[PATCH v6 00/18] khwasan: kernel hardware assisted address sanitizer

Andrey Konovalov andreyknvl at google.com
Thu Sep 6 04:06:23 PDT 2018


On Thu, Sep 6, 2018 at 12:05 PM, Will Deacon <will.deacon at arm.com> wrote:
> On Wed, Sep 05, 2018 at 02:10:32PM -0700, Andrew Morton wrote:
>> On Wed, 29 Aug 2018 13:35:04 +0200 Andrey Konovalov <andreyknvl at google.com> wrote:
>>
>> > This patchset adds a new mode to KASAN [1], which is called KHWASAN
>> > (Kernel HardWare assisted Address SANitizer).
>>
>> We're at v6 and there are no reviewed-by's or acked-by's to be seen.
>> Is that a fair commentary on what has been happening, or have people
>> been remiss in sending and gathering such things?
>
> I still have concerns about the consequences of merging this as anything
> other than a debug option [1]. Unfortunately, merging it as a debug option
> defeats the whole point, so I think we need to spend more effort on developing
> tools that can help us to find and fix the subtle bugs which will arise from
> enabling tagged pointers in the kernel.

I totally don't mind calling it a debug option. Do I need to somehow
specify it somewhere?

Why does it defeat the point? The point is to ease KASAN-like testing
on devices with limited memory.



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