2022-05-14 00:35:07

by Sami Tolvanen

Subject: [RFC PATCH v2 02/21] arm64/vdso: Filter out CC_FLAGS_CFI

Explicitly filter out CC_FLAGS_CFI in preparation for the flags being
removed from CC_FLAGS_LTO.

Signed-off-by: Sami Tolvanen <[email protected]>
---
arch/arm64/kernel/vdso/Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/vdso/Makefile b/arch/arm64/kernel/vdso/Makefile
index 172452f79e46..6c26e0a76a06 100644
--- a/arch/arm64/kernel/vdso/Makefile
+++ b/arch/arm64/kernel/vdso/Makefile
@@ -33,7 +33,8 @@ ccflags-y += -DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
# the CFLAGS of vgettimeofday.c to make possible to build the
# kernel with CONFIG_WERROR enabled.
CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS) \
- $(CC_FLAGS_LTO) -Wmissing-prototypes -Wmissing-declarations
+ $(CC_FLAGS_LTO) $(CC_FLAGS_CFI) \
+ -Wmissing-prototypes -Wmissing-declarations
KASAN_SANITIZE := n
KCSAN_SANITIZE := n
UBSAN_SANITIZE := n
--
2.36.0.550.gb090851708-goog

2022-05-16 12:48:46

by Kees Cook

Subject: Re: [RFC PATCH v2 02/21] arm64/vdso: Filter out CC_FLAGS_CFI

On Fri, May 13, 2022 at 01:21:40PM -0700, Sami Tolvanen wrote:
> Explicitly filter out CC_FLAGS_CFI in preparation for the flags being
> removed from CC_FLAGS_LTO.
>
> Signed-off-by: Sami Tolvanen <[email protected]>

Reviewed-by: Kees Cook <[email protected]>

--
Kees Cook