ipv4: take rtnl_lock and mark mrt table as freed on namespace cleanup
authorWANG Cong <xiyou.wangcong@gmail.com>
Tue, 31 Mar 2015 18:01:45 +0000 (11:01 -0700)
committerDavid S. Miller <davem@davemloft.net>
Fri, 3 Apr 2015 00:52:34 +0000 (20:52 -0400)
This is the IPv4 part for commit 905a6f96a1b1
(ipv6: take rtnl_lock and mark mrt6 table as freed on namespace cleanup).

Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/ipmr.c

index 92825443fad6ea0f063fedfaa176761717fb739e..bc40115bc39481de40cd725356742c19f274c884 100644 (file)
@@ -278,10 +278,12 @@ static void __net_exit ipmr_rules_exit(struct net *net)
 {
        struct mr_table *mrt, *next;
 
+       rtnl_lock();
        list_for_each_entry_safe(mrt, next, &net->ipv4.mr_tables, list) {
                list_del(&mrt->list);
                ipmr_free_table(mrt);
        }
+       rtnl_unlock();
        fib_rules_unregister(net->ipv4.mr_rules_ops);
 }
 #else
@@ -308,7 +310,10 @@ static int __net_init ipmr_rules_init(struct net *net)
 
 static void __net_exit ipmr_rules_exit(struct net *net)
 {
+       rtnl_lock();
        ipmr_free_table(net->ipv4.mrt);
+       net->ipv4.mrt = NULL;
+       rtnl_unlock();
 }
 #endif