--- linux-2.6.7.orig/fs/namei.c	2005-04-01 11:14:26.000000000 +0300
+++ linux-2.6.7/fs/namei.c	2005-04-01 11:23:01.748305104 +0300
@@ -762,6 +762,13 @@ last_component:
 				inode = nd->dentry->d_inode;
 				/* fallthrough */
 			case 1:
+				if (lookup_flags & LOOKUP_DIRECTORY) {
+					err = -ENOTDIR;
+					if (!nd->dentry->d_inode->i_op ||
+					    !nd->dentry->d_inode->i_op->lookup) {
+						goto return_err;
+					}
+				}
 				goto return_reval;
 		}
 		if (nd->dentry->d_op && nd->dentry->d_op->d_hash) {