The patch titled
Subject: kselftest: vm: fix tabs/spaces inconsistency in the mdwe test
has been added to the -mm mm-unstable branch. Its filename is
kselftest-vm-fix-tabs-spaces-inconsistency-in-the-mdwe-test.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/kselftest-vm-fix-tabs-spaces-inconsistency-in-the-mdwe-test.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Florent Revest <revest@xxxxxxxxxxxx>
Subject: kselftest: vm: fix tabs/spaces inconsistency in the mdwe test
Date: Mon, 28 Aug 2023 17:08:53 +0200
Patch series "MDWE without inheritance", v4.
Joey recently introduced a Memory-Deny-Write-Executable (MDWE) prctl which
tags current with a flag that prevents pages that were previously not
executable from becoming executable. This tag always gets inherited by
children tasks. (it's in MMF_INIT_MASK)
At Google, we've been using a somewhat similar downstream patch for a few
years now. To make the adoption of this feature easier, we've had it
support a mode in which the W^X flag does not propagate to children. For
example, this is handy if a C process which wants W^X protection suspects
it could start children processes that would use a JIT.
I'd like to align our features with the upstream prctl. This series
proposes a new NO_INHERIT flag to the MDWE prctl to make this kind of
adoption easier. It sets a different flag in current that is not in
MMF_INIT_MASK and which does not propagate.
As part of looking into MDWE, I also fixed a couple of things in the MDWE
test.
This patch (of 6):
Fix tabs/spaces inconsistency in the mdwe test.
Link: https://lkml.kernel.org/r/20230828150858.393570-1-revest@xxxxxxxxxxxx
Link: https://lkml.kernel.org/r/20230828150858.393570-2-revest@xxxxxxxxxxxx
Signed-off-by: Florent Revest <revest@xxxxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Alexey Izbyshev <izbyshev@xxxxxxxxx>
Cc: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Cc: Ayush Jain <ayush.jain3@xxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Joey Gouly <joey.gouly@xxxxxxx>
Cc: KP Singh <kpsingh@xxxxxxxxxx>
Cc: Mark Brown <broonie@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Szabolcs Nagy <Szabolcs.Nagy@xxxxxxx>
Cc: Topi Miettinen <toiwoton@xxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/mdwe_test.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/tools/testing/selftests/mm/mdwe_test.c~kselftest-vm-fix-tabs-spaces-inconsistency-in-the-mdwe-test
+++ a/tools/testing/selftests/mm/mdwe_test.c
@@ -49,19 +49,19 @@ FIXTURE_VARIANT(mdwe)
FIXTURE_VARIANT_ADD(mdwe, stock)
{
- .enabled = false,
+ .enabled = false,
.forked = false,
};
FIXTURE_VARIANT_ADD(mdwe, enabled)
{
- .enabled = true,
+ .enabled = true,
.forked = false,
};
FIXTURE_VARIANT_ADD(mdwe, forked)
{
- .enabled = true,
+ .enabled = true,
.forked = true,
};
_
Patches currently in -mm which might be from revest@xxxxxxxxxxxx are
kselftest-vm-fix-tabs-spaces-inconsistency-in-the-mdwe-test.patch
kselftest-vm-fix-mdwes-mmap_fixed-test-case.patch
kselftest-vm-check-errnos-in-mdwe_test.patch
mm-make-pr_mdwe_refuse_exec_gain-an-unsigned-long.patch
mm-add-a-no_inherit-flag-to-the-pr_set_mdwe-prctl.patch
kselftest-vm-add-tests-for-no-inherit-memory-deny-write-execute.patch
