[Bug 1676924] [NEW] Grub installer crashes during install onto pre-existing partitionable md RAID

[Tony Travis]

Public bug reported:

# Boot from Ubuntu 16.0.4 LTS USB-stick
# Try Ubuntu without installing

# Terminal on the live USB desktop
sudo -i
apt update
apt install mdadm
for i in /dev/sd[acde]; do parted $i -- mklabel msdos; done
for i in /dev/sd[acde]; do parted $i -- unit MiB mkpart primary 0% 100%; done
for i in /dev/sd[acde]; do parted $i -- set 1 raid on; done
for i in /dev/sd[acde]; do parted $i -- set 1 boot on; done
mdadm -C /dev/md0 -l 10 -n 4 /dev/sd[acde]1

# Run Ubiquity installer
# Crash during grub-install to boot sector of RAID component drives /dev/sd[acde]

# Fix
mount -bind /proc /target/proc
debian_chroot=CHROOT chroot /target
apt update
apt install mdadm
grub-install /dev/sda
grub-install /dev/sdc
grub-install /dev/sdd
grub-install /dev/sde

# edit /etc/default/grub
root at ubuntu:/target/etc/default# diff -Naur grub.dist grub
--- grub.dist	2017-02-15 20:36:33.000000000 +0000
+++ grub	2017-03-28 16:03:02.383707194 +0100
@@ -8,7 +8,7 @@
 GRUB_HIDDEN_TIMEOUT_QUIET=true
 GRUB_TIMEOUT=10
 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
-GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
+GRUB_CMDLINE_LINUX_DEFAULT="bootdegraded=yes"
 GRUB_CMDLINE_LINUX=""
 
 # Uncomment to enable BadRAM filtering, modify to suit your needs

# leave CHROOT
exit

# Reboot from /dev/sda

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.3
ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
Uname: Linux 4.8.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: amd64
CasperVersion: 1.376.2
Date: Tue Mar 28 16:03:57 2017
InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash ---
LiveMediaBuild: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
ProcEnviron:
 LANGUAGE=en_GB.UTF-8
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug ubiquity-2.21.63.3 ubuntu xenial

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https://bugs.launchpad.net/bugs/1676924

Title:
  Grub installer crashes during install onto pre-existing partitionable
  md RAID

Status in grub-installer package in Ubuntu:
  New

Bug description:
  # Boot from Ubuntu 16.0.4 LTS USB-stick
  # Try Ubuntu without installing

  # Terminal on the live USB desktop
  sudo -i
  apt update
  apt install mdadm
  for i in /dev/sd[acde]; do parted $i -- mklabel msdos; done
  for i in /dev/sd[acde]; do parted $i -- unit MiB mkpart primary 0% 100%; done
  for i in /dev/sd[acde]; do parted $i -- set 1 raid on; done
  for i in /dev/sd[acde]; do parted $i -- set 1 boot on; done
  mdadm -C /dev/md0 -l 10 -n 4 /dev/sd[acde]1

  # Run Ubiquity installer
  # Crash during grub-install to boot sector of RAID component drives /dev/sd[acde]

  # Fix
  mount -bind /proc /target/proc
  debian_chroot=CHROOT chroot /target
  apt update
  apt install mdadm
  grub-install /dev/sda
  grub-install /dev/sdc
  grub-install /dev/sdd
  grub-install /dev/sde

  # edit /etc/default/grub
  root at ubuntu:/target/etc/default# diff -Naur grub.dist grub
  --- grub.dist	2017-02-15 20:36:33.000000000 +0000
  +++ grub	2017-03-28 16:03:02.383707194 +0100
  @@ -8,7 +8,7 @@
   GRUB_HIDDEN_TIMEOUT_QUIET=true
   GRUB_TIMEOUT=10
   GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
  -GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
  +GRUB_CMDLINE_LINUX_DEFAULT="bootdegraded=yes"
   GRUB_CMDLINE_LINUX=""
   
   # Uncomment to enable BadRAM filtering, modify to suit your needs

  # leave CHROOT
  exit

  # Reboot from /dev/sda

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.3
  ProcVersionSignature: Ubuntu 4.8.0-36.36~16.04.1-generic 4.8.11
  Uname: Linux 4.8.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.5
  Architecture: amd64
  CasperVersion: 1.376.2
  Date: Tue Mar 28 16:03:57 2017
  InstallCmdLine: file=/cdrom/preseed/ubuntu.seed boot=casper initrd=/casper/initrd.lz quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  ProcEnviron:
   LANGUAGE=en_GB.UTF-8
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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