On 8/19/19 7:14 PM, Mark Rutland wrote:
> In several places we need to be able to operate on pointers which have
> gone via a roundtrip:
>
> virt -> {phys,page} -> virt
>
> With KASAN_SW_TAGS, we can't preserve the tag for SLUB objects, and the
> {phys,page} -> virt conversion will use KASAN_TAG_KERNEL.
>
> This patch adds tests to ensure that this works as expected, without
> false positives which have recently been spotted [1,2] in testing.
>
> [1]
> https://lore.kernel.org/linux-arm-kernel/20190819114420.2535-1-walter-zh...@mediatek.com/
> [2]
> https://lore.kernel.org/linux-arm-kernel/20190819132347.gb9...@lakrids.cambridge.arm.com/
>
> Signed-off-by: Mark Rutland <mark.rutl...@arm.com>
> Reviewed-by: Andrey Konovalov <andreyk...@google.com>
> Tested-by: Andrey Konovalov <andreyk...@google.com>
> Cc: Alexander Potapenko <gli...@google.com>
> Cc: Andrew Morton <a...@linux-foundation.org>
> Cc: Andrey Ryabinin <aryabi...@virtuozzo.com>
> Cc: Dmitry Vyukov <dvyu...@google.com>
> Cc: Will Deacon <will.dea...@arm.com>
> ---
Acked-by: Andrey Ryabinin <aryabi...@virtuozzo.com>
