From fbdb0a3a0f83e60a477e1b0092b937de51644837 Mon Sep 17 00:00:00 2001
From: Greg Farnum <gregory.farnum@dreamhost.com>
Date: Thu, 7 Jul 2011 15:28:21 -0700
Subject: [PATCH] mds: check that dnl exists before dereferencing it.

Signed-off-by: Greg Farnum <gregory.farnum@dreamhost.com>
---
 src/mds/MDCache.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index 57439a148da89..eacfab7afa2f7 100644
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -6524,7 +6524,7 @@ int MDCache::path_traverse(MDRequest *mdr, Message *req, Context *fin,     // wh
     }
     
     // can we conclude ENOENT?
-    if (dnl->is_null() && dn->lock.can_read(client)) {
+    if (dnl && dnl->is_null() && dn->lock.can_read(client)) {
       dout(12) << "traverse: miss on null+readable dentry " << path[depth] << " " << *dn << dendl;
       return -ENOENT;
     }
-- 
2.39.5