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Andrey Konovalov 8712cc728d BACKPORT: kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS 
The conflict during backport is caused by the
include/linux/compiler_attributes.h file not being present.

(Upstream commit 2bd926b439).

This commit splits the current CONFIG_KASAN config option into two:
1. CONFIG_KASAN_GENERIC, that enables the generic KASAN mode (the one
   that exists now);
2. CONFIG_KASAN_SW_TAGS, that enables the software tag-based KASAN mode.

The name CONFIG_KASAN_SW_TAGS is chosen as in the future we will have
another hardware tag-based KASAN mode, that will rely on hardware memory
tagging support in arm64.

With CONFIG_KASAN_SW_TAGS enabled, compiler options are changed to
instrument kernel files with -fsantize=kernel-hwaddress (except the ones
for which KASAN_SANITIZE := n is set).

Both CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS support both
CONFIG_KASAN_INLINE and CONFIG_KASAN_OUTLINE instrumentation modes.

This commit also adds empty placeholder (for now) implementation of
tag-based KASAN specific hooks inserted by the compiler and adjusts
common hooks implementation.

While this commit adds the CONFIG_KASAN_SW_TAGS config option, this option
is not selectable, as it depends on HAVE_ARCH_KASAN_SW_TAGS, which we will
enable once all the infrastracture code has been added.

Link: http://lkml.kernel.org/r/b2550106eb8a68b10fefbabce820910b115aa853.1544099024.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: Id95c0c0b6857c6b30f2bea4597aea6c90273ef89
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Bug: 128674696
2019-09-24 17:44:12 -07:00
arch UPSTREAM: arm64: add EXPORT_SYMBOL_NOKASAN() 2019-09-24 17:44:11 -07:00
block This is the 4.19.73 stable release 2019-09-16 09:35:02 +02:00
certs export.h: remove VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR() 2018-08-22 23:21:44 +09:00
crypto This is the 4.19.61 stable release 2019-07-26 10:31:53 +02:00
Documentation This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
drivers This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
firmware kbuild: remove all dummy assignments to obj- 2017-11-18 11:46:06 +09:00
fs This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
include BACKPORT: kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS 2019-09-24 17:44:12 -07:00
init ANDROID: net: enable wireless core features with GKI_LEGACY_WEXT_ALLCONFIG 2019-09-20 19:17:14 +00:00
ipc This is the 4.19.65 stable release 2019-08-06 20:08:18 +02:00
kernel This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
lib BACKPORT: kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS 2019-09-24 17:44:12 -07:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm BACKPORT: kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS 2019-09-24 17:44:12 -07:00
net This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
samples samples, bpf: suppress compiler warning 2019-07-14 08:11:04 +02:00
scripts BACKPORT: kasan: add CONFIG_KASAN_GENERIC and CONFIG_KASAN_SW_TAGS 2019-09-24 17:44:12 -07:00
security This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
sound UPSTREAM: ALSA: pcm: add support for 352.8KHz and 384KHz sample rate 2019-09-18 20:34:13 +00:00
tools This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
usr initramfs: move gen_initramfs_list.sh from scripts/ to usr/ 2018-08-22 23:21:44 +09:00
virt KVM: coalesced_mmio: add bounds checking 2019-09-21 07:16:44 +02:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore Kbuild updates for v4.17 (2nd) 2018-04-15 17:21:30 -07:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
abi_gki_aarch64.xml ANDROID: enable CONFIG_ION_SYSTEM_HEAP for GKI 2019-09-23 23:26:20 -07:00
build.config.gki.aarch64 Adding GKI Ramdisk to gki config 2019-08-14 18:17:18 +00:00
build.config.gki.x86_64 Adding GKI Ramdisk to gki config 2019-08-14 18:17:18 +00:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
MAINTAINERS platform/x86: Add Intel AtomISP2 dummy / power-management driver 2019-04-20 09:16:02 +02:00
Makefile This is the 4.19.75 stable release 2019-09-21 07:55:26 +02:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00

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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.