[PATCH 19.11] app/testpmd: fix multicast address pool leak

[Ke Zhang <ke1x.zhang@intel.com>]

[ upstream commit "68629be3a622ee53cd5b40c8447ae9b083ff3f6c" ]

A multicast address pool is allocated for a port when
using mcast_addr testpmd commands.

When closing a port or stopping testpmd, this pool was
not freed, resulting in a leak.
This issue has been caught using ASan.

Free this pool when closing the port.

Error info as following:
ERROR: LeakSanitizer: detected memory leaksDirect leak of
       192 byte(s)
0 0x7f6a2e0aeffe in __interceptor_realloc
        (/lib/x86_64-linux-gnu/libasan.so.5+0x10dffe)
1 0x565361eb340f in mcast_addr_pool_extend
        ../app/test-pmd/config.c:5162
2 0x565361eb3556 in mcast_addr_pool_append
        ../app/test-pmd/config.c:5180
3 0x565361eb3aae in mcast_addr_add
        ../app/test-pmd/config.c:5243

Fixes: 8fff667578a7 ("app/testpmd: new command to add/remove multicast MAC addresses")
Cc: stable@dpdk.org

Signed-off-by: Ke Zhang <ke1x.zhang@intel.com>
Acked-by: Yuying Zhang <yuying.zhang@intel.com>
Acked-by: Ferruh Yigit <ferruh.yigit@xilinx.com>
---
 app/test-pmd/config.c  | 19 +++++++++++++++++++
 app/test-pmd/testpmd.c |  1 +
 app/test-pmd/testpmd.h |  1 +
 3 files changed, 21 insertions(+)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 3eefc90bf..995fd3b38 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -3996,6 +3996,25 @@ mcast_addr_pool_remove(struct rte_port *port, uint32_t addr_idx)
 		sizeof(struct rte_ether_addr) * (port->mc_addr_nb - addr_idx));
 }
 
+int
+mcast_addr_pool_destroy(portid_t port_id)
+{
+	struct rte_port *port;
+
+	if (port_id_is_invalid(port_id, ENABLED_WARN) ||
+	    port_id == (portid_t)RTE_PORT_ALL)
+		return -EINVAL;
+	port = &ports[port_id];
+
+	if (port->mc_addr_nb != 0) {
+		/* free the pool of multicast addresses. */
+		free(port->mc_addr_pool);
+		port->mc_addr_pool = NULL;
+		port->mc_addr_nb = 0;
+	}
+	return 0;
+}
+
 static int
 eth_port_multicast_addr_list_set(portid_t port_id)
 {
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index cb59c85c8..523f48c97 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -2612,6 +2612,7 @@ close_port(portid_t pid)
 
 		if (port->flow_list)
 			port_flow_flush(pi);
+		mcast_addr_pool_destroy(pi);
 		rte_eth_dev_close(pi);
 
 		remove_invalid_ports();
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 244b0c710..ac18bc394 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -733,6 +733,7 @@ int port_flow_create(portid_t port_id,
 		     const struct rte_flow_attr *attr,
 		     const struct rte_flow_item *pattern,
 		     const struct rte_flow_action *actions);
+int mcast_addr_pool_destroy(portid_t port_id);
 int port_flow_destroy(portid_t port_id, uint32_t n, const uint32_t *rule);
 int port_flow_flush(portid_t port_id);
 int port_flow_query(portid_t port_id, uint32_t rule,
-- 
2.25.1