The patch titled
Subject: powerpc: enable UBSAN support
has been added to the -mm tree. Its filename is
powerpc-enable-ubsan-support.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/powerpc-enable-ubsan-support.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/powerpc-enable-ubsan-support.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Daniel Axtens <dja@xxxxxxxxxx>
Subject: powerpc: enable UBSAN support
This hooks up UBSAN support for PowerPC.
So far it's found some interesting cases where we don't properly sanitise
input to shifts, including one in our futex handling. Nothing critical,
but interesting and worth fixing.
Signed-off-by: Daniel Axtens <dja@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/kernel/Makefile | 8 +++++++-
arch/powerpc/kernel/vdso32/Makefile | 1 +
arch/powerpc/kernel/vdso64/Makefile | 1 +
arch/powerpc/xmon/Makefile | 1 +
5 files changed, 11 insertions(+), 1 deletion(-)
diff -puN arch/powerpc/Kconfig~powerpc-enable-ubsan-support arch/powerpc/Kconfig
--- a/arch/powerpc/Kconfig~powerpc-enable-ubsan-support
+++ a/arch/powerpc/Kconfig
@@ -158,6 +158,7 @@ config PPC
select EDAC_ATOMIC_SCRUB
select ARCH_HAS_DMA_SET_COHERENT_MASK
select HAVE_ARCH_SECCOMP_FILTER
+ select ARCH_HAS_UBSAN_SANTIZE_ALL
config GENERIC_CSUM
def_bool CPU_LITTLE_ENDIAN
diff -puN arch/powerpc/kernel/Makefile~powerpc-enable-ubsan-support arch/powerpc/kernel/Makefile
--- a/arch/powerpc/kernel/Makefile~powerpc-enable-ubsan-support
+++ a/arch/powerpc/kernel/Makefile
@@ -136,12 +136,18 @@ endif
obj-$(CONFIG_EPAPR_PARAVIRT) += epapr_paravirt.o epapr_hcalls.o
obj-$(CONFIG_KVM_GUEST) += kvm.o kvm_emul.o
-# Disable GCOV in odd or sensitive code
+# Disable GCOV & sanitizers in odd or sensitive code
GCOV_PROFILE_prom_init.o := n
+UBSAN_SANITIZE_prom_init.o := n
GCOV_PROFILE_ftrace.o := n
+UBSAN_SANITIZE_ftrace.o := n
GCOV_PROFILE_machine_kexec_64.o := n
+UBSAN_SANITIZE_machine_kexec_64.o := n
GCOV_PROFILE_machine_kexec_32.o := n
+UBSAN_SANITIZE_machine_kexec_32.o := n
GCOV_PROFILE_kprobes.o := n
+UBSAN_SANITIZE_kprobes.o := n
+UBSAN_SANITIZE_vdso.o := n
extra-$(CONFIG_PPC_FPU) += fpu.o
extra-$(CONFIG_ALTIVEC) += vector.o
diff -puN arch/powerpc/kernel/vdso32/Makefile~powerpc-enable-ubsan-support arch/powerpc/kernel/vdso32/Makefile
--- a/arch/powerpc/kernel/vdso32/Makefile~powerpc-enable-ubsan-support
+++ a/arch/powerpc/kernel/vdso32/Makefile
@@ -15,6 +15,7 @@ targets := $(obj-vdso32) vdso32.so vdso3
obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
GCOV_PROFILE := n
+UBSAN_SANITIZE := n
ccflags-y := -shared -fno-common -fno-builtin
ccflags-y += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
diff -puN arch/powerpc/kernel/vdso64/Makefile~powerpc-enable-ubsan-support arch/powerpc/kernel/vdso64/Makefile
--- a/arch/powerpc/kernel/vdso64/Makefile~powerpc-enable-ubsan-support
+++ a/arch/powerpc/kernel/vdso64/Makefile
@@ -8,6 +8,7 @@ targets := $(obj-vdso64) vdso64.so vdso6
obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
GCOV_PROFILE := n
+UBSAN_SANITIZE := n
ccflags-y := -shared -fno-common -fno-builtin
ccflags-y += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
diff -puN arch/powerpc/xmon/Makefile~powerpc-enable-ubsan-support arch/powerpc/xmon/Makefile
--- a/arch/powerpc/xmon/Makefile~powerpc-enable-ubsan-support
+++ a/arch/powerpc/xmon/Makefile
@@ -3,6 +3,7 @@
subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
GCOV_PROFILE := n
+UBSAN_SANITIZE := n
ccflags-$(CONFIG_PPC64) := $(NO_MINIMAL_TOC)
_
Patches currently in -mm which might be from dja@xxxxxxxxxx are
powerpc-enable-ubsan-support.patch
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