Re: [PATCH v2] kasan: Support for r/w instrumentation control

[Andrey Ryabinin]

On 12/13/2016 11:58 AM, Dmitry Vyukov wrote:

> --- a/Documentation/dev-tools/kasan.rst
> +++ b/Documentation/dev-tools/kasan.rst
> @@ -40,6 +40,14 @@ similar to the following to the respective kernel Makefile:
> 
>      KASAN_SANITIZE := n
> 
> +Sometimes it may be useful to disable instrumentation of reads, or writes
> +or both for the entire kernel. For example, if binary size is a concern,
> +it may be useful to disable instrumentation of reads to reduce binary size but
> +still catch more harmful bugs on writes. Or, if one is interested only in
> +sanitization of a particular module and performance is a concern, she can
> +disable instrumentation of both reads and writes for kernel code.
> +Instrumentation can be disabled with CONFIG_KASAN_READS and
> CONFIG_KASAN_WRITES.
> +

I don't understand this. How this can be related to modules? Configs are global.
You can't just disable/enable config per module.

>  Error reports
>