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authorAndrey Konovalov <andreyknvl@google.com>2020-08-06 23:25:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 11:33:28 -0700
commitcae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 (patch)
tree73cf5312de6615304cf5393ed090812e81efefee /scripts
parentf9409d58e972cada2c524b7f1e54631bb8fa176f (diff)
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 Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Elena Petrova <lenaptr@google.com> Cc: Marco Elver <elver@google.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Walter Wu <walter-zh.wu@mediatek.com> Cc: Ard Biesheuvel <ardb@kernel.org> Link: http://lkml.kernel.org/r/e7febb907b539c3730780df587ce0b38dc558c3d.1596199677.git.andreyknvl@google.com Link: http://lkml.kernel.org/r/99f7d90a4237431bf5988599fb41358e92876eb0.1596544734.git.andreyknvl@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.kasan3
1 files changed, 2 insertions, 1 deletions
diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan
index 03757cc60e06..f4beee1b0013 100644
--- a/scripts/Makefile.kasan
+++ b/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