From 7f66cd3f5420e7d11abd234033e7cb7a9738fc38 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Tue, 26 Jan 2016 01:18:13 +0100 Subject: ARM: 8500/1: fix atags_to_fdt with stack-protector-strong Building with CONFIG_CC_STACKPROTECTOR_STRONG triggers protection code generation under CONFIG_ARM_ATAG_DTB_COMPAT but this is too early for being able to use any of the stack_chk code. Explicitly disable it for only the atags_to_fdt bits. Suggested-by: zhxihu Signed-off-by: Kees Cook Acked-by: Arnd Bergmann Signed-off-by: Russell King --- arch/arm/boot/compressed/Makefile | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/arm/boot/compressed/Makefile b/arch/arm/boot/compressed/Makefile index 4c23a68a0917..7a6a58ef8aaf 100644 --- a/arch/arm/boot/compressed/Makefile +++ b/arch/arm/boot/compressed/Makefile @@ -106,6 +106,15 @@ ORIG_CFLAGS := $(KBUILD_CFLAGS) KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS)) endif +# -fstack-protector-strong triggers protection checks in this code, +# but it is being used too early to link to meaningful stack_chk logic. +nossp_flags := $(call cc-option, -fno-stack-protector) +CFLAGS_atags_to_fdt.o := $(nossp_flags) +CFLAGS_fdt.o := $(nossp_flags) +CFLAGS_fdt_ro.o := $(nossp_flags) +CFLAGS_fdt_rw.o := $(nossp_flags) +CFLAGS_fdt_wip.o := $(nossp_flags) + ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj) asflags-y := -DZIMAGE -- cgit v1.2.3-59-g8ed1b From 03590cb56d5df7367ccb9e6e0127593254401c42 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 27 Jan 2016 18:14:13 +0000 Subject: ARM: wire up copy_file_range() syscall Add the copy_file_range() syscall to ARM. Signed-off-by: Russell King --- arch/arm/include/uapi/asm/unistd.h | 1 + arch/arm/kernel/calls.S | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/arm/include/uapi/asm/unistd.h b/arch/arm/include/uapi/asm/unistd.h index ede692ffa32e..5dd2528e9e45 100644 --- a/arch/arm/include/uapi/asm/unistd.h +++ b/arch/arm/include/uapi/asm/unistd.h @@ -417,6 +417,7 @@ #define __NR_userfaultfd (__NR_SYSCALL_BASE+388) #define __NR_membarrier (__NR_SYSCALL_BASE+389) #define __NR_mlock2 (__NR_SYSCALL_BASE+390) +#define __NR_copy_file_range (__NR_SYSCALL_BASE+391) /* * The following SWIs are ARM private. diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S index ac368bb068d1..dfc7cd6851ad 100644 --- a/arch/arm/kernel/calls.S +++ b/arch/arm/kernel/calls.S @@ -400,6 +400,7 @@ CALL(sys_userfaultfd) CALL(sys_membarrier) CALL(sys_mlock2) + CALL(sys_copy_file_range) #ifndef syscalls_counted .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls #define syscalls_counted -- cgit v1.2.3-59-g8ed1b