[PATCH v3 3/3] kasan: add memory corruption identification support for hardware tag-based mode
From: Kuan-Ying Lee <hidden>
Date: 2021-06-20 11:48:30
Also in:
linux-arm-kernel, linux-mm, lkml
Subsystem:
kasan, library code, memory management, the rest · Maintainers:
Andrey Ryabinin, Andrew Morton, Linus Torvalds
Add memory corruption identification support for hardware tag-based mode. We store one old free pointer tag and free backtrace. Signed-off-by: Kuan-Ying Lee <redacted> Suggested-by: Marco Elver <elver@google.com> Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Konovalov <andreyknvl@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Andrew Morton <akpm@linux-foundation.org> --- lib/Kconfig.kasan | 2 +- mm/kasan/kasan.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/lib/Kconfig.kasan b/lib/Kconfig.kasan
index 6f5d48832139..2cc25792bc2f 100644
--- a/lib/Kconfig.kasan
+++ b/lib/Kconfig.kasan@@ -157,7 +157,7 @@ config KASAN_STACK config KASAN_TAGS_IDENTIFY bool "Enable memory corruption identification" - depends on KASAN_SW_TAGS + depends on KASAN_SW_TAGS || KASAN_HW_TAGS help This option enables best-effort identification of bug type (use-after-free or out-of-bounds) at the cost of increased
diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h
index b0fc9a1eb7e3..d6f982b8a84e 100644
--- a/mm/kasan/kasan.h
+++ b/mm/kasan/kasan.h@@ -153,7 +153,7 @@ struct kasan_track { depot_stack_handle_t stack; }; -#ifdef CONFIG_KASAN_TAGS_IDENTIFY +#if defined(CONFIG_KASAN_TAGS_IDENTIFY) && defined(CONFIG_KASAN_SW_TAGS) #define KASAN_NR_FREE_STACKS 5 #else #define KASAN_NR_FREE_STACKS 1
--
2.18.0
_______________________________________________
Linux-mediatek mailing list
Linux-mediatek@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-mediatek