af_netlink: drop_monitor/dropwatch friendly
Need to consume_skb() instead of kfree_skb() in netlink_dump() and
netlink_unicast_kernel() to avoid false dropwatch positives.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 85d27f9..b3025a6 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -154,6 +154,12 @@
kfree(cb);
}
+static void netlink_consume_callback(struct netlink_callback *cb)
+{
+ consume_skb(cb->skb);
+ kfree(cb);
+}
+
static void netlink_sock_destruct(struct sock *sk)
{
struct netlink_sock *nlk = nlk_sk(sk);
@@ -902,8 +908,10 @@
ret = skb->len;
skb_set_owner_r(skb, sk);
nlk->netlink_rcv(skb);
+ consume_skb(skb);
+ } else {
+ kfree_skb(skb);
}
- kfree_skb(skb);
sock_put(sk);
return ret;
}
@@ -1728,7 +1736,7 @@
nlk->cb = NULL;
mutex_unlock(nlk->cb_mutex);
- netlink_destroy_callback(cb);
+ netlink_consume_callback(cb);
return 0;
errout_skb: