** Attachment added: "4.15.0-54-generic #58+lp1835279 kernel log"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1835279/+attachment/5277230/+files/kernel-arighi.txt

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https://bugs.launchpad.net/bugs/1835279

Title:
  4.15.0-54.58-generic 4.15.18: oops/BUG on LUKS open

Status in linux package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  In Progress

Bug description:
  This is Linux version 4.15.0-54-generic (buildd@lgw01-amd64-014) (gcc
  version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #58-Ubuntu SMP Mon Jun
  24 10:55:24 UTC 2019 (Ubuntu 4.15.0-54.58-generic 4.15.18), from pc-
  kernel_240.snap

  Version signature: 4.15.0-54.58-generic 4.15.18

  Issue is non-deterministic, and happens in roughly 20% of the
  attempts.

  Running on: qemu-kvm, command line:  kvm \
    -bios /usr/share/ovmf/OVMF.fd \
    -smp 2 -m 512 -netdev 
user,id=mynet0,hostfwd=tcp::8022-:22,hostfwd=tcp::8090-:80 \
    -device virtio-net-pci,netdev=mynet0 \
    -drive file=pc.img,format=raw

  Commands that caused the problem:
  cryptsetup -q --type luks2 --key-file <keyfile> luksFormat /dev/sda4
  LD_PRELOAD=/lib/no-udev.so cryptsetup --type luks2 --key-file <keyfile> open 
/dev/sda4 crypt-data

  Notes:
  - See https://bugs.launchpad.net/ubuntu/+source/cryptsetup/+bug/1589083 for 
more information on the no-udev workaround.
  - The commands are scripted. Also tried to add a 200ms and 1s interval before 
opening the device.

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