Re: [PATCH 02/11] replace memory function

On Wed, Oct 11, 2017 at 04:22:18PM +0800, Abbott Liu wrote:

From: Andrey Ryabinin <redacted>

Functions like memset/memmove/memcpy do a lot of memory accesses.
If bad pointer passed to one of these function it is important
to catch this. Compiler's instrumentation cannot do this since
these functions are written in assembly.

KASan replaces memory functions with manually instrumented variants.
Original functions declared as weak symbols so strong definitions
in mm/kasan/kasan.c could replace them. Original functions have aliases
with '__' prefix in name, so we could call non-instrumented variant
if needed.

KASAN in the decompressor makes no sense, so I think you need to
mark the decompressor compilation as such in this patch so it,
as a whole, sees no change.

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