[PATCH v4 4/4] arm64: vdso32: enable orphan handling for VDSO

[Vincenzo Frascino]

On 4/14/22 11:46 AM, Joey Gouly wrote:
> Like vmlinux, enable orphan-handling for the compat VDSO32. This can catch
> subtle errors that might arise from unexpected sections being included.
> 
> Signed-off-by: Joey Gouly <joey.gouly at arm.com>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Cc: Masahiro Yamada <masahiroy at kernel.org>
> Cc: Vincenzo Frascino <vincenzo.frascino at arm.com>
> Cc: Kees Cook <keescook at chromium.org>

Reviewed-by: Vincenzo Frascino <vincenzo.frascino at arm.com>

> ---
>  arch/arm64/kernel/vdso32/Makefile | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
> index ed181bedbffc..1bf0bfb99652 100644
> --- a/arch/arm64/kernel/vdso32/Makefile
> +++ b/arch/arm64/kernel/vdso32/Makefile
> @@ -104,6 +104,7 @@ VDSO_AFLAGS += -D__ASSEMBLY__
>  VDSO_LDFLAGS += -Bsymbolic --no-undefined -soname=linux-vdso.so.1
>  VDSO_LDFLAGS += -z max-page-size=4096 -z common-page-size=4096
>  VDSO_LDFLAGS += -shared --hash-style=sysv --build-id=sha1
> +VDSO_LDFLAGS += --orphan-handling=warn
>  
>  
>  # Borrow vdsomunge.c from the arm vDSO

-- 
Regards,
Vincenzo