[PATCH v16 09/16] fs, arm64: untag user pointers in fs/userfaultfd.c
catalin.marinas at arm.com
Wed Jun 12 10:45:17 UTC 2019
On Mon, Jun 03, 2019 at 06:55:11PM +0200, Andrey Konovalov wrote:
> This patch is a part of a series that extends arm64 kernel ABI to allow to
> pass tagged user pointers (with the top byte set to something else other
> than 0x00) as syscall arguments.
> userfaultfd code use provided user pointers for vma lookups, which can
> only by done with untagged pointers.
> Untag user pointers in validate_range().
> Signed-off-by: Andrey Konovalov <andreyknvl at google.com>
Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>
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