linux-kernel - Re: commit 894d1b3db41c leads to frequent hangs when booting

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: <CANDhNCoNMtjKmgWbCfScK1xGqQrKTh2a0cw+VYTgiT-dw2haLQ@mail.gmail.com>
Date: Wed, 11 Dec 2024 15:14:22 -0800
From: John Stultz <jstultz@...gle.com>
To: Bert Karwatzki <spasswolf@....de>
Cc: Metin.Kaya@....com, boqun.feng@...il.com, bsegall@...gle.com, 
	daniel.lezcano@...aro.org, dave@...olabs.net, dietmar.eggemann@....com, 
	joelaf@...gle.com, juri.lelli@...hat.com, kernel-team@...roid.com, 
	kprateek.nayak@....com, linux-kernel@...r.kernel.org, longman@...hat.com, 
	mgorman@...e.de, mingo@...hat.com, paulmck@...nel.org, peterz@...radead.org, 
	qyousef@...alina.io, rostedt@...dmis.org, tglx@...utronix.de, 
	vincent.guittot@...aro.org, vschneid@...hat.com, will@...nel.org, 
	xuewen.yan94@...il.com, zezeozue@...gle.com
Subject: Re: commit 894d1b3db41c leads to frequent hangs when booting

On Wed, Dec 11, 2024 at 2:46 PM Bert Karwatzki <spasswolf@....de> wrote:
>
> Am Mittwoch, dem 11.12.2024 um 22:35 +0100 schrieb Bert Karwatzki:
> > I have confirmed that I that linux-next-20241210 is fixed by the same revert
> > as v6.13-rc2 (ten boots without incident is the criterion for a good commit)
> >
> >
> > Bert Karwatzki
>
> Also this bug only occurs with CONFIG_PREEMPT_RT=y, I've just checked v6.13-rc2
> without the revert and the following preempt settings and got 10 clean boots:
>

Hrm. That matches the case where the fix here helped:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=82f9cc094975240885c93effbca7f4603f5de1bf

I'm still working on getting a minimal delta from your config booting
in my environment, but in the meantime, I'd be curious if the
following reduced revert helps?
  https://github.com/johnstultz-work/linux-dev/commit/60c60f85670fb1f4708adbe55e15ab918d96f9f0

Basically just trying to clarify if the problem is moving the wakeup
to the wake_q or if some other interaction (maybe with the
preempt_disables) could be causing the issue.
(I'm assuming you have 82f9cc094975 applied when you test with that change)

thanks
-john