From: Catalin Marinas <catalin.marinas@arm.com>
To: Dan Williams <dan.j.williams@intel.com>
Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
Russell King <linux@arm.linux.org.uk>,
Kees Cook <keescook@chromium.org>, Arnd Bergmann <arnd@arndb.de>,
linux-nvdimm@lists.01.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Will Deacon <will.deacon@arm.com>,
"David S. Miller" <davem@davemloft.net>,
Ingo Molnar <mingo@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug
Date: Mon, 23 Nov 2015 10:19:45 +0000 [thread overview]
Message-ID: <20151123101944.GA32300@e104818-lin.cambridge.arm.com> (raw)
In-Reply-To: <20151122035702.9313.52457.stgit@dwillia2-desk3.jf.intel.com>
On Sat, Nov 21, 2015 at 07:57:02PM -0800, Dan Williams wrote:
> diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
> index 04fb73b973f1..e13c4bf84d9e 100644
> --- a/arch/arm64/Kconfig.debug
> +++ b/arch/arm64/Kconfig.debug
> @@ -14,20 +14,6 @@ config ARM64_PTDUMP
> kernel.
> If in doubt, say "N"
>
> -config STRICT_DEVMEM
> - bool "Filter access to /dev/mem"
> - depends on MMU
> - help
> - If this option is disabled, you allow userspace (root) access to all
> - of memory, including kernel and userspace memory. Accidental
> - access to this is obviously disastrous, but specific access can
> - be used by people debugging the kernel.
> -
> - If this option is switched on, the /dev/mem file only allows
> - userspace access to memory mapped peripherals.
> -
> - If in doubt, say Y.
> -
> config PID_IN_CONTEXTIDR
> bool "Write the current PID to the CONTEXTIDR register"
> help
For arm64:
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
prev parent reply other threads:[~2015-11-23 10:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-22 3:57 [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug Dan Williams
2015-11-22 3:57 ` Dan Williams
2015-11-22 3:57 ` [PATCH 2/2] restrict /dev/mem to idle io memory ranges Dan Williams
2015-11-22 3:57 ` Dan Williams
2015-11-23 19:00 ` Kees Cook
2015-11-23 8:12 ` [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug Ingo Molnar
2015-11-23 17:12 ` Dan Williams
2015-11-23 18:56 ` Kees Cook
2015-11-24 8:27 ` Ingo Molnar
2015-11-23 9:53 ` Heiko Carstens
2015-11-23 9:53 ` Heiko Carstens
2015-11-23 17:09 ` Dan Williams
2015-11-23 10:19 ` Catalin Marinas [this message]
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