linux-kernel - [PATCH v3 0/9] Various mm kselftests improvements/fixes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260122170224.4056513-1-kevin.brodsky@arm.com>
Date: Thu, 22 Jan 2026 17:02:15 +0000
From: Kevin Brodsky <kevin.brodsky@....com>
To: linux-mm@...ck.org,
	linux-kselftest@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Kevin Brodsky <kevin.brodsky@....com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Hildenbrand <david@...nel.org>,
	Dev Jain <dev.jain@....com>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Mark Brown <broonie@...nel.org>,
	Ryan Roberts <ryan.roberts@....com>,
	Shuah Khan <shuah@...nel.org>
Subject: [PATCH v3 0/9] Various mm kselftests improvements/fixes

Various improvements/fixes for the mm kselftests:

- Patch 1-3 extend support for more build configurations: out-of-tree
  $KDIR, cross-compilation, etc.

- Patch 4-7 fix issues related to faulting in pages, introducing a new
  helper for that purpose.

- Patch 8 fixes the value returned by pagemap_ioctl (PASS was always
  returned, which explains why the issue fixed in patch 6 went
  unnoticed).

- Patch 9 improves the exit code of pfnmap.

Net results:
- 1 test no longer fails (patch 7)
- 3 tests are no longer skipped (patch 4)
- More accurate return values for whole suites (patch 8, 9)
- Extra tests are more likely to be built (patch 1-3)

---
v2..v3:
- Patch 5: new patch [David Hildenbrand]
- Patch 6: make the helper take a number of pages + pagesize, rename to
  force_read_pages() [David]
- Patch 7: improved page count calculation (avoiding floating-point
  helper)
- Patch 7: added Fixes tag [David]
- Patch 9: open the file only once and save the fd [David]
- Collected R-b/A-b

v2: https://lore.kernel.org/all/20260107164842.3289559-1-kevin.brodsky@arm.com/

v1..v2:
- New patches: 1, 4, 5, 8

v1: https://lore.kernel.org/all/20251216142633.2401447-1-kevin.brodsky@arm.com/
---
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: David Hildenbrand <david@...nel.org>
Cc: Dev Jain <dev.jain@....com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Ryan Roberts <ryan.roberts@....com>
Cc: Shuah Khan <shuah@...nel.org>
---
Kevin Brodsky (9):
  selftests/mm: default KDIR to build directory
  selftests/mm: remove flaky header check
  selftests/mm: pass down full CC and CFLAGS to check_config.sh
  selftests/mm: fix usage of FORCE_READ() in cow tests
  selftests/mm: check that FORCE_READ() succeeded
  selftests/mm: introduce helper to read every page
  selftests/mm: fix faulting-in code in pagemap_ioctl test
  selftests/mm: fix exit code in pagemap_ioctl
  selftests/mm: report SKIP in pfnmap if a check fails

 tools/testing/selftests/mm/Makefile           |  8 +-
 tools/testing/selftests/mm/check_config.sh    |  3 +-
 tools/testing/selftests/mm/cow.c              | 43 +++++++--
 tools/testing/selftests/mm/hugetlb-madvise.c  |  9 +-
 tools/testing/selftests/mm/page_frag/Makefile |  2 +-
 tools/testing/selftests/mm/pagemap_ioctl.c    | 15 ++-
 tools/testing/selftests/mm/pfnmap.c           | 93 +++++++++++--------
 .../selftests/mm/split_huge_page_test.c       |  6 +-
 tools/testing/selftests/mm/vm_util.h          |  7 ++
 9 files changed, 109 insertions(+), 77 deletions(-)


base-commit: 24d479d26b25bce5faea3ddd9fa8f3a6c3129ea7
-- 
2.51.2