From 7df6a8bdb4abe4ac41c6d1a9043b69cbaea23bcc Mon Sep 17 00:00:00 2001
From: Ben Pfaff <blp@nicira.com>
Date: Fri, 13 May 2011 16:50:20 -0700
Subject: [PATCH 1/1] ofproto-dpif: Fix null pointer dereference in
 get_ofp_port().

---
 ofproto/ofproto-dpif.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index 93acd429..b7194930 100644
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -1353,7 +1353,8 @@ is_mirror_output_bundle(struct ofproto *ofproto_, void *aux)
 static struct ofport_dpif *
 get_ofp_port(struct ofproto_dpif *ofproto, uint16_t ofp_port)
 {
-    return ofport_dpif_cast(ofproto_get_port(&ofproto->up, ofp_port));
+    struct ofport *ofport = ofproto_get_port(&ofproto->up, ofp_port);
+    return ofport ? ofport_dpif_cast(ofport) : NULL;
 }
 
 static struct ofport_dpif *
-- 
2.30.2