net: fix sctp breakage

broken by commit 5e739d1752aca4e8f3e794d431503bfca3162df4; AFAICS should
be -stable fodder as well...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Aced-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 1 deletions

diff --git a/net/sctp/endpointola.c b/net/sctp/endpointola.c
index 4c8d9f45ce09..905fda582b92 100644
--- a/net/sctp/endpointola.c
+++ b/net/sctp/endpointola.c
@@ -111,7 +111,8 @@ static struct sctp_endpoint *sctp_endpoint_init(struct sctp_endpoint *ep,
                 if (sctp_addip_enable) {
                         auth_chunks->chunks[0] = SCTP_CID_ASCONF;
                         auth_chunks->chunks[1] = SCTP_CID_ASCONF_ACK;
-                        auth_chunks->param_hdr.length += htons(2);
+                        auth_chunks->param_hdr.length =
+                                        htons(sizeof(sctp_paramhdr_t) + 2);
                 }
         }