[next] arm: boot failed - PC is at cpu_ca15_set_pte_ext

[Naresh Kamboju]

Hi Max,

On Wed, 20 Apr 2022 at 13:20, Max Krummenacher <max.oss.09 at gmail.com> wrote:
>
> Am Mittwoch, den 20.04.2022, 09:31 +0200 schrieb Ard Biesheuvel:
> > On Tue, 19 Apr 2022 at 12:59, Naresh Kamboju <naresh.kamboju at linaro.org> wrote:
> > > Linux next 20220419 boot failed on arm architecture qemu_arm and BeagleBoard
> > > x15 device.
> > >
> > > kernel crash log from x15:
> > > -----------------
> > > [    6.866516] 8<--- cut here ---
> > > [    6.869598] Unable to handle kernel paging request at virtual
> > > address f000e62c

<trim>

> > Unfortunately, the vmlinux.xz file I downloaded from the link below
> > seems to be different from the one that produced the crash, given that
> > the LR address of c04cfeb8 does not seem to correspond with
> > handle_mm_fault+0x60c/0xed0.
> >
> > Can you please double check the artifacts?
>
> Commit "mm: check against orig_pte for finish_fault()" introduced this,
> i.e. on yesterdays next reverting a066bab3c0eb made a i.MX6 boot again.

Thanks for the pointers,
I have reverted the suggested commit and boot pass now.

Revert "mm: check against orig_pte for finish_fault()"
       This reverts commit a066bab3c0eb8f6155257f1345f07d1f6550bc4a.

> A fix is discussed here:
> https://lore.kernel.org/all/YliNP7ADcdc4Puvs@xz-m1.local/
>
> Max

- Naresh