Kernel panic - not syncing: Attempted to kill init! exitcode=0x00007f00 - Not able to resolve

I am facing a Kernel panic from which I am not able to solve my way out. I saw some posts regarding the same but none seems to be conclusive. I am trying on a Raspberry Pi 4B hardware to build and use my own Bootloader and Linux version. **U-Boot: v2020.07** **Linux Kernel: v5.8.9** Used busybox to prepare my Root-FS which seems to be mounted, as per what I see on console. This is where I get stuck at the end: Can you please help on what the issue could be in my case?