eventdev/eth_tx: fix queue delete logic

This patch fixes heap-use-after-free reported by ASan.

The application can use the queue_id as `-1` to delete all
the queues of the eth_device that are added to tx_adapter
instance.
In above case, the queue_del API is trying to use number of
queues from adapter level instead of eth_device queues.
When there are queues added from multiple eth devices,
it will result in heap-use-after-free as reported by ASAN.

This patch fixes the queue_del API to use correct number of
queues.

Bugzilla ID: 869
Fixes: a3bbf2e09756 ("eventdev: add eth Tx adapter implementation")
Cc: stable@dpdk.org
Signed-off-by: Naga Harish K S V <s.v.naga.harish.k@intel.com>
Acked-by: Jay Jayatheerthan <jay.jayatheerthan@intel.com>
Tested-by: David Marchand <david.marchand@redhat.com>

diff --git a/lib/eventdev/rte_event_eth_tx_adapter.c b/lib/eventdev/rte_event_eth_tx_adapter.c
index da55d2c2dc3acb3608b66e61832cae6ee3fdfea5..c17f33f09890102e79d54fff31da69a3bebb5a51 100644 (file)
--- a/lib/eventdev/rte_event_eth_tx_adapter.c
+++ b/lib/eventdev/rte_event_eth_tx_adapter.c
@@ -864,7 +864,7 @@ txa_service_queue_del(uint8_t id,
                uint16_t i, q, nb_queues;
                int ret = 0;
 
-               nb_queues = txa->nb_queues;
+               nb_queues = txa->txa_ethdev[port_id].nb_queues;
                if (nb_queues == 0)
                        return 0;