LibreOffice Base still crash with test kernel:

~$ uname -a
Linux WS 4.4.0-112-generic #135~lp1699772v4 SMP Thu Feb 22 18:45:01 UTC 2018 
i686 i686 i686 GNU/Linux

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  linux-image-4.13.0-12-generic, linux-image-4.10.0-24-generic, linux-
  image-4.8.0-56-generic, linux-image-4.4.0-81-generic, linux-
  image-3.13.0-121-generic | Regression: many user-space apps crashing

Status in LibreOffice:
  Won't Fix
Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Artful:
  In Progress
Status in linux source package in Bionic:
  In Progress
Status in linux package in Debian:
  Fix Released

Bug description:
  Distribution: Ubuntu 16.04 x64 (Flavour: KDE Neon User Edition 5.10)

  linux-image-4.4.0-81-generic appears to contain a regression, probably
  related to the CVE-2017-1000364 fix backport / patch.

  Using this kernel, the Oracle Java browser plugin always crashes
  during stack-related actions on initialization. This means, the plugin
  completely stopped working.

  It works perfectly fine in linux-image-4.4.0-79-generic (vurlerable to 
CVE-2017-1000364) as well as linux-image-4.11.6-041106-generic, which also 
contains a fix for CVE-2017-1000364.

  uname -a:

  > Linux Zweiblum 4.4.0-81-generic #104-Ubuntu SMP Wed Jun 14 08:17:06
  UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

  I tested Oracle Java 1.8 u131 as well as 1.6 u64 in Firefox 51.0.1 as
  well as Iceweasel / Firefox/3.5.16 in a chroot.

  Using linux-image-4.4.0-81-generic it crashes in all combinations
  while with both other kernels it works.

  I was not able to obtain any detailed crash information from Firefox 51.0.1, 
but Iceweasel 3.5.16 crashed completely, allowing me to obtain a stack trace 
which shows the relation to stack operations performed by the plugin, even 
without proper debug symbols:

  > (gdb) bt full
  > #0  0x00007fa06d805307 in _expand_stack_to(unsigned char*) () from 
  > No symbol table info available.
  > #1  0x00007fa06d8053ae in os::Linux::manually_expand_stack(JavaThread*, 
unsigned char*) ()
  >    from /opt/java-8-oracle/jre/lib/amd64/server/
  > No symbol table info available.
  > #2  0x00007fa06d80cf0b in JVM_handle_linux_signal () from 
  > No symbol table info available.
  > #3  0x00007fa06d802e13 in signalHandler(int, siginfo*, void*) () from 
  > No symbol table info available.
  > #4  <signal handler called>

  I first assumed a bug in the Java plugin, but it works fine in Linux 4.11.6.

  The crash will be triggered by any applet, for example the test applet at:


  I'm running the Ubuntu 16.04 based KDE Neon distribution which somehow 
apparently does not allow me to use apport to report this bug:

  > $ LANG= apport-cli linux-image-4.4.0-81-generic
  > *** Collecting problem information
  > The collected information can be sent to the developers to improve the
  > application. This might take a few minutes.
  > .........
  > *** Problem in linux-image-4.4.0-81-generic
  > The problem cannot be reported:
  > This is not an official KDE package. Please remove any third party package 
and try again.

  If someone can tell me how to get apport working for this package, I
  can use it to collect additional information, but (unfortunately?) the
  problem should be fairly easy to reproduce...

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