[Bug 1947046] Re: EFI stub: ERROR: FIRMWARE BUG: kernel image not aligned on 64k boundary

[Julian Andres Klode]

2.06-2ubuntu5 should fix this issue for insecure boot cases, a future
version will also fix secure boot use cases, but the new code is
undergoing security review.

SRUs might pick up the new code, or use the rhboot code, not decided
yet.

** Changed in: grub2 (Ubuntu Jammy)
       Status: In Progress => Fix Committed

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Title:
  EFI stub: ERROR: FIRMWARE BUG: kernel image not aligned on 64k
  boundary

Status in grub2 package in Ubuntu:
  Fix Committed
Status in grub2 source package in Jammy:
  Fix Committed

Bug description:
  [Impact]
  Recent kernels emit the following error message when booting on arm64 platforms:

    EFI stub: ERROR: FIRMWARE BUG: kernel image not aligned on 64k
  boundary

  While this doesn't appear to cause any functional issues - and indeed,
  the kernel commit that added the error[*] says "We can deal with this,
  but let's check for this condition anyway", it is still likely to
  cause user concern.

  [*]
  https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c32ac11da3f83bb42b986702a9b92f0a14ed4182

  [Test Case]
  Boot a recent kernel on an EFI-based arm64 system (impish will do, but the kernel patch is also hitting kernels in older releases). This message will be emitted after GRUB execs the kernel EFI stub.

  [Fix]
  https://github.com/rhboot/grub2/commit/6a5babc21e3ec665e0bae30e399db296451c121e

  [What Could Go Wrong]

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