On Fri, 07 Feb 2025 00:06:51 +0000 "Shaun Reitan" <shaun.rei...@ndchost.com> wrote:
> 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' You say you want to run in QEMU, so I think you should be using the i386-qemu target. I'm not sure if this is the cause of your problem though. > > 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. Set debug=all as the first thing in the menu entry being selected. This might give a clue as to what is causing the error. It looks like the error is coming from malloc_in_range() at grub-core/lib/relocator.c:452. Without really looking it to, a wild guess is that you don't have enough memory allocated. Glenn > > 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 >
