[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <20151118121450.GF27495@e104818-lin.cambridge.arm.com>
Date: Wed, 18 Nov 2015 12:14:50 +0000
From: Catalin Marinas <catalin.marinas@....com>
To: Laura Abbott <labbott@...oraproject.org>
Cc: Will Deacon <will.deacon@....com>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCHv2] arm64: Fix R/O permissions in mark_rodata_ro
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@...oraproject.org>
Applied. Thanks.
--
Catalin
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists