--- /home/linux/views/linux-2.6.12-rc4/fs/open.c	2005-03-02 03:00:01.000000000 -0800
+++ linux-2.6.12-rc4/fs/open.c	2005-05-13 01:30:44.000000000 -0700
@@ -552,6 +552,8 @@
 	dentry = file->f_dentry;
 	mnt = file->f_vfsmnt;
 	inode = dentry->d_inode;
+	if(mnt->mnt_namespace != current->namespace)
+		goto out_putf;
 
 	error = -ENOTDIR;
 	if (!S_ISDIR(inode->i_mode))