Re: [PATCH 4/4] efi: Make efi virtual runtime map passing more robust

From: Dave Young
Date: Mon Jan 13 2014 - 08:18:11 EST


On Mon, Jan 13, 2014 at 11:27:34AM +0100, Borislav Petkov wrote:
> On Mon, Jan 13, 2014 at 01:40:39PM +0800, Dave Young wrote:
> > Adding a safeguard check for desc_size is better though currently it's
> > impossible for the desc_size > PAGE_SIZE?
>
> Huh, what?
>
> sizeof(efi_memory_desc_t) is only 40 bytes AFAICT.

I know this is nearly impossible, but is there possible for some corrupted
desc_size value or firmware bug? who knows...

Thanks
Dave
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