[PATCH v3] app/testpmd: fix issue with memory leaks when quit testpmd

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

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

Signed-off-by: Ke Zhang <ke1x.zhang@intel.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 cc8e7aa138..a6fa9be3ef 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -5978,6 +5978,25 @@ 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 fe2ce19f99..1861a02c2f 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -3137,6 +3137,7 @@ close_port(portid_t pid)
 		}
 
 		if (is_proc_primary()) {
+			mcast_addr_pool_destroy(pi);
 			port_flow_flush(pi);
 			port_flex_item_flush(pi);
 			rte_eth_dev_close(pi);
diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
index 31f766c965..daa3c08317 100644
--- a/app/test-pmd/testpmd.h
+++ b/app/test-pmd/testpmd.h
@@ -965,6 +965,7 @@ int port_flow_create(portid_t port_id,
 int port_action_handle_query(portid_t port_id, uint32_t id);
 void update_age_action_context(const struct rte_flow_action *actions,
 		     struct port_flow *pf);
+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_dump(portid_t port_id, bool dump_all,
-- 
2.25.1