Re: KASLR kernel fails to boot

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

After the latest updates to /usr/mdec/prekern, now I am getting
------------
FATAL
elf sym lookup: symbol beyond table
------------

when I try to load the KASLR kernel.

Chavdar

On Tue, 5 May 2020 at 21:26, Chavdar Ivanov <ci4ic4%gmail.com@localhost> wrote:
>
> Ok, thanks.
>
> On Tue, 5 May 2020 at 20:21, Maxime Villard <max%m00nbsd.net@localhost> wrote:
> >
> > Le 05/05/2020 à 21:01, Chavdar Ivanov a écrit :
> > > On Mon, 4 May 2020 at 21:21, Chavdar Ivanov <ci4ic4%gmail.com@localhost> wrote:
> > >>
> > >> Hi,
> > >>
> > >> netbsd-GENERIC_KASLR from yesterday fails to pass the prekern stage
> > >> with a frightening message in red 'Page fault'. I've never seen this
> > >> before, no idea if I can get any further info.
> > >>
> > >> This machine has been otherwise running KASLR kernel for some four
> > >> months now without a problem; it is a VirtualBox guest.
> > >
> > > Same with just completed clean buid of 9.99.60.
> > >
> > > After "[+] Rel relocations applied" I get:
> > >
> > > ****** Fault occurred ******
> > > page fault
> > > ******************************
> > >
> > > I switched th vm to the normal kernel, no problem otherwise.
> >
> > I know, this is because of the Xen section in the binary, which is not
> > marked as allocatable. The prekern explicitly decides not to map the note
> > but then proceeds to relocate its RELAs regardless, which causes a fatal
> > page fault.
> >
> > Trivial to fix but I'm not sure which policy to choose, may take a few
> > days.
>
>
>
> --
> ----



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