Re: [PATCH v17 02/26] x86/cet/shstk: Add Kconfig option for user-mode control-flow protection
From: Borislav Petkov <bp@alien8.de>
Date: 2021-01-19 11:28:56
Also in:
linux-arch, linux-doc, linux-mm, lkml
On Tue, Dec 29, 2020 at 01:30:29PM -0800, Yu-cheng Yu wrote:
quoted hunk ↗ jump to hunk
Shadow Stack provides protection against function return address corruption. It is active when the processor supports it, the kernel has CONFIG_X86_CET_USER enabled, and the application is built for the feature. This is only implemented for the 64-bit kernel. When it is enabled, legacy non-Shadow Stack applications continue to work, but without protection. Signed-off-by: Yu-cheng Yu <redacted> --- arch/x86/Kconfig | 22 ++++++++++++++++++++++ arch/x86/Kconfig.assembler | 5 +++++ 2 files changed, 27 insertions(+)diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7b6dd10b162a..72cff400b9ae 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig@@ -1950,6 +1950,28 @@ config X86_SGX If unsure, say N. +config ARCH_HAS_SHADOW_STACK + def_bool n + +config X86_CET_USER
That thing needs to be X86_CET. How many times do I need to type this
before you do it?
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette