From: Tycho Andersen <tycho@docker.com>
To: Kees Cook <keescook@chromium.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Linux-MM <linux-mm@kvack.org>,
"kernel-hardening@lists.openwall.com"
<kernel-hardening@lists.openwall.com>,
Marco Benatto <marco.antonio.780@gmail.com>,
Juerg Haefliger <juerg.haefliger@canonical.com>
Subject: Re: [PATCH v5 10/10] lkdtm: Add test for XPFO
Date: Mon, 14 Aug 2017 14:29:47 -0600 [thread overview]
Message-ID: <20170814202947.er7uparyhplm77ei@smitten> (raw)
In-Reply-To: <CAGXu5jLp11wqM04L5bWbmSVZBTOYnuGNjsjTitzUOFJm=pn9Fg@mail.gmail.com>
On Mon, Aug 14, 2017 at 12:10:47PM -0700, Kees Cook wrote:
> On Wed, Aug 9, 2017 at 1:07 PM, Tycho Andersen <tycho@docker.com> wrote:
> > From: Juerg Haefliger <juerg.haefliger@hpe.com>
> >
> > This test simply reads from userspace memory via the kernel's linear
> > map.
> >
> > hugepages is only supported on x86 right now, hence the ifdef.
>
> I'd prefer that the #ifdef is handled in the .c file. The result is
> that all architectures will have the XPFO_READ_USER_HUGE test, but it
> can just fail when not available. This means no changes are needed for
> lkdtm in the future and the test provides an actual test of hugepages
> coverage.
If failing tests is okay, I think we can just drop that hunk entirely.
Everything compiles fine, it just doesn't work :). I'll do that for
the next version.
Tycho
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next prev parent reply other threads:[~2017-08-14 20:29 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 20:07 [PATCH v5 00/10] Add support for eXclusive Page Frame Ownership Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 01/10] mm: add MAP_HUGETLB support to vm_mmap Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 02/10] mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) Tycho Andersen
2017-08-14 18:51 ` Laura Abbott
2017-08-14 22:30 ` Laura Abbott
2017-08-15 3:47 ` Tycho Andersen
2017-08-15 3:51 ` Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 03/10] swiotlb: Map the buffer if it was unmapped by XPFO Tycho Andersen
2017-08-10 13:01 ` Konrad Rzeszutek Wilk
2017-08-10 16:22 ` Tycho Andersen
2017-09-20 16:19 ` Dave Hansen
2017-09-20 22:47 ` Tycho Andersen
2017-09-20 23:25 ` Dave Hansen
2017-08-09 20:07 ` [PATCH v5 04/10] arm64: Add __flush_tlb_one() Tycho Andersen
2017-08-12 11:26 ` [kernel-hardening] " Mark Rutland
2017-08-14 16:35 ` Tycho Andersen
2017-08-14 16:50 ` Mark Rutland
2017-08-14 17:01 ` Tycho Andersen
2017-08-23 16:58 ` Tycho Andersen
2017-08-23 17:04 ` Mark Rutland
2017-08-23 17:13 ` Tycho Andersen
2017-08-24 15:45 ` Mark Rutland
2017-08-29 17:24 ` Tycho Andersen
2017-08-30 5:31 ` Juerg Haefliger
2017-08-30 16:47 ` Tycho Andersen
2017-08-31 9:43 ` Juerg Haefliger
2017-08-31 9:47 ` Mark Rutland
2017-08-31 21:21 ` Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 05/10] arm64/mm: Add support for XPFO Tycho Andersen
2017-08-11 18:01 ` [kernel-hardening] " Laura Abbott
2017-08-11 20:19 ` Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 06/10] arm64/mm: Disable section mappings if XPFO is enabled Tycho Andersen
2017-08-11 17:25 ` [kernel-hardening] " Laura Abbott
2017-08-11 21:13 ` Tycho Andersen
2017-08-11 21:52 ` Tycho Andersen
2017-08-12 11:17 ` Mark Rutland
2017-08-14 16:22 ` Tycho Andersen
2017-08-14 18:42 ` Laura Abbott
2017-08-14 20:28 ` Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 07/10] arm64/mm: Don't flush the data cache if the page is unmapped by XPFO Tycho Andersen
2017-08-12 11:57 ` [kernel-hardening] " Mark Rutland
2017-08-14 16:54 ` Mark Rutland
2017-08-14 20:27 ` Tycho Andersen
2017-08-15 9:39 ` Mark Rutland
2017-08-09 20:07 ` [PATCH v5 08/10] arm64/mm: Add support for XPFO to swiotlb Tycho Andersen
2017-08-10 13:11 ` Konrad Rzeszutek Wilk
2017-08-10 16:35 ` Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 09/10] mm: add a user_virt_to_phys symbol Tycho Andersen
2017-08-09 20:07 ` [PATCH v5 10/10] lkdtm: Add test for XPFO Tycho Andersen
2017-08-12 20:24 ` kbuild test robot
2017-08-14 16:21 ` Tycho Andersen
2017-08-12 21:05 ` kbuild test robot
2017-08-14 19:10 ` Kees Cook
2017-08-14 20:29 ` Tycho Andersen [this message]
2017-08-11 23:35 ` [kernel-hardening] [PATCH v5 00/10] Add support for eXclusive Page Frame Ownership Laura Abbott
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