mds/MDCache.cc: fix dereference null return value

Add assert to fix:

CID 716994 (#1 of 1): Dereference null return value (NULL_RETURNS)
  dereference: Dereferencing a pointer that might be null "dir" when
  calling "CDir::mark_dirty(version_t, LogSegment *)".

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index 330e69507d96c9e522526a026314f36248df0bdc..8c17172e5c48ad8846cab505118f825970ee8dff 100644 (file)
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -496,6 +496,7 @@ void MDCache::_create_system_file_finish(Mutation *mut, CDentry *dn, version_t d
   CDir *dir = 0;
   if (in->inode.is_dir()) {
     dir = in->get_dirfrag(frag_t());
+    assert(dir);
     dir->mark_dirty(1, mut->ls);
     dir->mark_new(mut->ls);
   }