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 0ae7f3af27b386fa5a3bc9efee1dab47fa972e9c..d75e7132c8bf37de1cd168764586603ab7fe4a04 100644 (file)
--- a/fs/unionfs/lookup.c
+++ b/fs/unionfs/lookup.c
@@ -395,7 +395,9 @@ 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 */