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Linux kernel for uConsole
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Andrey Ryabinin f46851e627 BACKPORT: kasan: remove use after scope bugs detection. 
(Upstream commit 7771bdbbfd).

Use after scope bugs detector seems to be almost entirely useless for
the linux kernel.  It exists over two years, but I've seen only one
valid bug so far [1].  And the bug was fixed before it has been
reported.  There were some other use-after-scope reports, but they were
false-positives due to different reasons like incompatibility with
structleak plugin.

This feature significantly increases stack usage, especially with GCC <
9 version, and causes a 32K stack overflow.  It probably adds
performance penalty too.

Given all that, let's remove use-after-scope detector entirely.

While preparing this patch I've noticed that we mistakenly enable
use-after-scope detection for clang compiler regardless of
CONFIG_KASAN_EXTRA setting.  This is also fixed now.

[1] http://lkml.kernel.org/r/<20171129052106.rhgbjhhis53hkgfn@wfg-t540p.sh.intel.com>

Link: http://lkml.kernel.org/r/20190111185842.13978-1-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Will Deacon <will.deacon@arm.com>		[arm64]
Cc: Qian Cai <cai@lca.pw>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Change-Id: I00d869a5e287e3e198950b78ad17bd6ff6a51595
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Bug: 128674696
2019-09-24 17:44:15 -07:00
arch BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -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 UPSTREAM: kasan: update documentation 2019-09-24 17:44:13 -07:00
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: mm/memblock.c: skip kmemleak for kasan_init() 2019-09-24 17:44:13 -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: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
LICENSES LICENSES: Remove CC-BY-SA-4.0 license text 2018-10-18 11:28:50 +02:00
mm BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -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: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
security BACKPORT: kasan: remove use after scope bugs detection. 2019-09-24 17:44:15 -07:00
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
.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.