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

Currently, the nlmsg->len field is not set correctly in netlink_ack() for ack messages that include the nlmsg of the error frame. This corrects the length field passed to __nlmsg_put to use the correct payload size. Signed-off-by: John Fastabend <[email protected]> Signed-off-by: Jeff Kirsher <[email protected]> Signed-off-by: David S. Miller <[email protected]>
goeke · Sep 27, 2009 · 5dba93a · 5dba93a
1 parent fc482cc
commit 5dba93a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
@@ -1788,7 +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));