Merge pull request #16166 from opensourcerouting/fix/backport_627fb271f0a5103141f2eccda53dd2fa08ed0819_9.1

nhrpd: Fix nhrp_peer leak

Author: donaldsharp

nhrpd/nhrp_cache.c

@@ -70,6 +70,8 @@ static void nhrp_cache_free(struct nhrp_cache *c)
 	notifier_call(&c->notifier_list, NOTIFY_CACHE_DELETE);
 	assert(!notifier_active(&c->notifier_list));
 	hash_release(nifp->cache_hash, c);
+	if (c->cur.peer)
+		nhrp_peer_notify_del(c->cur.peer, &c->peer_notifier);
 	nhrp_peer_unref(c->cur.peer);
 	nhrp_peer_unref(c->new.peer);
 	EVENT_OFF(c->t_timeout);

nhrpd/nhrp_peer.c

@@ -45,7 +45,8 @@ static void nhrp_peer_check_delete(struct nhrp_peer *p)
 
 	EVENT_OFF(p->t_fallback);
 	EVENT_OFF(p->t_timer);
-	hash_release(nifp->peer_hash, p);
+	if (nifp->peer_hash)
+		hash_release(nifp->peer_hash, p);
 	nhrp_interface_notify_del(p->ifp, &p->ifp_notifier);
 	nhrp_vc_notify_del(p->vc, &p->vc_notifier);
 	XFREE(MTYPE_NHRP_PEER, p);