Hack-A-N900/Wall Of Bricks

Boot loop? hang? Congratulations, you made it! Please share how.

Tried to enforce bash as system default shell

How:

rm /bin/sh
ln -s /bin/bash /bin/sh

Result: boot loop.

Tried to overwrite /lib from a running system

How:

cp -a /somewhere/lib/* /lib/

Result:

Malfunction! Device shutdown in 10s

Tried to write a disk image to an extended partition

How:

# /dev/mmcblk0p4 is an extended partition
dd if=image.dd of=/dev/mmcblk0p4

Result: corrupt partition table

Tried to load and execute a custom build kernel during runtime (forced - without shutdown ;))

How:

kexec -f /boot/zImage --command-line="init=/sbin/preinit ubi.mtd=rootfs root=ubi0:rootfs rootfstype=ubifs \
rootflags=bulk_read,no_chk_data_crc rw console=ttyMTD,log console=tty0 snd-soc-rx51.hp_lim=42 snd-soc-tlv320aic3x.hp_dac_lim=6"

Result: corrupt partition table