[MCAST]: Fix filter leak on device removal.

[linux-2.6] / net / ipv6 / mcast.c

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 9d697d4dcffccde33651b99a5e9b7fe9b37ddf48..639eb20c9f1fd08181c104593f3f39bc8bad3e0d 100644 (file)
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -268,13 +268,14 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, struct in6_addr *addr)
                        if ((dev = dev_get_by_index(mc_lst->ifindex)) != NULL) {
                                struct inet6_dev *idev = in6_dev_get(dev);
 
+                               (void) ip6_mc_leave_src(sk, mc_lst, idev);
                                if (idev) {
-                                       (void) ip6_mc_leave_src(sk,mc_lst,idev);
                                        __ipv6_dev_mc_dec(idev, &mc_lst->addr);
                                        in6_dev_put(idev);
                                }
                                dev_put(dev);
-                       }
+                       } else
+                               (void) ip6_mc_leave_src(sk, mc_lst, NULL);
                        sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
                        return 0;
                }
@@ -334,13 +335,14 @@ void ipv6_sock_mc_close(struct sock *sk)
                if (dev) {
                        struct inet6_dev *idev = in6_dev_get(dev);
 
+                       (void) ip6_mc_leave_src(sk, mc_lst, idev);
                        if (idev) {
-                               (void) ip6_mc_leave_src(sk, mc_lst, idev);
                                __ipv6_dev_mc_dec(idev, &mc_lst->addr);
                                in6_dev_put(idev);
                        }
                        dev_put(dev);
-               }
+               } else
+                       (void) ip6_mc_leave_src(sk, mc_lst, NULL);
 
                sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));