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Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code

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On Wed, 3 Feb 2016, Nikolay Borisov wrote:
> 
> It seems when the code tries to do prev->next = next in __list_del from detach_timer, 
> rax has a value of dead000000200200 (LIST_POISON2).

> So in this case the prev/next entries do not look like corrupted, whereas
> when manipulating the list inside detach_timer they do. This is really
> odd, any ideas how to further debug this?

Please enable

CONFIG_DEBUG_OBJECTS
CONFIG_DEBUG_OBJECTS_TIMERS
CONFIG_DEBUG_OBJECTS_WORK

That should pinpoint the offending code.

Thanks,

	tglx

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crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov <kernel@kyup.com> - 2016-02-03 12:00 +0100
  Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Thomas Gleixner <tglx@linutronix.de> - 2016-02-04 10:00 +0100
  Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-02-04 12:40 +0100
    Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov <kernel@kyup.com> - 2016-02-04 13:00 +0100
      Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-02-04 13:20 +0100
        Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-02-04 13:30 +0100
        Re: crash in 3.12.51 (likely in 3.12.52 as well) in timer code Nikolay Borisov <kernel@kyup.com> - 2016-02-04 13:30 +0100

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