RE: [PATCH v2] app/testpmd: fix issue with memory leaks when quit testpmd

["Zhang, Yuying" <yuying.zhang@intel.com>]

Hi Ke,

-----Original Message-----
From: Zhang, Ke1X <ke1x.zhang@intel.com> 
Sent: 2022年3月14日 13:47
To: Li, Xiaoyun <xiaoyun.li@intel.com>; Singh, Aman Deep <aman.deep.singh@intel.com>; Zhang, Yuying <yuying.zhang@intel.com>; dev@dpdk.org
Cc: Zhang, Ke1X <ke1x.zhang@intel.com>
Subject: [PATCH v2] app/testpmd: fix issue with memory leaks when quit testpmd

when dpdk is compiled in ASan, there is a memory leaks after quit testpmd if set mcast_addr, this patch fix this issue.

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/testpmd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index fe2ce19f99..f7e18aee25 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -3136,6 +3136,12 @@ close_port(portid_t pid)
 			continue;
 		}
 
+		if (port->mc_addr_nb != 0) {
+			/* free the pool of multicast addresses. */
+			free(port->mc_addr_pool);
+			port->mc_addr_pool = NULL;
+		}
+
Is port->mc_addr_pool located in shared memory and may it be freed in primary process?
BTW,  you can write a function in config.c such as mcast_addr_pool_extend() and reference in close_port().
 		if (is_proc_primary()) {
 			port_flow_flush(pi);
 			port_flex_item_flush(pi);
--
2.25.1