zebra/ospf/ospf6: Fix several memory leaks on if up/down

Resolved several memory leaks caused by ifdown/ifup the vrf device or
a swp port.  For bgp/zebra/ospf/ospf6, bouncing the vrf device would cause
a linked list, Interface, and route-table to get leaked.  For ospf6,
bouncing the swp device also caused leaks of Connected and Prefix entries.

Ticket: CM-10841
Signed-off-by: Don Slice
Reviewed-By: Donald Sharp
Testing Done: Manual testing, bgp and ospf mins passed, smokes had fewer failures than base

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/if.c b/lib/if.c
index 97edf1769..8f1461326 100644
--- a/lib/if.c
+++ b/lib/if.c
@@ -1292,6 +1292,12 @@ if_terminate (struct list **intf_list)
       if (ifp == NULL)
 	break;
 
+      if (ifp->node)
+        {
+          ifp->node->info = NULL;
+          route_unlock_node (ifp->node);
+        }
+
       if_delete (ifp);
     }