bgpd : multiple memory leak fixes in show commands

Issue: bgpd got kill due to out of memory, when show bgp
neighbor json and show ip bgp neighbor <ip> routes json
commands executed multiple times in a setup having 320554
routes.

RCA: Heap allocated for bgpd keeps increasing. This is verified
using top command and show memory command.

Memleak Fix-1: show ip bgp route json command
When dumping a large bit of table data via bgp_show_route
and if there is no information to display for a particular
struct bgp_node *` the data allocated via json_object_new_array()
is not freed. This is resolved now.

Memleak Fix-2:
The function bgp_peer_counts() doesn't free the memory allocated for
json_loop when there is No such neighbor or address family. This is
fixed now.

Signed-off-by: Sarita Patra <saritap@vmware.com>

diff --git a/bgpd/bgp_route.c b/bgpd/bgp_route.c
index c4ab223b7f5956b54904638b2170e50e95f99a57..1d1f3d9b26b186dc901fa006aadba641dd54f2f6 100644 (file)
--- a/bgpd/bgp_route.c
+++ b/bgpd/bgp_route.c
@@ -11262,8 +11262,13 @@ static int bgp_show_route_in_table(struct vty *vty, struct bgp *bgp,
                                           vty,
                                           use_json,
                                           json_paths);
-               if (use_json && display)
-                       json_object_object_add(json, "paths", json_paths);
+               if (use_json) {
+                       if (display)
+                               json_object_object_add(json, "paths",
+                                                      json_paths);
+                       else
+                               json_object_free(json_paths);
+               }
        } else {
                if ((dest = bgp_node_match(rib, &match)) != NULL) {
                        const struct prefix *dest_p = bgp_dest_get_prefix(dest);
@@ -12742,6 +12747,7 @@ static int bgp_peer_counts(struct vty *vty, struct peer *peer, afi_t afi,
                                "No such neighbor or address family");
                        vty_out(vty, "%s\n", json_object_to_json_string(json));
                        json_object_free(json);
+                       json_object_free(json_loop);
                } else
                        vty_out(vty, "%% No such neighbor or address family\n");