From: tip-bot for Kees Cook <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, keescook@chromium.org,
will.deacon@arm.com, torvalds@linux-foundation.org,
labbott@redhat.com, akpm@linux-foundation.org,
mark.rutland@arm.com, hpa@zytor.com, mingo@kernel.org,
tglx@linutronix.de, peterz@infradead.org
Subject: [tip:core/debug] Kconfig: Make STRICT_DEVMEM default-y on x86 and arm64
Date: Tue, 12 Dec 2017 02:56:47 -0800 [thread overview]
Message-ID: <tip-0f7cda2b824bb2afe0d75716a8664117fa03f5e0@git.kernel.org> (raw)
In-Reply-To: <20171201201000.GA44539@beast>
Commit-ID: 0f7cda2b824bb2afe0d75716a8664117fa03f5e0
Gitweb: https://git.kernel.org/tip/0f7cda2b824bb2afe0d75716a8664117fa03f5e0
Author: Kees Cook <keescook@chromium.org>
AuthorDate: Fri, 1 Dec 2017 12:10:00 -0800
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 11 Dec 2017 18:41:26 +0100
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@chromium.org>
Acked-by: Laura Abbott <labbott@redhat.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: kernel-hardening@lists.openwall.com
Link: http://lkml.kernel.org/r/20171201201000.GA44539@beast
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
lib/Kconfig.debug | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 947d3e2..39b123d 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
next prev parent reply other threads:[~2017-12-12 11:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-01 20:10 [PATCH] Kconfig: Make STRICT_DEVMEM default-y on x86 and arm64 Kees Cook
2017-12-01 20:46 ` Laura Abbott
2017-12-04 15:56 ` Will Deacon
2017-12-04 18:19 ` Kees Cook
2017-12-12 10:56 ` tip-bot for Kees Cook [this message]
2017-12-19 13:33 ` [kernel-hardening] " Ard Biesheuvel
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