Fairly reproduceable crash in 3.7.1 Null pointer rb_erase+0xc4/0x292

Fairly reproduceable crash in 3.7.1 Null pointer rb_erase+0xc4/0x292

[Marc MERLIN]

Google only shows hits pointing to an ext4 patch that didn't go in 3.7
proper.

http://marc.merlins.org/tmp/crash.jpg

My call trace doesn't look copmlete, but shows "fatal exception in interrupt" and:
timerqueue_del
__remove_hrtimer
__run_htrimer
hrtimer_interruypt
smp_apic_timer_interrupt
<???>
paravirt_read_tpe
intel_idle
intel_idle
cpuidle_enter

I had pretty repeated crashes when plugging power back into my running
laptop, but the display just freezes and I can't get a dump.

For the crash here, I did: suspend to RAM, plug power back in, wake up.
Laptop crashed about 3 seconds after wakeup.

I'm on vacation with no hardware to get a proper crash dump or even
serial console, but I have a bad screenshot.

Boy do I wish this could be saved in some kind of NVRAM instead like on
android.


Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/

Re: Fairly reproduceable crash in 3.7.1 Null pointer rb_erase+0xc4/0x292

[Marc MERLIN]

On Wed, Jan 02, 2013 at 02:27:57PM -0800, Marc MERLIN wrote:
> Google only shows hits pointing to an ext4 patch that didn't go in 3.7
> proper.
> 
> http://marc.merlins.org/tmp/crash.jpg

Grumble, I kind of forgot to add the link to my .config, sorry about
that:
http://marc.merlins.org/tmp/.config-3.7.1-amd64-preempt-20121226

While my crash picture is lame (sorry), I'm happy to provide what else I
can before I go home and can provide a proper serial console crash dump.

Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/

Re: Fairly reproduceable crash in 3.7.1 Null pointer rb_erase+0xc4/0x292

[Romain Francoise]

Marc MERLIN <marc@merlins.org> writes:

> I had pretty repeated crashes when plugging power back into my running
> laptop, but the display just freezes and I can't get a dump.

> For the crash here, I did: suspend to RAM, plug power back in, wake up.
> Laptop crashed about 3 seconds after wakeup.

Sounds like https://bugzilla.kernel.org/show_bug.cgi?id=51661 which is
fixed by 3935e89505a1c3ab3f3b0c7ef0eae54124f48905 ("watchdog: Fix
disable/enable regression"), expect that in 3.7.2...

Re: Fairly reproduceable crash in 3.7.1 Null pointer rb_erase+0xc4/0x292

[Marc MERLIN]

On Thu, Jan 03, 2013 at 08:12:18AM +0100, Romain Francoise wrote:
> Marc MERLIN <marc@merlins.org> writes:
> 
> > I had pretty repeated crashes when plugging power back into my running
> > laptop, but the display just freezes and I can't get a dump.
> 
> > For the crash here, I did: suspend to RAM, plug power back in, wake up.
> > Laptop crashed about 3 seconds after wakeup.
> 
> Sounds like https://bugzilla.kernel.org/show_bug.cgi?id=51661 which is
> fixed by 3935e89505a1c3ab3f3b0c7ef0eae54124f48905 ("watchdog: Fix
> disable/enable regression"), expect that in 3.7.2...

That looks like a good match, thank you. 
Hopefully this quick thread will help google steer folks who do get a
crash to the right page and fix.

Cheers,
Marc
-- 
"A mouse is a device used to point at the xterm you want to type in" - A.S.R.
Microsoft is to operating systems ....
                                      .... what McDonalds is to gourmet cooking
Home page: http://marc.merlins.org/