net: fix nlmsg len size for skb when error bit is set.

[sfrench/cifs-2.6.git] / net / netlink / af_netlink.c

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 55180b99562a7bec3788a99906f2c0fd480fbfca..dd85320907cb6f765346f12bd34335825287a743 100644 (file)
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1609,6 +1609,16 @@ int netlink_change_ngroups(struct sock *sk, unsigned int groups)
        return err;
 }
 
+void __netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
+{
+       struct sock *sk;
+       struct hlist_node *node;
+       struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
+
+       sk_for_each_bound(sk, node, &tbl->mc_list)
+               netlink_update_socket_mc(nlk_sk(sk), group, 0);
+}
+
 /**
  * netlink_clear_multicast_users - kick off multicast listeners
  *
@@ -1619,15 +1629,8 @@ int netlink_change_ngroups(struct sock *sk, unsigned int groups)
  */
 void netlink_clear_multicast_users(struct sock *ksk, unsigned int group)
 {
-       struct sock *sk;
-       struct hlist_node *node;
-       struct netlink_table *tbl = &nl_table[ksk->sk_protocol];
-
        netlink_table_grab();
-
-       sk_for_each_bound(sk, node, &tbl->mc_list)
-               netlink_update_socket_mc(nlk_sk(sk), group, 0);
-
+       __netlink_clear_multicast_users(ksk, group);
        netlink_table_ungrab();
 }
 
@@ -1785,7 +1788,7 @@ void netlink_ack(struct sk_buff *in_skb, struct nlmsghdr *nlh, int err)
        }
 
        rep = __nlmsg_put(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
-                         NLMSG_ERROR, sizeof(struct nlmsgerr), 0);
+                         NLMSG_ERROR, payload, 0);
        errmsg = nlmsg_data(rep);
        errmsg->error = err;
        memcpy(&errmsg->msg, nlh, err ? nlh->nlmsg_len : sizeof(*nlh));