linux-kernel - Re: [ANNOUNCE] v5.12-rc3-rt3

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: <e984000bf56be980f87c39bf644e139e4c39ddbf.camel@gmx.de>
Date:   Mon, 22 Mar 2021 04:10:28 +0100
From:   Mike Galbraith <efault@....de>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        linux-rt-users <linux-rt-users@...r.kernel.org>,
        Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [ANNOUNCE] v5.12-rc3-rt3

On Sun, 2021-03-21 at 08:46 +0100, Mike Galbraith wrote:
> On Sat, 2021-03-20 at 09:18 +0100, Mike Galbraith wrote:
> > On Fri, 2021-03-19 at 23:33 +0100, Sebastian Andrzej Siewior wrote:
> > > Dear RT folks!
> > >
> > > I'm pleased to announce the v5.12-rc3-rt3 patch set.
> >
> > My little rpi4b is fairly unhappy with 5.12-rt, whereas 5.11-rt works
> > fine on it.  The below spew is endless, making boot endless.  I turned
> > it into a WARN_ON_ONCE to see if the thing would finish boot, and
> > surprisingly, it seems perfectly fine with that bad idea. Having not
> > the foggiest clue what I'm doing down in arm arch-land, bug is in no
> > immediate danger :)
>
> Actually, it looks like a defenseless little buglet, and this gripe
> simply wants to be disabled for RT.

Or completely removed instead.

It's entirely possible I'm missing something obvious to arm experts,
but I don't _think_ the register read needs protection, leaving me
wondering why arch_faults_on_old_pte() was born with that warning.

	-Mike