Java (OpenJDK 9), 311 227 223 bytes

import sun.misc.*;import java.lang.reflect.*;class M{public static void main(String[]args) throws Exception{Constructor<Unsafe> c=Unsafe.class.getDeclaredConstructor();c.setAccessible(true);c.newInstance().getAddress(0);}}

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Ungolfed:

import sun.misc.Unsafe;

import java.lang.reflect.Constructor;

public class SegFault {

    public static void main(String[] args) throws Exception {
        Constructor<Unsafe> unsafeConstructor = Unsafe.class.getDeclaredConstructor();
        unsafeConstructor.setAccessible(true);
        Unsafe unsafe = unsafeConstructor.newInstance();
        System.out.println(unsafe.getAddress(0));
    }
}

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