Provoke FreeBSD kernel panic

Makefile

KMOD = panic
SRCS = panic.c

.include <bsd.kmod.mk>

panic.c

#include <sys/param.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/systm.h>

static int
panic_modevent(module_t mod __unused, int event, void* arg __unused){
        int error = 0;

        switch(event){
        case MOD_LOAD:
                uprintf("Goodbye!\n");
                memset(NULL, 0x42, 1000);
                break;
        default:
                error = EOPNOTSUPP;
                break;
        }

        return (error);
}

static moduledata_t panic_mod = {
        "panic",
        panic_modevent,
        NULL
};

DECLARE_MODULE(panic, panic_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);

Load with kldload(8)