load_options is broken.

[jclab-joseph]

See https://github.com/jclab-joseph/shim-cmdline-bug

When using chainloader in grub with Secure Boot ON, the value of cmdline (load_options) is broken.

cmdline: grub.cfg

search --file --set boot_root /linux.efi
echo "boot_root: ${boot_root}"
ls (${boot_root})/
if chainloader (${boot_root})/linux.efi console=tty1 rdinit=/bin/sh hello=world; then
  boot
else
  echo "FAILED"
fi

SECURE BOOT ON

=> NO /proc/cmdline !!!

If look at it in hex, you may see some unknown garbage values.

SECURE BOOT OFF

=> GOOD /proc/cmdline !!!

Reproduce:

git clone https://github.com/jclab-joseph/shim-cmdline-bug.git
cd shim-cmdline-bug/
git lfs pull
./start.sh