From: Eric Wong <normalperson@...>
Date: 2012-03-24T13:46:09+09:00
Subject: Re: Write to kernel buffer?

ruby rub <lists@ruby-forum.com> wrote:
> It isn't possible to clear keyboard buffers? Wow this + lack of ability 
> to clear kernel buffers makes secure wipes of password from memory 
> impossible, how unfortunate. Are there bad ways to try to force it from 
> userspace?

Maybe there's some ioctls, but hardly standardized.  On the other hand,
if your kernel is buggy/compromised and not wiping memory when new
apps need it, I think you're screwed anyways.

Machines for large financial institutions and businesses process
countless logins every day without explicitly wiping kernel/hardware
buffers.
I think your use of StringIO to wipe a buffer is secure enough :)