[Bug 2002226] Re: Support for kernels compiled with CONFIG_EFI_ZBOOT

[Julian Andres Klode]

** Description changed:

- Arm64 kernels compiled with CONFIG_EFI_ZBOOT=y don't use the
- ARM64_IMAGE_MAGIC ('ARM\x64') but LINUX_PE_MAGIC (0x818223cd) in the PE
- Header. Our GRUB fails to boot such a kernel.
+ [Impact]
+ Arm64 kernels compiled with CONFIG_EFI_ZBOOT=y don't use the ARM64_IMAGE_MAGIC ('ARM\x64') but LINUX_PE_MAGIC (0x818223cd) in the PE Header. Our GRUB fails to boot such a kernel.
  
  We should eliminate the following check:
  
  grub-core/loader/efi/linux.c:75:
-   if (lh->magic != GRUB_LINUX_ARCH_MAGIC_SIGNATURE)
-     return grub_error(GRUB_ERR_BAD_OS, "invalid magic number");
+   if (lh->magic != GRUB_LINUX_ARCH_MAGIC_SIGNATURE)
+     return grub_error(GRUB_ERR_BAD_OS, "invalid magic number");
  
  This will allow any EFI binary to be run using the linux command.
+ 
+ [Test plan]
+ TBD
+ 
+ [Where problems could occur]
+ TBD

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https://bugs.launchpad.net/bugs/2002226

Title:
  Support for kernels compiled with CONFIG_EFI_ZBOOT

Status in grub2-unsigned package in Ubuntu:
  New

Bug description:
  [Impact]
  Arm64 kernels compiled with CONFIG_EFI_ZBOOT=y don't use the ARM64_IMAGE_MAGIC ('ARM\x64') but LINUX_PE_MAGIC (0x818223cd) in the PE Header. Our GRUB fails to boot such a kernel.

  We should eliminate the following check:

  grub-core/loader/efi/linux.c:75:
    if (lh->magic != GRUB_LINUX_ARCH_MAGIC_SIGNATURE)
      return grub_error(GRUB_ERR_BAD_OS, "invalid magic number");

  This will allow any EFI binary to be run using the linux command.

  [Test plan]
  TBD

  [Where problems could occur]
  TBD

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