| Subject | Re: [PATCH 4.9 09/62] kasan: turn on -fsanitize-address-use-after-scope | From | Andrey Ryabinin <> | Date | Mon, 6 May 2019 17:55:54 +0300 |
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On 5/6/19 5:32 PM, Greg Kroah-Hartman wrote: > From: Andrey Ryabinin <aryabinin@virtuozzo.com> > > commit c5caf21ab0cf884ef15b25af234f620e4a233139 upstream. > > 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 <aryabinin@virtuozzo.com> > Acked-by: Dmitry Vyukov <dvyukov@google.com> > Cc: Alexander Potapenko <glider@google.com> > Cc: Andrey Konovalov <andreyknvl@google.com> > Signed-off-by: Andrew Morton <akpm@linux-foundation.org> > Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> > Signed-off-by: Andrey Konovalov <andreyknvl@google.com> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > --- > scripts/Makefile.kasan | 2 ++ > 1 file changed, 2 insertions(+) > > --- a/scripts/Makefile.kasan > +++ b/scripts/Makefile.kasan > @@ -29,6 +29,8 @@ else > endif > endif > > +CFLAGS_KASAN += $(call cc-option, -fsanitize-address-use-after-scope) > + > CFLAGS_KASAN_NOSANITIZE := -fno-builtin > > endif > >
This shouldn't be in the -stable.
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