Re: [PATCHv2] lkdtm: Add READ_AFTER_FREE test

From: Kees Cook
Date: Wed Feb 24 2016 - 18:37:58 EST

On Wed, Feb 24, 2016 at 1:48 PM, Kees Cook <keescook@xxxxxxxxxxxx> wrote:
> On Wed, Feb 24, 2016 at 11:40 AM, Laura Abbott <labbott@xxxxxxxxxx> wrote:
>> Yep, looks like the v1 patches and not the v2 patches which fix
>> a known issue with the zeroing.
> Ah-ha, I'll go find those and retest.

I sent out a series that was rebased. It works for me, but I want to
make sure I didn't make any glaring issues. I've also sent some fixes
to the lkdtm tests. One thing that stands out to me still is that the
READ_AFTER_FREE never shows poisoning. I remain confused, since
obviously if zeroing is working, it's being correctly poisoned...


Kees Cook
Chrome OS & Brillo Security