Re: [RFC PATCH v3 13/13] kasan: introduce inline instrumentation

From: Andrey Ryabinin
Date: Mon Sep 29 2014 - 10:34:52 EST

On 09/29/2014 06:28 PM, Dmitry Vyukov wrote:
> On Fri, Sep 26, 2014 at 9:33 PM, Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx> wrote:
>> 2014-09-26 21:18 GMT+04:00 Dmitry Vyukov <dvyukov@xxxxxxxxxx>:
>>> Yikes!
>>> So this works during bootstrap, for user memory accesses, valloc
>>> memory, etc, right?
>> Yes, this works. Userspace memory access in instrumented code will
>> produce general protection fault,
>> so it won't be unnoticed.
> Great!
> What happens during early bootstrap when shadow is not mapped yet?

Shadow mapped very early. Any instrumented code executes only after shadow mapped.
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