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Andrey Konovalov 01d92c7f35 kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged
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.

Add 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.

Link: https://lkml.kernel.org/r/983fc33542db2f6b1e77b34ca23448d4640bbb9e.1643047180.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Co-developed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Marco Elver <elver@google.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Evgenii Stepanov <eugenis@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Collingbourne <pcc@google.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-03-24 19:06:47 -07:00
arch kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged 2022-03-24 19:06:47 -07:00
block
certs
crypto
Documentation tools/vm/page_owner_sort.c: support for user-defined culling rules 2022-03-24 19:06:45 -07:00
drivers
fs
include kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged 2022-03-24 19:06:47 -07:00
init
ipc
kernel kasan, arm64: reset pointer tags of vmapped stacks 2022-03-24 19:06:47 -07:00
lib
LICENSES
mm kasan, vmalloc, arm64: mark vmalloc mappings as pgprot_tagged 2022-03-24 19:06:47 -07:00
net
samples
scripts
security
sound
tools selftest/vm: add helpers to detect PAGE_SIZE and PAGE_SHIFT 2022-03-24 19:06:45 -07:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.