On Thu, Dec 8, 2016 at 1:48 PM, Andrey Ryabinin <aryabi...@virtuozzo.com> wrote: > In the upcoming gcc7 release 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. > > Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> > --- > scripts/Makefile.kasan | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/scripts/Makefile.kasan b/scripts/Makefile.kasan > index 37323b0..9576775 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 > --
Doubled word "release release" on the first line of description. But otherwise: Acked-by: Dmitry Vyukov <dvyu...@google.com> I've just submitted the corresponding gcc change: https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=243441