ospfd: ospf_if_free can leave dangling references on ISM events - cancel them

* ospf_interface.c: (ospf_if_free) events with dangling pointers left
  scheduled can be seriously bad for ospfd's health. Cancel the event.

diff --git a/ospfd/ospf_interface.c b/ospfd/ospf_interface.c
index afe3acf133e817636c9e40769fcec32421995924..f9dc4b09c995eb8ab8e0e22d235b30d2cfa318ed 100644 (file)
--- a/ospfd/ospf_interface.c
+++ b/ospfd/ospf_interface.c
@@ -335,6 +335,8 @@ ospf_if_free (struct ospf_interface *oi)
   listnode_delete (oi->ospf->oiflist, oi);
   listnode_delete (oi->area->oiflist, oi);
 
+  thread_cancel_event (master, oi);
+
   memset (oi, 0, sizeof (*oi));
   XFREE (MTYPE_OSPF_IF, oi);
 }