[PATCH v3] powerpc/kasan: Fix shadow memory protection with CONFIG_KASAN_VMALLOC

[Michael Ellerman]

On Fri, 2020-03-06 at 16:49:49 UTC, Christophe Leroy wrote:
> With CONFIG_KASAN_VMALLOC, new page tables are created at the time
> shadow memory for vmalloc area in unmapped. If some parts of the
> page table still has entries to the zero page shadow memory, the
> entries are wrongly marked RW.
> 
> With CONFIG_KASAN_VMALLOC, almost the entire kernel address space
> is managed by KASAN. To make it simple, just create KASAN page tables
> for the entire kernel space at kasan_init(). That doesn't use much
> more space, and that's anyway already done for hash platforms.
> 
> Fixes: 3d4247fcc938 ("powerpc/32: Add support of KASAN_VMALLOC")
> Signed-off-by: Christophe Leroy <christophe.leroy at c-s.fr>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/af3d0a68698c7e5df8b72267086b23422a3954bb

cheers