[PATCH] Test for riscv fixes

[Edward AD]

Hi Alexandre,

On Fri, 29 Sep 2023 10:25:59 +0200 Alexandre Ghiti <alexghiti at rivosinc.com> wrote:
> I'm still not convinced this will fix the kasan out-of-bounds
> accesses, the page can be valid but the read can happen at an offset
> not initialized and trigger such errors right? I still think there is
> something weird about the stack frame, as to me this should not happen
> (but admittedly I don't know much about that).
The added check can confirm that the physical page is invalid (whether it is a 
vmalloc allocated page or a slab allocated page), and exit the for loop when it is invalid.

Perhaps we can trust the test results of syzbot.

Thanks,
edward