From: Ben Pfaff <blp@nicira.com>
Date: Mon, 2 Jun 2008 17:13:23 +0000 (-0700)
Subject: Avoid wild pointer write in del_switch_port().
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26e5b3af274be63234b6ba72b0f01baeb6a5f905;p=openvswitch

Avoid wild pointer write in del_switch_port().
---

diff --git a/datapath/datapath.c b/datapath/datapath.c
index 4b706499..c87fa241 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -387,7 +387,8 @@ static int del_switch_port(struct net_bridge_port *p)
 	dev_set_promiscuity(p->dev, -1);
 	rtnl_unlock();
 	list_del_rcu(&p->node);
-	rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
+	if (p->port_no != OFPP_LOCAL)
+		rcu_assign_pointer(p->dp->ports[p->port_no], NULL);
 	rcu_assign_pointer(p->dev->br_port, NULL);
 
 	/* Then wait until no one is still using it, and destroy it. */