Re: [PATCH v4 1/1] x86_64: fix KASan shadow region page tables

[Alexander Popov <alpopov@ptsecurity.com>]

On 03.06.2015 10:44, Ingo Molnar wrote:
> 
> * Alexander Popov <alpopov@ptsecurity.com> wrote:
>> +	kasan_early_init();
>> +	kasan_map_early_shadow(early_level4_pgt);
> 
> So why isn't kasan_map_early_shadow() called in kasan_early_init()?
> 
> High level x86 init code should not be polluted with too many low level details.

Hello, Ingo.

kasan_map_early_shadow() is called twice in x86_64_start_kernel():
once for early_level4_pgt and then later for init_level4_pgt.

I've decided to introduce separate kasan_early_init() to avoid big changes
which can bring consequences that I don't understand.

Best regards,
Alexander