fs/unionfs/: Check return value of d_path

Signed-off-by: Josef 'Jeff' Sipek <jsipek@cs.sunysb.edu>

diff --git a/fs/unionfs/super.c b/fs/unionfs/super.c
index 38443c745241e8aebf63432bcaf4e1e70f771014..176cfb666a081a7c8cc7754e7ed557d44228abbb 100644 (file)
--- a/fs/unionfs/super.c
+++ b/fs/unionfs/super.c
@@ -311,6 +311,11 @@ static int unionfs_show_options(struct seq_file *m, struct vfsmount *mnt)
                path = d_path(unionfs_lower_dentry_idx(sb->s_root, bindex),
                           unionfs_lower_mnt_idx(sb->s_root, bindex), tmp_page,
                           PAGE_SIZE);
+               if (IS_ERR(path)) {
+                       ret = PTR_ERR(path);
+                       goto out;
+               }
+
                perms = branchperms(sb, bindex);
 
                seq_printf(m, "%s=%s", path,