Messages in this thread | | | Date | Tue, 11 Nov 2008 17:18:09 +0100 | From | Pavel Machek <> | Subject | Re: security: delete BIOS password in keyboard buffer during kernel bootup |
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On Sun 2008-11-09 11:08:14, Alan Cox wrote: > On Sun, 9 Nov 2008 09:41:20 +0100 > Mathias Schnarrenberger <mathias.schnarrenberger@gmx.de> wrote: > > > > What if my BIOS stores some critical info at that memory address? > > > I don't think the kernel is the right place to work around this issue. > > > > AFAIK every IBM PC compatible BIOS stores the keyboard buffer in this area. > > Not every system we boot the x86 kernel on is a PC compatible.
OTOH we don't call BIOS from linux, so we assume that low 64K is usable memory (unless marked otherwise in memmap, I guess).
Anyway, proper place to do clearing is bootloader; it interacts with bios already, anyway...
-- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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