[riot-users] Failed assertion after receiving two packets

Martine Lenders mail at martine-lenders.eu
Mon Dec 18 13:16:36 CET 2017


Hi Robert,

2017-12-18 12:46 GMT+01:00 Robert Hartung <hartung at ibr.cs.tu-bs.de>:

> Hi *,
>
> I am transmitting data from various IEEE 802.15.4 nodes. When two
> packets are received close to each other, an assertion fails:
>
> > 2017-12-18 09:05:32,821 - INFO # Contents: 'Hello from  1 (94)'
> > 2017-12-18 09:05:32,836 - INFO # Contents: 'Hello from  4 (526)'
> > 2017-12-18 09:05:32,868 - INFO # sys/net/gnrc/pktbuf_static/gnrc_pktbuf_static.c:230
> => n/a
> > 2017-12-18 09:05:32,868 - INFO # *** RIOT kernel panic:
> > 2017-12-18 09:05:32,886 - INFO # FAILED ASSERTION.
> > 2017-12-18 09:05:32,887 - INFO #
> > 2017-12-18 09:05:32,932 - INFO #      pid | name                 |
> state    Q | pri | stack  ( used) | base addr  | current
> > 2017-12-18 09:05:32,980 - INFO #        1 | idle                 |
> pending  Q |  15 |    768 (   88) |     0x1eb7 |     0x2174
> > 2017-12-18 09:05:33,028 - INFO #        2 | main                 | bl
> mutex _ |   7 |    768 (  246) |     0x21b7 |     0x23c7
> > 2017-12-18 09:05:33,076 - INFO #        3 | at86rf2xx            | bl
> rx    _ |   2 |    512 (  242) |     0x3de3 |     0x3f44
> > 2017-12-18 09:05:33,124 - INFO #        4 | dump_thread          |
> running  Q |   8 |    768 (  766) |     0x1b49 |     0x1dea
> > 2017-12-18 09:05:33,171 - INFO #        5 | send_thread          | bl
> mutex _ |   9 |    768 (  170) |     0x1809 |     0x1a6d
> > 2017-12-18 09:05:33,204 - INFO #          | SUM                  |
>       |     |   3584 ( 1512)
> > 2017-12-18 09:05:33,205 - INFO #
> > 2017-12-18 09:05:33,205 - INFO # *** halted.
> > 2017-12-18 09:05:33,219 - INFO #
>
> The assertion that fails is:
>
> > assert(pkt->users > 0);
>
> The application runs fine when packets are received separately. However,
> if there is more than one packet in the buffer (that's what I suspect
> right now), my application fails. The applications code is attached. Any
> one having an idea why this fails? Is the application correct? Maybe
> some mutex is failing low-level-ish? Maybe threading on my node (based
> on atmega1284p and atmega_common cpu) is corrupted?
>

Regardless of it, can you please open an issue so we can track this?

Thanks and kind regards,
Martine
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