** Attachment added: "dell-smm-hwmon.c"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1789519/+attachment/5185075/+files/dell-smm-hwmon.c

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https://bugs.launchpad.net/bugs/1789519

Title:
  Low Memory corruption logged in syslog

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Dell Inspiron 3847 Desktop running Ubuntu 18.04.1 LTS
  kernel: 4.15.0-33-generic

  Corrupted low memory messages logged in syslog

  Can be reproduced with script:

  #!/bin/bash

  # log to syslog...
  logger -st low_mem_corruption.sh "Checking for low memory corruption with 
kernel $(uname -rv)..."

  # this will cause syslog messages on affected kernels...
  cat /proc/i8k

  logger -st low_mem_corruption.sh "Please wait for 90 secs to ensure low 
memory test has completed..."
  # sleep for 1.5 mins - enough time for mem check every 60 secs...
  sleep 90
  logger -st low_mem_corruption.sh "Check for low memory corruption done! Was 
anything logged in syslog?"

  
  Kernels tested:
  Kernel 4.15.0-29-generic - fine
  Kernel 4.15.0-30-generic - fine
  Kernel 4.15.0-30-generic - Never installed, do not know - did it exist?
  Kernel 4.15.0-32-generic - Low Memory corruption!
  Kernel 4.15.0-33-generic - Low Memory corruption!

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-33-generic 4.15.0-33.36
  ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
  Uname: Linux 4.15.0-33-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  bossman    1316 F.... pulseaudio
   /dev/snd/pcmC1D0p:   bossman    1316 F...m pulseaudio
   /dev/snd/controlC1:  bossman    1316 F.... pulseaudio
  CurrentDesktop: ubuntu:GNOME
  Date: Tue Aug 28 16:56:01 2018
  HibernationDevice: RESUME=UUID=1c065a24-2acf-43dc-bf3d-1382f3bbf0ac
  InstallationDate: Installed on 2018-05-12 (108 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  MachineType: Dell Inc. Inspiron 3847
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-33-generic 
root=UUID=a5dec663-366e-4ecc-a17a-ce4219c54897 ro quiet loglevel=3 splash
  RelatedPackageVersions:
   linux-restricted-modules-4.15.0-33-generic N/A
   linux-backports-modules-4.15.0-33-generic  N/A
   linux-firmware                             1.173.1
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 05/10/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A10
  dmi.board.name: 088DT1
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 3
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA10:bd05/10/2018:svnDellInc.:pnInspiron3847:pvr:rvnDellInc.:rn088DT1:rvrA01:cvnDellInc.:ct3:cvr:
  dmi.product.family: To be filled by O.E.M.
  dmi.product.name: Inspiron 3847
  dmi.sys.vendor: Dell Inc.

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