Weird problem with RHEL5 isofs driver when using mkisofs -x --exclude options

[Giulio Orsero <giulioo@gmail.com>]

This is very likely a CENTOS5 (RHEL5) isofs driver issue, but since it's
very weird I thought to ask here whether someone can reproduce it just to be
sure this is not a misconfiguration/error on my part.

Problem: dirs on which an mkisofs exclusion is made show with wrong
permissions/timestamp when isofs driver load the iso image.

Steps to reproduce (I did this as root just to be sure):

# uname -r
2.6.18-92.1.6.el5
# mkisofs -version    
mkisofs 2.01 (cpu-pc-linux-gnu)
(I tried stock 2.01.01a42 with no change)

===== script =====
#!/bin/sh
umask 022
rm -rf ./isotest
mkdir -p ./isotest/dir1 ./isotest/dir2 ./loop_mount
touch -t 200801010000 ./isotest/dir1 ./isotest/dir2
mkisofs -R -o test.iso -x 'isotest/dir1/*' isotest
isoinfo -lR -i test.iso
sudo mount -o loop test.iso ./loop_mount
ls -l loop_mount
sudo umount ./loop_mount
==========

What I get:
INFO:   UTF-8 character encoding detected by locale settings.
        Assuming UTF-8 encoded filenames on source filesystem,
        use -input-charset to override.
Unknown file type (unallocated) isotest/.. - ignoring and continuing.
Total translation table size: 0
Total rockridge attributes bytes: 589
Total directory bytes: 4562
Path table size(bytes): 34
Max brk space used 0
177 extents written (0 MB)
 
Directory listing of /
drwxr-xr-x   4    0    0            2048 Jul  8 2008 [     23 02]  .
?---------   0    0    0            2048 Jul  8 2008 [     23 02]  ..
drwxr-xr-x   2    0    0            2048 Jan  1 2008 [     24 02]  dir1
drwxr-xr-x   2    0    0            2048 Jan  1 2008 [     25 02]  dir2
 
Directory listing of /dir1/
dr-xr-xr-x   2    0    0            2048 Jul  8 2008 [     24 02]  .
?---------   4    0    0            2048 Jul  8 2008 [     24 02]  ..
 
Directory listing of /dir2/
drwxr-xr-x   2    0    0            2048 Jan  1 2008 [     25 02]  .
drwxr-xr-x   4    0    0            2048 Jul  8 2008 [     23 02]  ..
total 4
dr-xr-xr-x 2 root root 2048 Jul  8 20:39 dir1      <==== WRONG PERMS/TIME
drwxr-xr-x 2 root root 2048 Jan  1  2008 dir2


What I'd expect:
That "dir1" would show with proper permissions and timestamp, just like
"dir2"

Note:
- isoinfo shows correct info
- If I mount the very same iso image on a system with stock 2.4.33 kernel
and isofs driver, the info is correct.
- I tried using mkisofs 2.01.01a42, no change.

However, I'd expect that the mkisofs exclusion would have no effect on final
image since dir1 is empty, but evidently this is not the case.

Thanks
-- 
giulioo@pobox.com