linux-kernel - Re: [PATCH v5 22/22] tests/liveupdate: Add in-kernel liveupdate test

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

Message-ID: <CA+CK2bBVRHwBu6a77gkvsbmWkQFDcTvNo+5aOT586mie13zqqA@mail.gmail.com>
Date: Wed, 12 Nov 2025 15:40:53 -0500
From: Pasha Tatashin <pasha.tatashin@...een.com>
To: Mike Rapoport <rppt@...nel.org>
Cc: pratyush@...nel.org, jasonmiu@...gle.com, graf@...zon.com, 
	dmatlack@...gle.com, rientjes@...gle.com, corbet@....net, 
	rdunlap@...radead.org, ilpo.jarvinen@...ux.intel.com, kanie@...ux.alibaba.com, 
	ojeda@...nel.org, aliceryhl@...gle.com, masahiroy@...nel.org, 
	akpm@...ux-foundation.org, tj@...nel.org, yoann.congal@...le.fr, 
	mmaurer@...gle.com, roman.gushchin@...ux.dev, chenridong@...wei.com, 
	axboe@...nel.dk, mark.rutland@....com, jannh@...gle.com, 
	vincent.guittot@...aro.org, hannes@...xchg.org, dan.j.williams@...el.com, 
	david@...hat.com, joel.granados@...nel.org, rostedt@...dmis.org, 
	anna.schumaker@...cle.com, song@...nel.org, zhangguopeng@...inos.cn, 
	linux@...ssschuh.net, linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org, 
	linux-mm@...ck.org, gregkh@...uxfoundation.org, tglx@...utronix.de, 
	mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com, x86@...nel.org, 
	hpa@...or.com, rafael@...nel.org, dakr@...nel.org, 
	bartosz.golaszewski@...aro.org, cw00.choi@...sung.com, 
	myungjoo.ham@...sung.com, yesanishhere@...il.com, Jonathan.Cameron@...wei.com, 
	quic_zijuhu@...cinc.com, aleksander.lobakin@...el.com, ira.weiny@...el.com, 
	andriy.shevchenko@...ux.intel.com, leon@...nel.org, lukas@...ner.de, 
	bhelgaas@...gle.com, wagi@...nel.org, djeffery@...hat.com, 
	stuart.w.hayes@...il.com, ptyadav@...zon.de, lennart@...ttering.net, 
	brauner@...nel.org, linux-api@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	saeedm@...dia.com, ajayachandra@...dia.com, jgg@...dia.com, parav@...dia.com, 
	leonro@...dia.com, witu@...dia.com, hughd@...gle.com, skhawaja@...gle.com, 
	chrisl@...nel.org
Subject: Re: [PATCH v5 22/22] tests/liveupdate: Add in-kernel liveupdate test

On Wed, Nov 12, 2025 at 3:24 PM Mike Rapoport <rppt@...nel.org> wrote:
>
> On Fri, Nov 07, 2025 at 04:03:20PM -0500, Pasha Tatashin wrote:
> > Introduce an in-kernel test module to validate the core logic of the
> > Live Update Orchestrator's File-Lifecycle-Bound feature. This
> > provides a low-level, controlled environment to test FLB registration
> > and callback invocation without requiring userspace interaction or
> > actual kexec reboots.
> >
> > The test is enabled by the CONFIG_LIVEUPDATE_TEST Kconfig option.
> >
> > Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>
> > ---
> >  kernel/liveupdate/luo_file.c     |   2 +
> >  kernel/liveupdate/luo_internal.h |   8 ++
> >  lib/Kconfig.debug                |  23 ++++++
> >  lib/tests/Makefile               |   1 +
> >  lib/tests/liveupdate.c           | 130 +++++++++++++++++++++++++++++++
> >  5 files changed, 164 insertions(+)
> >  create mode 100644 lib/tests/liveupdate.c
> >
> > diff --git a/kernel/liveupdate/luo_file.c b/kernel/liveupdate/luo_file.c
> > index 713069b96278..4c0a75918f3d 100644
> > --- a/kernel/liveupdate/luo_file.c
> > +++ b/kernel/liveupdate/luo_file.c
> > @@ -829,6 +829,8 @@ int liveupdate_register_file_handler(struct liveupdate_file_handler *fh)
> >       INIT_LIST_HEAD(&fh->flb_list);
> >       list_add_tail(&fh->list, &luo_file_handler_list);
> >
> > +     liveupdate_test_register(fh);
> > +
>
> Do it mean that every flb user will be added here?

No, FLB users will use:

liveupdate_register_flb() from various subsystems. This
liveupdate_test_register() is only to allow kernel test to register
test-FLBs to every single file-handler for in-kernel testing purpose
only.

Pasha