Re: [RFC PATCH 0/3] basic KASAN support for Xen PV domains

[Sergey Dyasli]

On 17/12/2019 18:06, Boris Ostrovsky wrote:
> 
> 
>> On Dec 17, 2019, at 9:08 AM, Sergey Dyasli <sergey.dyasli@xxxxxxxxxx> wrote:
>>
>> This series allows to boot and run Xen PV kernels (Dom0 and DomU) with
>> CONFIG_KASAN=y. It has been used internally for some time now with good
>> results for finding memory corruption issues in Dom0 kernel.
>>
>> Only Outline instrumentation is supported at the moment.
>>
>> Patch 1 is of RFC quality
>> Patches 2-3 are independent and quite self-contained.
> 
> 
> Donât you need to initialize kasan before, for example, calling kasan_alloc_pages() in patch 2?

Patch 1 is enough to correctly initialise PV Kasan. But without patch 2, lots
of false positive out-of-bounds accesses are reported once a guest starts using
PV I/O devices.

--
Thanks,
Sergey