[Bug 1765126] [NEW] installer crashed. unable to install grub in dev/sda1

[pratikg]

*** This bug is a security vulnerability ***

Private security bug reported:

Description:	Ubuntu 16.04.4 LTS
Release:	16.04


a same error of installer getting crashed for every version installed.
error message:
Executing grub-install /dev/sda1 failed.
this is a fatal error.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: ubiquity 2.21.63.6 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
Uname: Linux 4.13.0-36-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
CasperVersion: 1.376.2
Date: Wed Apr 18 21:59:49 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
ProcEnviron:
 LANGUAGE=en_IN
 PATH=(custom, no user)
 LANG=en_IN
 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-2.21.63.6 ubuntu xenial

** Information type changed from Public to Private Security

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https://bugs.launchpad.net/bugs/1765126

Title:
  installer crashed. unable to install grub in dev/sda1

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Description:	Ubuntu 16.04.4 LTS
  Release:	16.04

  
  a same error of installer getting crashed for every version installed.
  error message:
  Executing grub-install /dev/sda1 failed.
  this is a fatal error.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63.6 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
  Uname: Linux 4.13.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  CasperVersion: 1.376.2
  Date: Wed Apr 18 21:59:49 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 16.04.4 LTS "Xenial Xerus" - Release amd64 (20180228)
  ProcEnviron:
   LANGUAGE=en_IN
   PATH=(custom, no user)
   LANG=en_IN
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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