[PATCH v8 10/11] arm64/kasan: explicitly zero kasan shadow memory
mark.rutland at arm.com
Fri Sep 15 14:51:48 PDT 2017
On Fri, Sep 15, 2017 at 05:20:59PM -0400, Pavel Tatashin wrote:
> Hi Mark,
> I had this option back upto version 3, where zero flag was passed into
> vmemmap_alloc_block(), but I was asked to remove it, because it required too
> many changes in other places.
Ok. Sorry for bringing back a point that had already been covered.
> So, the current approach is cleaner, but the idea is that kasan should use
> its own version of vmemmap_populate() for both x86 and ARM, but I think it is
> outside of the scope of this work.
I appreciate that this is unrelated to your ultimate goal, and that this is
somewhat frustrating given the KASAN code is arguably abusing the
However, I do think we need to migrate the KASAN code to a proper interface
immediately, rather than making it worse in the interim.
> If you think I should add these function in this project, than sure I can
> send a new version with kasanmap_populate() functions.
I would very much appreciate if you could send a version with a
kasan_map_populate() interface. I'm more than happy to review/test that portion
of the series, or to help if there's some problem which makes that difficult.
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