sctp: fix oops when updating retransmit path with DEBUG on

commit fbdf501c9374966a56829ecca3a7f25d2b49a305
  sctp: Do no select unconfirmed transports for retransmissions

Introduced the initial falt.

commit d598b166ced20d9b9281ea3527c0e18405ddb803
  sctp: Make sure we always return valid retransmit path

Solved the problem, but forgot to change the DEBUG statement.
Thus it was still possible to dereference a NULL pointer.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 0 deletions

diff --git a/net/sctp/associola.c b/net/sctp/associola.c
index 0698cad61763..922fdd7eb573 100644
--- a/net/sctp/associola.c
+++ b/net/sctp/associola.c
@@ -1323,6 +1323,8 @@ void sctp_assoc_update_retran_path(struct sctp_association *asoc)
 
         if (t)
                 asoc->peer.retran_path = t;
+        else
+                t = asoc->peer.retran_path;
 
         SCTP_DEBUG_PRINTK_IPADDR("sctp_assoc_update_retran_path:association"
                                  " %p addr: ",