linux-kernel - Re: [PATCH 5.4.y 0/3] Backport series: "permit write-sealed memfd read-only shared mappings"

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-prev] [day] [month] [year] [list]

Message-ID: <aIl8lyrHJ4DAQkxg@google.com>
Date: Tue, 29 Jul 2025 18:59:51 -0700
From: Isaac Manjarres <isaacmanjarres@...gle.com>
To: Matthew Wilcox <willy@...radead.org>
Cc: lorenzo.stoakes@...cle.com, gregkh@...uxfoundation.org,
	Muchun Song <muchun.song@...ux.dev>,
	Oscar Salvador <osalvador@...e.de>,
	David Hildenbrand <david@...hat.com>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Liam R. Howlett" <Liam.Howlett@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
	Suren Baghdasaryan <surenb@...gle.com>,
	Michal Hocko <mhocko@...e.com>, Kees Cook <kees@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	Jann Horn <jannh@...gle.com>, Pedro Falcato <pfalcato@...e.de>,
	Hugh Dickins <hughd@...gle.com>,
	Baolin Wang <baolin.wang@...ux.alibaba.com>, aliceryhl@...gle.com,
	stable@...r.kernel.org, kernel-team@...roid.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 5.4.y 0/3] Backport series: "permit write-sealed memfd
 read-only shared mappings"

On Wed, Jul 30, 2025 at 02:27:29AM +0100, Matthew Wilcox wrote:
> On Tue, Jul 29, 2025 at 05:58:05PM -0700, Isaac J. Manjarres wrote:
> > Lorenzo's series [2] fixed that issue and was merged in kernel version
> > 6.7, but was not backported to older kernels. So, this issue is still
> > present on kernels 5.4, 5.10, 5.15, 6.1, and 6.6.
> > 
> > This series backports Lorenzo's series to the 5.4 kernel.
> 
> That's not how this works.  First you do 6.6, then 6.1, then 5.15 ...

Hey Matthew,

Thanks for pointing that out. I'm sorry about the confusion. I did
prepare backports for the other kernel versions too, and the intent
was to send them together. However, my machine only sent the 5.4
version of the patches and not the rest.

I sent the patches for each kernel version and here are the relevant
links:

6.6: https://lore.kernel.org/all/20250730015152.29758-1-isaacmanjarres@google.com/
6.1: https://lore.kernel.org/all/20250730015247.30827-1-isaacmanjarres@google.com/
5.15: https://lore.kernel.org/all/20250730015337.31730-1-isaacmanjarres@google.com/
5.10: https://lore.kernel.org/all/20250730015406.32569-1-isaacmanjarres@google.com/

> Otherwise somebody might upgrade from 5.4 to 6.1 and see a regression.

Understood; sorry again for the confusion.

Thanks,
Isaac