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@f0000000/ATY,AlteracParent@10/ATY,Alterac_B@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.