** Description changed:

  This issue is 100% reproducible. It looks like this has something to do
- with the kernel in proposed
+ with the Disco kernel in proposed (5.0.0-1014.14).
  
- Combinations:
+ Test combinations:
  kernel in updates + source code master branch = OK
  kernel in proposed + source code master-next branch = NOT OK
  kernel in proposed + source code master branch = NOT OK
-  
+ 
  The system will crash and reboot itself when testing:
  "Register/unregister many kprobe events"
  
  [33] Kprobe event with comm arguments [PASS]
  [34] Kprobe event string type argument        [PASS]
  [35] Kprobe event symbol argument     [PASS]
  [36] Kprobe event argument syntax     [PASS]
  [37] Kprobes event arguments with types       [PASS]
  [38] Kprobe event auto/manual naming  [PASS]
  [39] Kprobe dynamic event with function tracer        [PASS]
  [40] Kretprobe dynamic event with arguments   [PASS]
  [41] Kretprobe dynamic event with maxactive   [PASS]
  [42] Register/unregister many kprobe events
  packet_write_wait: Connection to 35.233.208.253 port 22: Broken pipe
  
  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-1014-gcp 5.0.0-1014.14
  ProcVersionSignature: Ubuntu 5.0.0-1014.14-gcp 5.0.21
  Uname: Linux 5.0.0-1014-gcp x86_64
  ApportVersion: 2.20.10-0ubuntu27.1
  Architecture: amd64
  Date: Tue Aug 20 08:13:13 2019
  SourcePackage: linux-signed-gcp
  UpgradeStatus: No upgrade log present (probably fresh install)

** Also affects: linux (Ubuntu Disco)
   Importance: Undecided
       Status: New

** Description changed:

  This issue is 100% reproducible. It looks like this has something to do
  with the Disco kernel in proposed (5.0.0-1014.14).
  
  Test combinations:
  kernel in updates + source code master branch = OK
  kernel in proposed + source code master-next branch = NOT OK
  kernel in proposed + source code master branch = NOT OK
  
  The system will crash and reboot itself when testing:
  "Register/unregister many kprobe events"
  
  [33] Kprobe event with comm arguments [PASS]
  [34] Kprobe event string type argument        [PASS]
  [35] Kprobe event symbol argument     [PASS]
  [36] Kprobe event argument syntax     [PASS]
  [37] Kprobes event arguments with types       [PASS]
  [38] Kprobe event auto/manual naming  [PASS]
  [39] Kprobe dynamic event with function tracer        [PASS]
  [40] Kretprobe dynamic event with arguments   [PASS]
  [41] Kretprobe dynamic event with maxactive   [PASS]
  [42] Register/unregister many kprobe events
  packet_write_wait: Connection to 35.233.208.253 port 22: Broken pipe
  
+ Tried with use "tail -f /var/log/syslog" and "dmesg -w" to see what
+ happened, but it will just disconnected and reboot itself.
+ 
+ 
  ProblemType: Bug
  DistroRelease: Ubuntu 19.04
  Package: linux-image-5.0.0-1014-gcp 5.0.0-1014.14
  ProcVersionSignature: Ubuntu 5.0.0-1014.14-gcp 5.0.21
  Uname: Linux 5.0.0-1014-gcp x86_64
  ApportVersion: 2.20.10-0ubuntu27.1
  Architecture: amd64
  Date: Tue Aug 20 08:13:13 2019
  SourcePackage: linux-signed-gcp
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/bugs/1840750

Title:
  [Potential Regression] System crashes when running ftrace test in
  ubuntu_kernel_selftests

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