linux-kernel - [PATCH 0/2] mm: memfd_luo: preserve file seals

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Message-ID: <20260123095854.535058-1-pratyush@kernel.org>
Date: Fri, 23 Jan 2026 10:58:49 +0100
From: Pratyush Yadav <pratyush@...nel.org>
To: Alexander Graf <graf@...zon.com>,
	Mike Rapoport <rppt@...nel.org>,
	Pasha Tatashin <pasha.tatashin@...een.com>,
	Pratyush Yadav <pratyush@...nel.org>,
	Hugh Dickins <hughd@...gle.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc: Jason Gunthorpe <jgg@...dia.com>,
	Samiullah Khawaja <skhawaja@...gle.com>,
	kexec@...ts.infradead.org,
	linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 0/2] mm: memfd_luo: preserve file seals

From: "Pratyush Yadav (Google)" <pratyush@...nel.org>

Hi,

This series adds support for preserving file seals when preserving a
memfd using LUO. Patch 1 exports some memfd seal manipulation functions
and patch 2 adds support for preserving them. Since it makes changes to
the serialized data structure for memfd, it also bumps the version
number.

I also plan to add some tests for this. I quickly hacked together
something to test this series, but I am working on some patches
that would add multiple selftests for memfd preservation. It might take
me a couple weeks to get to it, so sending the main support now in the
hopes of making it into the upcoming merge window.

Regards,
Pratyush Yadav

Pratyush Yadav (Google) (2):
  memfd: export memfd_{add,get}_seals()
  mm: memfd_luo: preserve file seals

 include/linux/kho/abi/memfd.h |  9 ++++++++-
 include/linux/memfd.h         | 12 ++++++++++++
 mm/memfd.c                    |  4 ++--
 mm/memfd_luo.c                | 23 +++++++++++++++++++++--
 4 files changed, 43 insertions(+), 5 deletions(-)

-- 
2.52.0.457.g6b5491de43-goog