From 0f7cda2b824bb2afe0d75716a8664117fa03f5e0 Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Fri, 1 Dec 2017 12:10:00 -0800 Subject: [PATCH] Kconfig: Make STRICT_DEVMEM default-y on x86 and arm64 Distros have been shipping with CONFIG_STRICT_DEVMEM=y for years now. It is probably time to flip this default for x86 and arm64. Signed-off-by: Kees Cook Acked-by: Laura Abbott Cc: Andrew Morton Cc: Linus Torvalds Cc: Mark Rutland Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Cc: kernel-hardening@lists.openwall.com Link: http://lkml.kernel.org/r/20171201201000.GA44539@beast Signed-off-by: Ingo Molnar --- lib/Kconfig.debug | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 947d3e2ed5c2..39b123d04a36 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -1985,7 +1985,7 @@ config STRICT_DEVMEM bool "Filter access to /dev/mem" depends on MMU && DEVMEM depends on ARCH_HAS_DEVMEM_IS_ALLOWED - default y if TILE || PPC + default y if TILE || PPC || X86 || ARM64 ---help--- If this option is disabled, you allow userspace (root) access to all of memory, including kernel and userspace memory. Accidental -- 2.30.2