[PATCH] powerpc/prom_init: Check display props exist before enabling btext

[Michael Ellerman]

On Fri, 21 Aug 2020 20:34:07 +1000, Michael Ellerman wrote:
> It's possible to enable CONFIG_PPC_EARLY_DEBUG_BOOTX for a pseries
> kernel (maybe it shouldn't be), which is then booted with qemu/slof.
> 
> But if you do that the kernel crashes in draw_byte(), with a DAR
> pointing somewhere near INT_MAX.
> 
> Adding some debug to prom_init we see that we're not able to read the
> "address" property from OF, so we're just using whatever junk value
> was on the stack.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/prom_init: Check display props exist before enabling btext
      https://git.kernel.org/powerpc/c/6c71cfcc01685ef495ca7886471a76e73446424e

cheers