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Date: Mon, 25 Jun 2018 16:51:30 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: Thomas Garnier <thgarnie@...gle.com>, kernel-hardening@...ts.openwall.com
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
Josh Poimboeuf <jpoimboe@...hat.com>,
Philippe Ombredanne <pombredanne@...b.com>,
Kate Stewart <kstewart@...uxfoundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Francis Deslauriers <francis.deslauriers@...icios.com>,
"H.J. Lu" <hjl.tools@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 23/27] x86/modules: Adapt module loading for PIE
support
On 06/25/18 15:39, Thomas Garnier wrote:
> Adapt module loading to support PIE relocations. Generate dynamic GOT if
> a symbol requires it but no entry exists in the kernel GOT.
Hi,
This patch description (and a few others with the same sentence) is a little
confusing to me:
> Position Independent Executable (PIE) support will allow to extend the
> KASLR randomization range 0xffffffff80000000.
Is there a word missing after "range"? May "below"?
As is, it seems to imply "range by 0xffffffff80000000."
thanks.
>
> Signed-off-by: Thomas Garnier <thgarnie@...gle.com>
> ---
> arch/x86/Makefile | 4 +
> arch/x86/include/asm/module.h | 11 ++
> arch/x86/include/asm/sections.h | 4 +
> arch/x86/kernel/module.c | 181 +++++++++++++++++++++++++++++++-
> arch/x86/kernel/module.lds | 3 +
> 5 files changed, 198 insertions(+), 5 deletions(-)
> create mode 100644 arch/x86/kernel/module.lds
--
~Randy
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