Hi Linus,

On 6/30/2020 6:37 AM, Linus Walleij wrote:
> This is the v11 version of the KASan patches for ARM.
> 
> The main changes from the v10 version is:
> 
> - LPAE now compiles and works again, at least Versatile Express
>   Cortex A15 TC1 in QEMU (which is the LPAE system I have
>   access to).
> 
> - Rewrite some of the page directory initialization after
>   helpful feedback from Mike Rapoport and Russell King.
> 
> Also minor improvements to commit messages and comments
> in the code so it is clear (for most cases I hope) why
> some ifdefs etc are there.
> 
> All tested platforms from ARMv4 thru ARMv7 work fine. I
> have not been able to re-test with the Qualcomm DragonBoard
> APQ8060 yet, but I suspect the problem there is that the
> DT parser code reaches out into non-kernel memory and
> needs some de-instrumentation, possibly combined with the
> memory holding the device tree getting corrupted or reused
> before we have a chance to parse it.

So one of my systems (BCM7278 chip), we do indeed reach the point where
unflatten_dt_nodes crashes the system and I guess this is a "pass" for now.

On another system though (BCM7445 chip) with a physical memory map that
looks like this:

0x0000_0000 - 0x3fff_ffff (MEMC0)
0x4000_0000 - 0x7fff_ffff (MEMC1)
0x8000_0000 - 0xbfff_ffff (MEMC2)

we get the attached boot error.
-- 
Florian