From: Andrey Ryabinin Date: Tue, 13 Dec 2016 00:44:59 +0000 (-0800) Subject: kasan: turn on -fsanitize-address-use-after-scope X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=c5caf21ab0cf884ef15b25af234f620e4a233139;p=openwrt%2Fstaging%2Fblogic.git kasan: turn on -fsanitize-address-use-after-scope In the upcoming gcc7 release, the -fsanitize=kernel-address option at first implied new -fsanitize-address-use-after-scope option. This would cause link errors on older kernels because they don't have two new functions required for use-after-scope support. Therefore, gcc7 changed default to -fno-sanitize-address-use-after-scope. Now the kernel has everything required for that feature since commit 828347f8f9a5 ("kasan: support use-after-scope detection"). So, to make it work, we just have to enable use-after-scope in CFLAGS. Link: http://lkml.kernel.org/r/1481207977-28654-1-git-send-email-aryabinin@virtuozzo.com Signed-off-by: Andrey Ryabinin Acked-by: Dmitry Vyukov Cc: Alexander Potapenko Cc: Andrey Konovalov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan index 37323b0df374..9576775a86f6 100644 --- a/scripts/Makefile.kasan +++ b/scripts/Makefile.kasan @@ -28,4 +28,6 @@ else CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL) endif endif + +CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) endif