[dpdk-stable] [PATCH] eventdev/eth_tx: fix queue_del function

[Naga Harish K S V <s.v.naga.harish.k@intel.com>]

This patch fixes heap-use-after-free reported by ASAN,
please reference https://bugs.dpdk.org/show_bug.cgi?id=869

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>
---
 lib/eventdev/rte_event_eth_tx_adapter.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/eventdev/rte_event_eth_tx_adapter.c b/lib/eventdev/rte_event_eth_tx_adapter.c
index da55d2c2dc..c17f33f098 100644
--- 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;
 
-- 
2.25.1