+ kasan-add-compiler-support-for-clang.patch added to -mm tree

+ kasan-add-compiler-support-for-clang.patch added to -mm tree

[akpm]

The patch titled
     Subject: kasan: add compiler support for clang
has been added to the -mm tree.  Its filename is
     kasan-add-compiler-support-for-clang.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/kasan-add-compiler-support-for-clang.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/kasan-add-compiler-support-for-clang.patch

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------------------------------------------------------
From: Paul Lawrence <paullawrence@google.com>
Subject: kasan: add compiler support for clang

Patch series "kasan: support alloca, LLVM", v4.


This patch (of 5):

For now we can hard-code ASAN ABI level 5, since historical clang builds
can't build the kernel anyway.  We also need to emulate gcc's
__SANITIZE_ADDRESS__ flag, or memset() calls won't be instrumented.

Link: http://lkml.kernel.org/r/20171204191735.132544-2-paullawrence@google.com
Signed-off-by: Greg Hackmann <ghackmann@google.com>
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/compiler-clang.h |    8 ++++++++
 1 file changed, 8 insertions(+)

diff -puN include/linux/compiler-clang.h~kasan-add-compiler-support-for-clang include/linux/compiler-clang.h
--- a/include/linux/compiler-clang.h~kasan-add-compiler-support-for-clang
+++ a/include/linux/compiler-clang.h
@@ -19,3 +19,11 @@
 
 #define randomized_struct_fields_start	struct {
 #define randomized_struct_fields_end	};
+
+/* all clang versions usable with the kernel support KASAN ABI version 5 */
+#define KASAN_ABI_VERSION 5
+
+/* emulate gcc's __SANITIZE_ADDRESS__ flag */
+#if __has_feature(address_sanitizer)
+#define __SANITIZE_ADDRESS__
+#endif
_

Patches currently in -mm which might be from paullawrence@google.com are

kasan-add-compiler-support-for-clang.patch
kasan-support-alloca-poisoning.patch
kasan-add-tests-for-alloca-poisoning.patch