Re: [PATCH 24/31] kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged

[Andrey Konovalov]

On Fri, Dec 3, 2021 at 1:42 PM Marco Elver <elver@xxxxxxxxxx> wrote:
>
> On Tue, Nov 30, 2021 at 11:07PM +0100, andrey.konovalov@xxxxxxxxx wrote:
> > From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
> >
> > HW_TAGS KASAN relies on ARM Memory Tagging Extension (MTE). With MTE,
> > a memory region must be mapped as MT_NORMAL_TAGGED to allow setting
> > memory tags via MTE-specific instructions.
> >
> > This change adds proper protection bits to vmalloc() allocations.
> > These allocations are always backed by page_alloc pages, so the tags
> > will actually be getting set on the corresponding physical memory.
> >
> > Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
> > Co-developed-by: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
>
> This is also missing Signed-off-by from Vincenzo.

Same here. Thanks!