Re: [PATCHv2] arm64: Fix R/O permissions in mark_rodata_ro

From	Catalin Marinas <catalin.marinas@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCHv2] arm64: Fix R/O permissions in mark_rodata_ro
Date	2015-11-18 13:20 +0100
Message-ID	<qw9Sq-2Jt-13@gated-at.bofh.it> (permalink)
References	<qtwLw-7rg-3@gated-at.bofh.it> <qu6Fk-5dX-19@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Thu, Nov 12, 2015 at 12:21:10PM -0800, Laura Abbott wrote:
> The permissions in mark_rodata_ro trigger a build error
> with STRICT_MM_TYPECHECKS. Fix this by introducing
> PAGE_KERNEL_ROX for the same reasons as PAGE_KERNEL_RO.
> From Ard:
> 
> "PAGE_KERNEL_EXEC has PTE_WRITE set as well, making the range
> writeable under the ARMv8.1 DBM feature, that manages the
> dirty bit in hardware (writing to a page with the PTE_RDONLY
> and PTE_WRITE bits both set will clear the PTE_RDONLY bit in that case)"
> 
> Signed-off-by: Laura Abbott <labbott@fedoraproject.org>

Applied. Thanks.

-- 
Catalin
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Re: [PATCHv2] arm64: Fix R/O permissions in mark_rodata_ro Catalin Marinas <catalin.marinas@arm.com> - 2015-11-18 13:20 +0100

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