Re: KASLR kernel fails to boot

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

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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