (these are my actual

  $ gsettings set org.gnome.desktop.peripherals.keyboard repeat-interval 3
  $ gsettings set org.gnome.desktop.peripherals.keyboard repeat true
  $ gsettings set org.gnome.desktop.peripherals.keyboard delay 180

  2. Start chromium-browser
  3. Focus the location bar in chromium-browser
  4. Press and hold a key (e.g. a) for a few seconds (~10 should do)
  5. Observe that gnome-shell probably has hung by this point. If it hasn't, 
proceed to step 6.
  6. Press and hold the backspace button until the location bar has cleared, 
then continue for another few seconds (~10 seconds should do)

  This also affected GNOME Shell 3.24, but I was able to reduce the chances of 
it happening by renicing my chromium processes to +10, thereby giving GNOME 
Shell a greater chance at the CPU.

  ProblemType: Bug
  DistroRelease: Ubuntu 17.10
  Package: gnome-shell 3.26.1-0ubuntu5
  Uname: Linux 4.13.4-hyper2+ x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.7-0ubuntu3.1
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Nov 10 16:50:13 2017
  DisplayManager: gdm3
  SourcePackage: gnome-shell
  UpgradeStatus: Upgraded to artful on 2017-11-04 (5 days ago)

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