The patch titled
Subject: kasan: improve and simplify Kconfig.kasan
has been added to the -mm tree. Its filename is
kasan-improve-and-simplify-kconfigkasan.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-improve-and-simplify-kconfigkasan.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-improve-and-simplify-kconfigkasan.patch
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------------------------------------------------------
From: Marco Elver <elver@xxxxxxxxxx>
Subject: kasan: improve and simplify Kconfig.kasan
Turn 'KASAN' into a menuconfig, to avoid cluttering its parent menu with
the suboptions if enabled. Use 'if KASAN ... endif' instead of having to
'depend on KASAN' for each entry.
Link: http://lkml.kernel.org/r/20200629104157.3242503-1-elver@xxxxxxxxxx
Signed-off-by: Marco Elver <elver@xxxxxxxxxx>
Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Daniel Axtens <dja@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Cc: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/Kconfig.kasan | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
--- a/lib/Kconfig.kasan~kasan-improve-and-simplify-kconfigkasan
+++ a/lib/Kconfig.kasan
@@ -18,7 +18,7 @@ config CC_HAS_KASAN_SW_TAGS
config CC_HAS_WORKING_NOSANITIZE_ADDRESS
def_bool !CC_IS_GCC || GCC_VERSION >= 80300
-config KASAN
+menuconfig KASAN
bool "KASAN: runtime memory debugger"
depends on (HAVE_ARCH_KASAN && CC_HAS_KASAN_GENERIC) || \
(HAVE_ARCH_KASAN_SW_TAGS && CC_HAS_KASAN_SW_TAGS)
@@ -29,9 +29,10 @@ config KASAN
designed to find out-of-bounds accesses and use-after-free bugs.
See Documentation/dev-tools/kasan.rst for details.
+if KASAN
+
choice
prompt "KASAN mode"
- depends on KASAN
default KASAN_GENERIC
help
KASAN has two modes: generic KASAN (similar to userspace ASan,
@@ -88,7 +89,6 @@ endchoice
choice
prompt "Instrumentation type"
- depends on KASAN
default KASAN_OUTLINE
config KASAN_OUTLINE
@@ -113,7 +113,6 @@ endchoice
config KASAN_STACK_ENABLE
bool "Enable stack instrumentation (unsafe)" if CC_IS_CLANG && !COMPILE_TEST
- depends on KASAN
help
The LLVM stack address sanitizer has a know problem that
causes excessive stack usage in a lot of functions, see
@@ -134,7 +133,7 @@ config KASAN_STACK
config KASAN_S390_4_LEVEL_PAGING
bool "KASan: use 4-level paging"
- depends on KASAN && S390
+ depends on S390
help
Compiling the kernel with KASan disables automatic 3-level vs
4-level paging selection. 3-level paging is used by default (up
@@ -151,7 +150,7 @@ config KASAN_SW_TAGS_IDENTIFY
config KASAN_VMALLOC
bool "Back mappings in vmalloc space with real shadow memory"
- depends on KASAN && HAVE_ARCH_KASAN_VMALLOC
+ depends on HAVE_ARCH_KASAN_VMALLOC
help
By default, the shadow region for vmalloc space is the read-only
zero page. This means that KASAN cannot detect errors involving
@@ -164,8 +163,10 @@ config KASAN_VMALLOC
config TEST_KASAN
tristate "Module for testing KASAN for bug detection"
- depends on m && KASAN
+ depends on m
help
This is a test module doing various nasty things like
out of bounds accesses, use after free. It is useful for testing
kernel debugging features like KASAN.
+
+endif # KASAN
_
Patches currently in -mm which might be from elver@xxxxxxxxxx are
mm-kcsan-instrument-slab-slub-free-with-assert_exclusive_access.patch
kasan-improve-and-simplify-kconfigkasan.patch
kasan-update-required-compiler-versions-in-documentation.patch
kcov-unconditionally-add-fno-stack-protector-to-compiler-options.patch
