Image illustrating how a NOP-sled payload looks on the stack.
<a href="//commons.wikimedia.org/wiki/User:Ahnode" title="User:Ahnode">Ahnode</a>
<a href="https://en.wikipedia.org/wiki/File:NopSled.png" class="extiw" title="en:File:NopSled.png">en:File:NopSled.png</a> by <a href="https://en.wikipedia.org/wiki/User:Abaddon314159" class="extiw" title="en:User:Abaddon314159">Michael Lynn</a>