Grub Boot Hole Crash
Revision as of 08:35, 3 August 2020 by Michael.mast (talk | contribs)
I was hit with the BootHole patch crash[1] on my personal server. Before I really knew what to do about it I had destroyed my boot partition trying to recover. The official steps from Red Hat[2] is to downgrade grub, shim, and mkotuil, then exclude them from updates. Though they quickly released a fixed shim file[3]
Before I knew what was going on I got frustrated and deleted the contents of my /boot, figuring I needed to learn how to recover this kind of failure. Then I went through the process.
- First I booted off install media and entered into recovery.
- Then I bound the install media to sysimage
mkdir /mnt/sysimage/install mount --bind /mnt/install/repo/BaseOS /mnt/sysimage/install chroot /mnt/sysimage/install
- I then removed all the old kernels, leaving just the latest one available to me.
set root=(hd0,gpt2) linuxefi /vmlinuz-4.18.0-193.14.2.el8_2.x86_64 root=/dev/mapper/OS-root initrdefi /initramfs-4.18.0-193.14.2.el8_2.x86_64.img relabled, rebooted, did again.
