Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug

From	Catalin Marinas <catalin.marinas@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug
Date	2015-11-23 11:20 +0100
Message-ID	<qxWo3-pd-21@gated-at.bofh.it> (permalink)
References	<qxtYK-6Ax-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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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>
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[PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in  lib/Kconfig.debug Dan Williams <dan.j.williams@intel.com> - 2015-11-22 05:00 +0100
  [PATCH 2/2] restrict /dev/mem to idle io memory ranges Dan Williams <dan.j.williams@intel.com> - 2015-11-22 05:00 +0100
    Re: [PATCH 2/2] restrict /dev/mem to idle io memory ranges Kees Cook <keescook@chromium.org> - 2015-11-23 20:10 +0100
  Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in  lib/Kconfig.debug Ingo Molnar <mingo@kernel.org> - 2015-11-23 09:20 +0100
    Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug Dan Williams <dan.j.williams@intel.com> - 2015-11-23 18:20 +0100
      Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug Kees Cook <keescook@chromium.org> - 2015-11-23 20:00 +0100
        Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in  lib/Kconfig.debug Ingo Molnar <mingo@kernel.org> - 2015-11-24 09:30 +0100
  Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in  lib/Kconfig.debug Heiko Carstens <heiko.carstens@de.ibm.com> - 2015-11-23 11:00 +0100
    Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug Dan Williams <dan.j.williams@intel.com> - 2015-11-23 18:20 +0100
  Re: [PATCH 1/2] arch: consolidate CONFIG_STRICT_DEVM in  lib/Kconfig.debug Catalin Marinas <catalin.marinas@arm.com> - 2015-11-23 11:20 +0100

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