Oops, this lookup_one_len needs the i_sem.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
 
        dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
 
+       down(&rec_dir.dentry->d_inode->i_sem);
        dentry = lookup_one_len(name, rec_dir.dentry, namlen);
+       up(&rec_dir.dentry->d_inode->i_sem);
        if (IS_ERR(dentry)) {
                status = PTR_ERR(dentry);
                return status;