Arm + KASAN + syzbot

[Dmitry Vyukov]

On Wed, Jan 27, 2021 at 9:24 AM Linus Walleij <linus.walleij at linaro.org> wrote:
> > I've set up an arm32 instance (w/o KASAN for now), but kernel fails during boot:
> > https://groups.google.com/g/syzkaller-bugs/c/omh0Em-CPq0
> > So far arm32 testing does not progress beyond attempts to boot.
>
> It is booting all right it seems.

It depends on the definition of "all right". If you are looking for
bugs, and you have bugs during boot, then that's it  :)

> Today it looks like Hillf Danton found the problem:

Yes, it seems so.

> if I understand correctly
> the code is executing arm32-on-arm64 (virtualized QEMU for ARM32
> on ARM64?) and that was not working with the vexpress QEMU model
> because not properly tested.

It's qemu-system-arm running on x86_64.
But I don't think that bug is related, it seems to affect arm32 in general.



> I don't know if I understand the problem right though :/
>
> Yours,
> Linus Walleij