panic!
💥 A module for kernel panic!
This module is for who want's to test their watchdog's loyalty.
Get a watchdog
The instruction is based on Debian distribution.
// Install watchdog
root@home:# apt-get install watchdog
// Modify watchdog condig
root@home:# vim /etc/watchdog
Here, we uncomment watchdog-device = /dev/watchdog and default value is exactly our hardware watchdog device /dev/watchdog. Then add a line watchdog-timeout = 5(if you don't add this line the default value is depends on your HW watchdog's setting). OK, now we have setup a loyalty watchdog for us. Let's try something dangerous 😈.
Build panic module
// Get this repo
git clone https://github.com/imZack/panic
// Here we cross compile module to our target, an arm embedded device
ARCH=arm CROSS_COMPILE=arm-none-linux-gnueabi- LINUX_SRC=/src/linux-3.8.13 make
// Tada~ you will get your panic.o now
Test
root@Moxa:~# insmod /home/panic.ko
Kernel panic - not syncing: Kernel Panic :)
Alternative (Linux Magic System Request Key Hacks)
Your kernel must compile with CONFIG_MAGIC_SYSRQ.
// Enable sysrq
root@home:# echo 1 > /proc/sys/kernel/sysrq
// Send magic key to trigger system crash
root@home:# echo "c" > /proc/sysrq-trigger
'c' - Will perform a system crash by a NULL pointer dereference. A crashdump will be taken if configured. More magic keys on Linux Magic System Request Key Hacks
References
License
GPL v2