[natty] Fix aufs calling of security_path_mknod

[John Johansen]

Fix aufs calling of security_path_mknod

BugLink: http://launchpad.net/bugs/724456

The security_path_mknod hook requires an encoded 'dev' for its 'dev' paramet
but aufs is calling security_path_mknod with a 'dev' that was already
converted by 'new_decode_dev(dev)'.  However security_path_mknod and its
consumer TOMOYO is expecting 'dev' rather than 'new_decode_dev(dev)'.
    
This will result in TOMOYO doing new_decode_dev(new_decode_dev(dev))
(which is wrong) when security_path_mknod() is called from aufs' vfsub_mknod
    
Signed-off-by: Tetsuo Handa <penguin-kernel at I-love.SAKURA.ne.jp>
Signed-off-by: John Johansen <john.johansen at canonical.com>

diff --git a/ubuntu/aufs/vfsub.c b/ubuntu/aufs/vfsub.c
index 6ce2fd5..40f6aef 100644
--- a/ubuntu/aufs/vfsub.c
+++ b/ubuntu/aufs/vfsub.c
@@ -276,7 +276,7 @@ int vfsub_mknod(struct inode *dir, struct path *path, int mo
 
        d = path->dentry;
        path->dentry = d->d_parent;
-       err = security_path_mknod(path, d, mode, dev);
+       err = security_path_mknod(path, d, mode, new_encode_dev(dev));
        path->dentry = d;
        if (unlikely(err))
                goto out;