Re: [PATCH v6 1/1] x86_64: fix KASan shadow region page tables

[Andrey Ryabinin]

On 06/19/2015 03:06 PM, Borislav Petkov wrote:
> On Fri, Jun 19, 2015 at 02:49:19PM +0300, Andrey Ryabinin wrote:
>> I guess that AMD cpus is more strict (unlike Intel) about violation
>> of reserved/unused bits in page table entries. Please, try with this
>> patch.
> 
> With that the guest boots.
> 

Great! Thanks.

> How do I check whether KASan actually works? I don't see any note in
> dmesg or some file named "*kasan*" in sysfs...
> 

kasan will print report in dmesg whant it will find anything.

To make sure that it works you could try to load testing module (CONFIG_TEST_KASAN).
This module has bugs that kasan should catch.
Also 'slub_debug=U' in bootcmdline will improve reports and out-of-bounds accesses detection.

> Thanks.
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
Please read the FAQ at  http://www.tux.org/lkml/