[Bug 1851190] [NEW] Ubuntu 18.04: kexec-tool shows "kexec: elfcorehdr doesn't fit cells-size" if crashkernel reserved beyond 4GB

[Prabhakar Kushwaha]

Public bug reported:

Kexec tool throws following errors if crashkernel is reserved beyond 4GB
of system memory.

bootargs:  crashkernel=1G at 4G

Ubuntu
$ kexec -p /boot/vmlinuz-`uname -r` --initrd=/boot/initrd.img-`uname
-r` --reuse-cmdline
$ kexec: elfcorehdr doesn't fit cells-size.
$ kexec: setup_2nd_dtb failed.
$ kexec: load failed.
$ Cannot load /boot/vmlinuz-5.4.0-rc4+

It looks to be grub issue. Refer discussion:
https://edk2.groups.io/g/devel/topic/39480086#49583

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1851190

Title:
  Ubuntu 18.04: kexec-tool shows "kexec: elfcorehdr doesn't fit cells-
  size" if crashkernel reserved beyond 4GB

Status in grub2 package in Ubuntu:
  New

Bug description:
  Kexec tool throws following errors if crashkernel is reserved beyond
  4GB of system memory.

  bootargs:  crashkernel=1G at 4G

  Ubuntu
  $ kexec -p /boot/vmlinuz-`uname -r` --initrd=/boot/initrd.img-`uname
  -r` --reuse-cmdline
  $ kexec: elfcorehdr doesn't fit cells-size.
  $ kexec: setup_2nd_dtb failed.
  $ kexec: load failed.
  $ Cannot load /boot/vmlinuz-5.4.0-rc4+

  It looks to be grub issue. Refer discussion:
  https://edk2.groups.io/g/devel/topic/39480086#49583

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