From: Vlad Yasevich <vladislav.yasevich@hp.com>
Date: Tue, 12 Apr 2011 15:20:48 +0000 (+0000)
Subject: sctp: fix oops when updating retransmit path with DEBUG on
X-Git-Tag: firefly_0821_release~7613^2~1428^2~81
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=25f7bf7d0dfb460505cbe42676340e33100aca2e;p=firefly-linux-kernel-4.4.55.git

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>
---

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: ",