linux-kernel - Re: [BUG] mutex deadlock of dpm_resume() in low memory situation

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]

Date: Wed, 27 Dec 2023 21:50:01 +0100
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Greg KH <gregkh@...uxfoundation.org>, Youngmin Nam <youngmin.nam@...sung.com>
Cc: len.brown@...el.com, pavel@....cz, linux-pm@...r.kernel.org, 
	linux-kernel@...r.kernel.org, d7271.choe@...sung.com, 
	janghyuck.kim@...sung.com, hyesoo.yu@...sung.com, 
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: [BUG] mutex deadlock of dpm_resume() in low memory situation

On Wed, Dec 27, 2023 at 7:58 PM Rafael J. Wysocki <rjw@...ysocki.net> wrote:
>
> On Wednesday, December 27, 2023 7:39:20 PM CET Rafael J. Wysocki wrote:
> > On Wednesday, December 27, 2023 5:08:40 PM CET Greg KH wrote:
> > > On Wed, Dec 27, 2023 at 05:42:50PM +0900, Youngmin Nam wrote:
> > > > Could you look into this issue ?
> > >
> > > Can you submit a patch that resolves the issue for you, as you have a
> > > way to actually test this out?  That would be the quickest way to get it
> > > resolved, and to help confirm that this is even an issue at all.
> >
> > Something like the appended patch should be sufficient to address this AFAICS.
> >
> > I haven't tested it yet (will do so shortly), so all of the usual disclaimers
> > apply.
> >
> > I think that it can be split into 2 patches, but for easier testing here
> > it goes in one piece.
>
> Well, please scratch this, it will not handle "async" devices properly.

This

https://lore.kernel.org/linux-pm/6019796.lOV4Wx5bFT@kreacher/

should address the issue properly (it has been lightly tested).

Please give it a go and let me know if it works for you (on top of 6.7-rc7).