Re: [londroid] Reading Android Panic Logs?

From: Reuben
Sent on: Friday, December 23, 2011 9:58 AM
What stands out for me is the flood of "select [process] for kill" messages that start about halfway through the log.  The kernel is suddenly aggressively reclaiming up whatever process memory it can get (see driver source at  http://www.google.com/codesearch#KMCRKdMbI4g/drivers/misc/lowmemorykiller.c&q=lowmem_shrink&type=cs). Why?


Immediately preceding the mass process cull are the following lines:

  1. <6>[  494.389448] TIWLAN:[masked]: mlmeParser              , ERROR:mlmeParser_recv: Error in parsing Probe response packet
  2. <6>[  494.395612] TIWLAN:[masked]: mlmeParser              , ERROR:mlmeParser_recv: Error in parsing Probe response packet
  3. <6>[  494.422193] TIWLAN:[masked]: mlmeParser              , ERROR:mlmeParser_recv: Error in parsing Probe response packet

So the TIWLAN driver is processing something unexpected, right beforehand. If it's fed garbage data, did this driver maybe screw up a memory-needed calculation which it then passed into kmalloc()?

Looking further back in the log one sees a faintly alarming warning from this same TIWLAN driver:

 TIWLAN:[masked]: WARNING!!!: Firwmare and Driver Version don't match: FW=4

I.e. the code baked into your wifi chip is not what your driver is expecting to drive. This could be harmless, but it's the sort of error more normally associated with bricked hardware. I'd be very suspicious about this part of the system if it were me. 



On Fri, Dec 23, 2011 at 9:25 AM, Richard Hyndman <[address removed]> wrote:
Reproducible steps would be interesting. If the logs were generated after the reboot then usually there isn't much useful in there. Either way I've had a look through and can't see anything that stands out. Does the phone freeze at all before rebooting? anything consistent about the experience at all?

On Thu, Dec 22, 2011 at 3:33 PM, Nilesh <[address removed]> wrote:
Hi Terence,

Do you mean the device randomly reboots, as opposed to the app actually restarting.

I've come across a similar situation with the Motorola Atrix and the Bionic. I think it's something to do with Motorola's gingerbread build for some of their devices.

I would suggest reaching out to one of the Android developer advocates, to see if you can demonstrate the problem to them, especially if you have reproducible steps.

Good luck!
Nilesh.


On 19 December[masked]:06, Terence Eden <[address removed]> wrote:
Bit of an odd request this.
I'm testing the Motorola Pro Plus - and the device has a nasty habit
of restarting during testing.  Not FC, an actual restart. It's not
limited to running any particular app that I can see.

I've got the panic logs off the device, but they don't mean much to
me. Any of you fine people able to decypher what's going on?  I've
stuck the most recent crash log up at http://pastebin.com/VmVnfxYM

Are there any tools for seeing what's going on?  DDMS shows nothing
untoward up until the device crashes and restarts.

Thanks

Terence




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