[NETLINK]: Just drop packets for kernel netlink socket with no data_ready handler.

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index 54d88de80e2026b8b9181dbb2ed5c54e9a4dc2dc..8cd678de82eb0a4ae6672543f3f75d9abba2185b 100644 (file)
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -430,6 +430,10 @@ retry:
                goto no_dst;
        nlk = nlk_sk(sk);
 
+       /* Don't bother queuing skb if kernel socket has no input function */
+        if (nlk->pid == 0 && !nlk->data_ready)
+               goto no_dst;
+
 #ifdef NL_EMULATE_DEV
        if (nlk->handler) {
                skb_orphan(skb);