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Date: Fri, 1 Dec 2017 12:10:00 -0800
From: Kees Cook <keescook@...omium.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, kernel-hardening@...ts.openwall.com,
Mark Rutland <mark.rutland@....com>,
Will Deacon <will.deacon@....com>,
Laura Abbott <labbott@...hat.com>, x86@...nel.org
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 <keescook@...omium.org>
---
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
--
2.7.4
--
Kees Cook
Pixel Security
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