[PATCH 4.4 10/27] drop_monitor: consider inserted data in genlmsg_end

[Greg Kroah-Hartman]

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Reiter Wolfgang <wr0112...@gmail.com>


[ Upstream commit 3b48ab2248e61408910e792fe84d6ec466084c1a ]

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 <wr0112...@gmail.com>
Acked-by: Neil Horman <nhor...@tuxdriver.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 net/core/drop_monitor.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -107,7 +107,6 @@ static struct sk_buff *reset_per_cpu_dat
        }
        msg = nla_data(nla);
        memset(msg, 0, al);
-       genlmsg_end(skb, msg_header);
        goto out;
 
 err:
@@ -117,6 +116,13 @@ 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;
 }