Hi does this happen on Ubuntu 18.04 or 16.04.5 ? (because kernel it's '4.15')
lsb_release -a

Since libc 2.23 is mentioned I assume it's 16.04.5.
apt-cache policy libc6 linux-generic

Please can you share a dump?
As well as the 'dbginfo' output?

The z/VM version seems to be 6.4 - do you know if that happens on LPAR,
too?


** Changed in: ubuntu-z-systems
   Importance: Undecided => High

** Changed in: ubuntu-z-systems
       Status: New => Incomplete

** Changed in: ubuntu-z-systems
     Assignee: (unassigned) => Canonical Kernel Team (canonical-kernel-team)

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https://bugs.launchpad.net/bugs/1831899

Title:
  Kernel Oops 3b in libc-2.23 unable to handle pointer dereference in
  kernel virtual address space

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