linux-kernel - Re: [PATCH printk v1 1/1] printk: nbcon: Allow unsafe write

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: <aNE284aQjIcIpDpQ@pathway.suse.cz>
Date: Mon, 22 Sep 2025 13:45:55 +0200
From: Petr Mladek <pmladek@...e.com>
To: John Ogness <john.ogness@...utronix.de>
Cc: Sergey Senozhatsky <senozhatsky@...omium.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Breno Leitao <leitao@...ian.org>, Mike Galbraith <efault@....de>,
	linux-kernel@...r.kernel.org,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH printk v1 1/1] printk: nbcon: Allow unsafe write_atomic()
 for panic

On Mon 2025-09-22 12:50:04, John Ogness wrote:
> On 2025-09-17, Petr Mladek <pmladek@...e.com> wrote:
> >> After weighing the pros/cons I think that a global variable makes the
> >> most sense. It will simplify internal APIs and provide all
> >> console_is_usable() users a correct value. And the end result is no
> >> different than what we do now.
> >> 
> >> We could also keep its setting inside nbcon_atomic_flush_unsafe() so
> >> that the variable remains a printk-internal variable.
> >
> > Sounds good to me.
> 
> Right now things are a bit of a mess with required changes sitting in
> printk and mm trees. Since this won't be going in to the upcoming merge
> window, I will wait with v2 until you (Petr) can officially rebase the
> printk tree to include the recent panic_*cpu*() changes. That will also
> make it easier to coordinate the upcoming console_is_usable() changes as
> well.

Makes sense.

> The functionality for v2 is the same as the v1, so the network folks can
> continue working on the nbcon netconsole implementation.

Yup.

Best Regards,
Petr