linux-kernel - Re: arm qemu boot failures in -next due to 'PM / Domains: add setter for dev.pm

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: <20160112001532.GD12777@atomide.com>
Date:	Mon, 11 Jan 2016 16:15:32 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	Russell King <linux@....linux.org.uk>,
	Kevin Hilman <khilman@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Subject: Re: arm qemu boot failures in -next due to 'PM / Domains: add setter
 for dev.pm_domain'

* Guenter Roeck <linux@...ck-us.net> [160111 15:40]:
> On 01/11/2016 02:49 PM, Rafael J. Wysocki wrote:
> >On Monday, January 11, 2016 12:04:50 PM Guenter Roeck wrote:
> >>On Mon, Jan 11, 2016 at 10:55:00AM -0800, Tony Lindgren wrote:
> >>>* Guenter Roeck <linux@...ck-us.net> [160111 09:51]:
> >>>>Hi,
> >>>>
> >>>>I see 6 out of 24 arm qemu tests failing in next-20160111. Bisect points
> >>>>to commit 989561de9b51 ("PM / Domains: add setter for dev.pm_domain").
> >>>>Failures are silent - there is no output on the console.
> >>>>Affected tests are
> >>>>
> >>>>arm:beagle:multi_v7_defconfig:omap3-beagle
> >>>>arm:beaglexm:multi_v7_defconfig:omap3-beagle-xm
> >>>>arm:overo:multi_v7_defconfig:omap3-overo-tobi
> >>>>arm:beagle:omap2plus_defconfig:omap3-beagle
> >>>>arm:beaglexm:omap2plus_defconfig:omap3-beagle-xm
> >>>>arm:overo:omap2plus_defconfig:omap3-overo-tobi
> >>>>
> >>>>For details please see the 'next' column at http://server.roeck-us.net:8010/builders.
> >>>>
> >>>>Reverting the offending commit fixes the problems.
> >>>>
> >>>>Please let me know if there is anything I can do to help tracking down the problem.
> >>>
> >>>The following fixes the booting, but I wonder if it's a
> >>
> >>Yes, it does.
> >>
> >>Tested-by: Guenter Roeck <linux@...ck-us.net>
> >>
> >>>proper fix?
> >>>
> >>That I don't know.
> >
> >If I'm not mistaken, what happens is that device_is_bound() tries to
> >dereference dev->p which is NULL.  If that's the case, the appended one
> >should help too.
> >
> >Can you please check?
> >
> >---
> >  drivers/base/dd.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> >Index: linux-pm/drivers/base/dd.c
> >===================================================================
> >--- linux-pm.orig/drivers/base/dd.c
> >+++ linux-pm/drivers/base/dd.c
> >@@ -234,7 +234,7 @@ late_initcall(deferred_probe_initcall);
> >   */
> >  bool device_is_bound(struct device *dev)
> >  {
> >-	return klist_node_attached(&dev->p->knode_driver);
> >+	return dev->p && klist_node_attached(&dev->p->knode_driver);
> 
> Yes, that fixes the problem as well.

Yeah works for me too:

Tested-by: Tony Lindgren <tony@...mide.com>