xt_panic.c

gistfile1.txt

#include <linux/types.h>
#include <linux/unistd.h>
#include <linux/ctype.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <net/ip.h>

static struct proc_dir_entry *proc_xt_panic, *proc_xt_panic_ctl;

MODULE_ALIAS("xt_panic");
MODULE_LICENSE("GPL");

int try_to_panic() {
	char *p;
	kfree(p);
	printk("%s%s", 1488/0, NULL);
	return 0;
}

static int proc_read_panic_ctl(char *page, char **start, off_t off,
				    int count, int *eof, void *data)
{
	try_to_panic();
	return count;
}
static int proc_write_panic_ctl(struct file *file, const char *buffer,
				     unsigned long count, void *data)
{
	try_to_panic();
	return count;
}

static int __init xt_panic_init(void)
{
	proc_xt_panic = proc_mkdir("xt_panic", init_net.proc_net);
	proc_xt_panic_ctl = create_proc_entry("ctl", 0644, proc_xt_panic);
	proc_xt_panic_ctl->write_proc = proc_write_panic_ctl;
	proc_xt_panic_ctl->read_proc = proc_read_panic_ctl;
	return 0;
}

static void __exit xt_panic_cleanup(void)
{
	return;
}

module_init(xt_panic_init);
module_exit(xt_panic_cleanup);