Unionfs: initialize lower mnt in lookup after vfs_path_lookup

Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu>

diff --git a/fs/unionfs/lookup.c b/fs/unionfs/lookup.c
index 0a9602a68eb23ed3b897ec83ab89adb4e50f0b54..a3b42357fa298d6de8307bc85fbacb48fe3b60f7 100644 (file)
--- a/fs/unionfs/lookup.c
+++ b/fs/unionfs/lookup.c
@@ -392,7 +392,9 @@ struct dentry *unionfs_lookup_full(struct dentry *dentry,
                        goto out_free;
                }
                unionfs_set_lower_dentry_idx(dentry, bindex, lower_dentry);
-               BUG_ON(!lower_mnt);
+               if (!lower_mnt)
+                       lower_mnt = unionfs_mntget(dentry->d_sb->s_root,
+                                                  bindex);
                unionfs_set_lower_mnt_idx(dentry, bindex, lower_mnt);
 
                /* adjust dbstart/end */