** Description changed:
+ [Impact]
+ Chainloading grub via grub in a netboot context using MAAS's Boot to local
disk feature.
+
+ [Test cases]
+ 1) Deploy UEFI system using MAAS
+ 2) After deployment, have the system reboot to local disk (via netboot).
+
+ [Regression potential]
+ It is possible that the changes to chainloading logic that evaluates the
sizes for various sections of code that gets copied to memory to load the next
bootloader might fail to correctly evaluate the sections, or otherwise copy
sections incorrectly, but this regression scenario is indistinguishable from
the current case, there the system fails to load the next bootloader anyway.
Error messages may vary, but the net result for a regression would be an
incorrectly loaded bootloader, and thus error messages at boot from grub.
+
+ ---
+
We have had several nodes that had been deployed on Sept. 12 and were
booting correctly fail to boot.
On the console and during tracing we could see they were getting dhcp
and pxe information, but then errored out with "relocation failed",
dropping into a fallback grub menu with a Local boot option.
After copying over bootx64.efi grubx64.efi from
https://images.maas.io/ephemeral-v3/daily/bootloaders/uefi/amd64/20180906.0/
instead of 20180913.0/ and rebooting, boot would commence successfully.
Hardware: Dell R640
maas 2.3.5-6511-gf466fdb-0ubuntu1~16.04.1
** Also affects: grub2 (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: shim (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: grub2-signed (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: grub2 (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: shim (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: grub2-signed (Ubuntu Bionic)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1792575
Title:
Boot failure with efi shims from 20180913.0
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