Re: Driver Verifier in a VM

> Does anyone have any experience using driver verifier inside a VM
> (VMware specifically)?

Do this all the time. Works great, the only issue is that the Verifier
overhead can sometimes be felt a lot worse.

> had a lot of BSODs regarding the use of user mode handles in the
> kernel, whcih makes snese since the VM kernel IS in usermode.

You're misunderstanding. That's a legitimate Verifier bugcheck that needs to
be fixed, see:

http://analyze-v.com/?p=404

-scott

--
Scott Noone
Consulting Associate
OSR Open Systems Resources, Inc.
http://www.osronline.com



"matt_sykes" <> wrote in message
news:2acbad91-96dc-4c5a-b160-...
> Hi all
>
> Does anyone have any experience using driver verifier inside a VM
> (VMware specifically)?
>
> I am thinking that although its quicker to change a VM image than re-
> ghost a machine (for testing on multiple platforms) there might well
> be many issues using Verifier inside a VM. After a brief attempt I
> had a lot of BSODs regarding the use of user mode handles in the
> kernel, whcih makes snese since the VM kernel IS in usermode. I didnt
> get any further than that though.
>
> Thanks in advance.
>

"matt_sykes" <> wrote in message
news:769d445f-c1e9-42ed-a165->>

>> > had a lot of BSODs regarding the use of user mode handles in the
>> > kernel, whcih makes snese since the VM kernel IS in usermode.

Kernel mode is kernel mode even in VM.

Verifier catches you when you call ZwClose instead of NtClose, or other Zw
functions on user handles.
IIRC, only Win7 or Vista SP2 verfier checks this; XP verifier does not.

Good luck,
-- pa