The patch titled
Subject: kasan: allow enabling stack tagging for tag-based mode
has been added to the -mm tree. Its filename is
kasan-allow-enabling-stack-tagging-for-tag-based-mode.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-allow-enabling-stack-tagging-for-tag-based-mode.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-allow-enabling-stack-tagging-for-tag-based-mode.patch
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: allow enabling stack tagging for tag-based mode
Use CONFIG_KASAN_STACK to enable stack tagging.
Note, that HWASAN short granules [1] are disabled. Supporting those will
require more kernel changes.
[1] https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html
Link: http://lkml.kernel.org/r/e7febb907b539c3730780df587ce0b38dc558c3d.1596199677.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Elena Petrova <lenaptr@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Cc: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/Makefile.kasan | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/scripts/Makefile.kasan~kasan-allow-enabling-stack-tagging-for-tag-based-mode
+++ a/scripts/Makefile.kasan
@@ -44,7 +44,8 @@ else
endif
CFLAGS_KASAN := -fsanitize=kernel-hwaddress \
- -mllvm -hwasan-instrument-stack=0 \
+ -mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \
+ -mllvm -hwasan-use-short-granules=0 \
$(instrumentation_flags)
endif # CONFIG_KASAN_SW_TAGS
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-dont-tag-stacks-allocated-with-pagealloc.patch
kasan-arm64-dont-instrument-functions-that-enable-kasan.patch
kasan-allow-enabling-stack-tagging-for-tag-based-mode.patch
kasan-adjust-kasan_stack_oob-for-tag-based-mode.patch
