Just can seam to figure this out, 452: out of range pointer error

[Shaun Reitan]

I'm using qemu with KVM acceleration to boot an ubuntu 22.04 instance.  
The disk is a lvm that is flat. Not partitioning, just an ext4 
filesystem.  I've build a grub image to be used with the -kernel option 
of qemu.  I've also built and am using custom version of seabios with 
virtio support.

I'm building the grub kernel using the following command

/opt/grub2-i386/bin/grub-mkimage -O i386-pc -o grub.img normal biosdisk 
ext2 -p '(hd0)/boot/grub'

The idea here is that the grub kernel will load grub, it's config, and 
any required modules from the instances disk. I have successfully been 
able to do this with AlmaLinux/RHEL 9 but for some reason I cannot get 
it to work with Ubuntu 22.04 LTS.  Grub loads, I see the options as 
expected but when I select an option I immediately get the following 
error and I can't seam to figure out why.  It's driving me crazy.
!
452: out of range pointer: 0xbfec8630


Any idea's what's going on here?  Or how to figure out whats going on? 
Remember the disk is flat, no partitioning and no MBR.

On a side note, if I pull the vmlinuz and initrd from the disk image and 
use them with the -kernel and -initrd qemu params I am able to boot the 
instance.

--
Shaun Reitan