[MCAST]: Fix filter leak on device removal.
This fixes source filter leakage when a device is removed and a
process leaves the group thereafter.
This also includes corresponding fixes for IPv6 multicast source
filters on device removal.
Signed-off-by: David L Stevens <dlstevens@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 9d697d4..639eb20 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -268,13 +268,14 @@
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 @@
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));