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SubjectRe: [PATCH v2 12/12] driver: Google Memory Console
On Sun, Mar 13, 2011 at 9:54 PM, H. Peter Anvin <hpa@kernel.org> wrote:
> On 03/11/2011 05:43 PM, Mike Waychison wrote:
>> This patch introduces the 'memconsole' driver.
>>
>> Our firmware gives us access to an in-memory log of the firmware's
>> output.   This gives us visibility in a data-center of headless machines
>> as to what the firmware is doing.
>>
>> The memory console is found by the driver by finding a header block in
>> the EBDA.  The buffer is then copied out, and is exported to userland in
>> the file /sys/firmware/log.
>>
>
> OK, I really don't like this.
>
> All it has is a 32-bit nonrandom signature, no DMI keying or anything
> else to protect it.  This really isn't sufficient.

Good point. I'll add some DMI strings checks. It *should* be
sufficient to just ensure that "Google, Inc." is the board vendor
string (though I'll need to run some tests to verify that this covers
the boards we care about).
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