linux-kernel - Re: Linux 4.15-rc2: Regression in resume from ACPI S3

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:   Fri, 15 Dec 2017 10:05:23 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Maarten Lankhorst <dev@...ankhorst.nl>,
        Michal Hocko <mhocko@...nel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Andy Lutomirski <luto@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        the arch/x86 maintainers <x86@...nel.org>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        linux-pci@...r.kernel.org, linux-pm@...r.kernel.org
Subject: Re: Linux 4.15-rc2: Regression in resume from ACPI S3

On Thu, 14 Dec 2017, Linus Torvalds wrote:

> On Thu, Dec 14, 2017 at 2:36 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
> >
> > But, because the silly firmware comes out of suspend with all PIC lines
> > unmasked for whatever reason, the PIC can observe that IRQ being raised and
> > the CPU not handling it. So yes, I forgot about 7 being magic, but I still
> > think it's the firmware which causes it by unmasking the PIC irqs.
> 
> Yes, that sounds quite likely.

And just for the record I was able to figure out which interrupt comes in
and goes away again. It's the only level triggered interrupt, which is the
ACPI interrupt.....

Thanks,

	tglx