[ovs-dev] [PATCH 1/1] ovsdb-idl: memory leak while destroying database

Damjan Skvarc damjan.skvarc at gmail.com
Mon Jul 1 10:24:38 UTC 2019


While checking unit tests with valgrind option (make check-valgrind) I have
noticed
several memory leaks of the following format:
.....
==20019== 13,883 (296 direct, 13,587 indirect) bytes in 1 blocks are
definitely lost in loss record 346 of 346
==20019==    at 0x4C2FB55: calloc (in
/usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==20019==    by 0x530F52: xcalloc (util.c:121)
==20019==    by 0x5037A1: ovsdb_idl_row_create__ (ovsdb-idl.c:3120)
==20019==    by 0x5045A3: ovsdb_idl_row_create (ovsdb-idl.c:3133)
==20019==    by 0x507240: ovsdb_idl_process_update2 (ovsdb-idl.c:2478)
==20019==    by 0x507240: ovsdb_idl_db_parse_update__ (ovsdb-idl.c:2328)
==20019==    by 0x507240: ovsdb_idl_db_parse_update (ovsdb-idl.c:2380)
==20019==    by 0x508128: ovsdb_idl_process_response (ovsdb-idl.c:742)
==20019==    by 0x508128: ovsdb_idl_process_msg (ovsdb-idl.c:831)
==20019==    by 0x508128: ovsdb_idl_run (ovsdb-idl.c:915)
==20019==    by 0x4106D9: bridge_run (bridge.c:2977)
==20019==    by 0x40719C: main (ovs-vswitchd.c:127)
==20019==
==20019== LEAK SUMMARY:
==20019==    definitely lost: 296 bytes in 1 blocks
==20019==    indirectly lost: 13,587 bytes in 10 blocks
==20019==      possibly lost: 0 bytes in 0 blocks
==20019==    still reachable: 43,563 bytes in 440 blocks
==20019==         suppressed: 288 bytes in 1 blocks
....

The problem is that table records maintained by database which is going to
be destroyed
with ovsdb_idl_db_destroy() function are not destroyed.

Signed-off-by: Damijan Skvarc <damjan.skvarc at gmail.com>
---
 lib/ovsdb-idl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/ovsdb-idl.c b/lib/ovsdb-idl.c
index 7545e43..d64d8c0 100644
--- a/lib/ovsdb-idl.c
+++ b/lib/ovsdb-idl.c
@@ -239,6 +239,7 @@ static bool ovsdb_idl_check_server_db(struct ovsdb_idl
*);
 static void ovsdb_idl_send_monitor_request(struct ovsdb_idl *,
                                            struct ovsdb_idl_db *,
                                            enum ovsdb_idl_monitor_method);
+static void ovsdb_idl_db_clear(struct ovsdb_idl_db *db);

 struct ovsdb_idl {
     struct ovsdb_idl_db server;
@@ -581,8 +582,9 @@ ovsdb_idl_destroy(struct ovsdb_idl *idl)
     if (idl) {
         ovsdb_idl_clear(idl);
         jsonrpc_session_close(idl->session);
-
+        ovsdb_idl_db_clear(&idl->server);
         ovsdb_idl_db_destroy(&idl->server);
+        ovsdb_idl_db_clear(&idl->data);
         ovsdb_idl_db_destroy(&idl->data);
         json_destroy(idl->request_id);
         free(idl->remote);
-- 
2.7.4


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