[riot-notifications] [RIOT-OS/RIOT] gnrc: nodes crashing with too small packet buffer (#5748)

Martine Lenders notifications at github.com
Thu May 23 14:39:42 CEST 2019


> Not sure if this is related: Testing via tap on native, after some successful UDP transmissions, `_gnrc_netif_thread` always gets stuck. DEBUG says:
> 
> ```
> gnrc_netif: waiting for incoming messages
> gnrc_netif: GNRC_NETDEV_MSG_TYPE_EVENT received
> gnrc_netif: event triggered -> 2
> gnrc_netif_ethernet: cannot allocate pktsnip.
> gnrc_netif: waiting for incoming messages
> gnrc_netif: GNRC_NETDEV_MSG_TYPE_EVENT received
> gnrc_netif: event triggered -> 2
> gnrc_netif_ethernet: cannot allocate pktsnip.
> ```
> 
> Increasing `GNRC_PKTBUF_SIZE` increases the number of successful transmissions but sooner or later, the same error will occur.

This hints at a leak in the packet buffer. So it might be interesting which modules you are including and what your scenario it is so we can reproduce it. I don't see the relation to a smaller packet buffer however.

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