From: Kuan-Ying Lee <kylee0686026@gmail.com>
To: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Kuan-Ying Lee <kylee0686026@gmail.com>,
Marco Elver <elver@google.com>
Subject: [PATCH v2 3/3] kasan: add memory corruption identification support for hardware tag-based mode
Date: Sat, 12 Jun 2021 12:51:56 +0800 [thread overview]
Message-ID: <20210612045156.44763-4-kylee0686026@gmail.com> (raw)
In-Reply-To: <20210612045156.44763-1-kylee0686026@gmail.com>
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 <kylee0686026@gmail.com>
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
--
2.25.1
prev parent reply other threads:[~2021-06-12 4:55 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-12 4:51 [PATCH v2 0/3] kasan: add memory corruption identification for hw tag-based kasan Kuan-Ying Lee
2021-06-12 4:51 ` [PATCH v2 1/3] kasan: rename CONFIG_KASAN_SW_TAGS_IDENTIFY to CONFIG_KASAN_TAGS_IDENTIFY Kuan-Ying Lee
2021-06-12 4:51 ` [PATCH v2 2/3] kasan: integrate the common part of two KASAN tag-based modes Kuan-Ying Lee
2021-06-12 14:42 ` Marco Elver
2021-06-12 15:51 ` Kuan-Ying Lee
2021-06-14 8:48 ` Marco Elver
2021-06-19 6:39 ` Kuan-Ying Lee
2021-06-12 15:52 ` Greg Kroah-Hartman
2021-06-12 4:51 ` Kuan-Ying Lee [this message]
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