KASAN debug kernel fails to boot at early stage when CONFIG_SMP=y is set (kernel 6.5-rc5, PowerMac G4 3,6)

[Christophe Leroy]

Le 11/08/2023 à 01:48, Erhard Furtner a écrit :
> I wanted to fire up my PowerMac G4 MDD (Dual CPU) with a KASAN debug build of kernel 6.5-rc5 for testing purposes. But the kernel fails to boot at a very early stage. I only get a white screen reading
> "done
> found display: /pci at f0000000/ATY,AlteracParent at 10/ATY,Alterac_B at 1, opening..."

Can you try with CONFIG_PPC_EARLY_DEBUG and see if you get more 
information on the screen ?

Christophe


> 
> When I use the same kernel .config but disable SMP the machine just boots up fine with the KASAN enabled kernel.
> 
> Perhaps a similar issue to https://bugzilla.kernel.org/show_bug.cgi?id=216190 ?
> 
> Kernel .config and full dmesg attached.
> 
> Regards,
> Erhard F.