[Tinyos Core WG] cc2420 radio stack, and short packets

[David Gay]

I got a deputy failure from a long running base station (on a micaz):
upper bound coercion:
/home/owl/motes/2.x/tos/chips/cc2420/receive/CC2420ReceiveP.nc:338:
Assertion failed in CLeq:
  CC2420ReceiveP$m_p_rx_buf->data + (unsigned char )((unsigned int )length -
13U) <= CC2420ReceiveP$m_p_rx_buf->data + 28

As far as I can tell, the logic in that file should prevent too-long packets
ever getting there, so my question is: is it conceivable that "too short"
(less than 14 bytes) packets could show up, and cause underflow in the
subtraction? I don't see anything which would prevent such packets getting
as far as receiveDone_task, which contains the subtraction.

David
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