drop_monitor: consider inserted data in genlmsg_end

Final nlmsg_len field update must reflect inserted net_dm_drop_point
data.

This patch depends on previous patch:
"drop_monitor: add missing call to genlmsg_end"

Signed-off-by: Reiter Wolfgang <wr0112358@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index f465bad2ef2c..fb55327dcfea 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -102,7 +102,6 @@ static struct sk_buff *reset_per_cpu_data(struct per_cpu_dm_data *data)
         }
         msg = nla_data(nla);
         memset(msg, 0, al);
-        genlmsg_end(skb, msg_header);
         goto out;
 
 err:
@@ -112,6 +111,13 @@ out:
         swap(data->skb, skb);
         spin_unlock_irqrestore(&data->lock, flags);
 
+        if (skb) {
+                struct nlmsghdr *nlh = (struct nlmsghdr *)skb->data;
+                struct genlmsghdr *gnlh = (struct genlmsghdr *)nlmsg_data(nlh);
+
+                genlmsg_end(skb, genlmsg_data(gnlh));
+        }
+
         return skb;
 }