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Fri, 20 Dec 2019 10:51:46 -0800 (PST) Date: Fri, 20 Dec 2019 19:49:46 +0100 In-Reply-To: <20191220184955.223741-1-glider@google.com> Message-Id: <20191220184955.223741-34-glider@google.com> Mime-Version: 1.0 References: <20191220184955.223741-1-glider@google.com> X-Mailer: git-send-email 2.24.1.735.g03f4e72817-goog Subject: [PATCH RFC v4 33/42] kmsan: enable KMSAN builds From: glider@google.com To: Jens Axboe , Andy Lutomirski , Vegard Nossum , Dmitry Vyukov , Marco Elver , Andrey Konovalov , linux-mm@kvack.org Cc: glider@google.com, viro@zeniv.linux.org.uk, adilger.kernel@dilger.ca, akpm@linux-foundation.org, aryabinin@virtuozzo.com, ard.biesheuvel@linaro.org, arnd@arndb.de, hch@infradead.org, hch@lst.de, darrick.wong@oracle.com, davem@davemloft.net, dmitry.torokhov@gmail.com, ebiggers@google.com, edumazet@google.com, ericvh@gmail.com, gregkh@linuxfoundation.org, harry.wentland@amd.com, herbert@gondor.apana.org.au, iii@linux.ibm.com, mingo@elte.hu, jasowang@redhat.com, m.szyprowski@samsung.com, mark.rutland@arm.com, martin.petersen@oracle.com, schwidefsky@de.ibm.com, willy@infradead.org, mst@redhat.com, mhocko@suse.com, monstr@monstr.eu, pmladek@suse.com, cai@lca.pw, rdunlap@infradead.org, robin.murphy@arm.com, sergey.senozhatsky@gmail.com, rostedt@goodmis.org, tiwai@suse.com, tytso@mit.edu, tglx@linutronix.de, gor@linux.ibm.com, wsa@the-dreams.de Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Make KMSAN usable by adding the necessary Makefile bits. Signed-off-by: Alexander Potapenko To: Alexander Potapenko Cc: Jens Axboe Cc: Andy Lutomirski Cc: Vegard Nossum Cc: Dmitry Vyukov Cc: Marco Elver Cc: Andrey Konovalov Cc: linux-mm@kvack.org --- This patch was previously called "kmsan: Changing existing files to enable KMSAN builds". Logically unrelated parts of it were split away. v4: - split away changes to init/main.c as requested by Andrey Konovalov Change-Id: I37e0b7f2d2f2b0aeac5753ff9d6b411485fc374e --- Makefile | 3 ++- mm/Makefile | 1 + scripts/Makefile.lib | 6 ++++++ 3 files changed, 9 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 73e3c2802927..cd77b3ee6238 100644 --- a/Makefile +++ b/Makefile @@ -478,7 +478,7 @@ export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS KBUILD_LDFLAGS export KBUILD_CFLAGS CFLAGS_KERNEL CFLAGS_MODULE -export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN +export CFLAGS_KASAN CFLAGS_KASAN_NOSANITIZE CFLAGS_UBSAN CFLAGS_KMSAN export KBUILD_AFLAGS AFLAGS_KERNEL AFLAGS_MODULE export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL @@ -897,6 +897,7 @@ KBUILD_CFLAGS += $(call cc-option,-fcf-protection=none) endif include scripts/Makefile.kasan +include scripts/Makefile.kmsan include scripts/Makefile.extrawarn include scripts/Makefile.ubsan diff --git a/mm/Makefile b/mm/Makefile index 1937cc251883..31c7ed675497 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -71,6 +71,7 @@ obj-$(CONFIG_PAGE_POISONING) += page_poison.o obj-$(CONFIG_SLAB) += slab.o obj-$(CONFIG_SLUB) += slub.o obj-$(CONFIG_KASAN) += kasan/ +obj-$(CONFIG_KMSAN) += kmsan/ obj-$(CONFIG_FAILSLAB) += failslab.o obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o obj-$(CONFIG_MEMTEST) += memtest.o diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 3fa32f83b2d7..ca9d2d0ef3fb 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -126,6 +126,12 @@ _c_flags += $(if $(patsubst n%,, \ $(CFLAGS_KASAN), $(CFLAGS_KASAN_NOSANITIZE)) endif +ifeq ($(CONFIG_KMSAN),y) +_c_flags += $(if $(patsubst n%,, \ + $(KMSAN_SANITIZE_$(basetarget).o)$(KMSAN_SANITIZE)y), \ + $(CFLAGS_KMSAN)) +endif + ifeq ($(CONFIG_UBSAN),y) _c_flags += $(if $(patsubst n%,, \ $(UBSAN_SANITIZE_$(basetarget).o)$(UBSAN_SANITIZE)$(CONFIG_UBSAN_SANITIZE_ALL)), \ -- 2.24.1.735.g03f4e72817-goog