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authorPaul Lawrence <paullawrence@google.com>2018-02-07 02:36:03 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-07 05:32:42 +0300
commit53a98ed73b848432a51631346b02049bb7fa039d (patch)
treef923b316690f5fd0064f5e6a968acf82c33b1420
parent0e410e158e5baa1300bdf678cea4f4e0cf9d8b94 (diff)
downloadlinux-53a98ed73b848432a51631346b02049bb7fa039d.tar.xz
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> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--include/linux/compiler-clang.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
index 3b609edffa8f..d02a4df3f473 100644
--- a/include/linux/compiler-clang.h
+++ b/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