[dpdk-dev] [Bug 278] bond_ethdev_rx_burst multithread access bond's different queue will crash

bugzilla at dpdk.org bugzilla at dpdk.org
Wed May 15 08:18:30 CEST 2019


https://bugs.dpdk.org/show_bug.cgi?id=278

            Bug ID: 278
           Summary: bond_ethdev_rx_burst multithread access bond's
                    different queue will crash
           Product: DPDK
           Version: 18.11
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev at dpdk.org
          Reporter: wavespider at sina.com
  Target Milestone: ---

when multi-thread access net-bonding interface's different queue, calling
function 
 below will result in crash because of "out of array boundary":
rte_eth_rx_burst
  -> bond_ethdev_rx_burst

one thread loop over and update internals->active_slave:
if (++internals->active_slave >= slave_count) 
        internals->active_slave = 0;
another thread just read internals->active_slave, maybe equal slave_count:

active_slave = internals->active_slave;
num_rx_slave =
        rte_eth_rx_burst(internals->active_slaves[active_slave], /*Here out of
boundary*/
                 bd_rx_q->queue_id,
                 bufs + num_rx_total, nb_pkts);

default, internals->active_slaves[active_slave] maybe the value is 0, then call
rte_eth_rx_burst function:

port-id == 0 and queue_id = 20 (example):
when port-id == 0's interface have not enough queue-number(<20), then will
result in crash ( dev->data->rx_queues[queue_id] == NULL pointer access ).

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