From fc51dcfff9892478b026aeb234115146d7301b59 Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Mon, 2 Jun 2008 10:18:00 -0700
Subject: [PATCH] Don't oops on deldp, by avoiding use-after-free on
 net_bridge_port.

---
 datapath/datapath.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/datapath/datapath.c b/datapath/datapath.c
index adc69806..ed9c557c 100644
--- a/datapath/datapath.c
+++ b/datapath/datapath.c
@@ -406,12 +406,12 @@ static int del_switch_port(struct net_bridge_port *p)
 /* Called with dp_mutex. */
 static void del_dp(struct datapath *dp)
 {
-	struct net_bridge_port *p;
+	struct net_bridge_port *p, *n;
 
 	kthread_stop(dp->dp_task);
 
 	/* Drop references to DP. */
-	list_for_each_entry_rcu (p, &dp->port_list, node)
+	list_for_each_entry_safe (p, n, &dp->port_list, node)
 		del_switch_port(p);
 	rcu_assign_pointer(dps[dp->dp_idx], NULL);
 
-- 
2.30.2