[Bug-tar] Bug Report: tar 1.15.1: option --listed-incremental does not store symbolic links pointing outside the filsystem

[Jorge Rodriguez]

Hello,

I think I found a severe bug in the tar program. Is this the way to 
report the bug?

The bug is very easy to reproduce, see the small documentation. My tests 
showed that it happens only with large Filesystems of about 60 GB, 
smaller filsystems do well.

With kind regards

Jorge Rodriguez

### Bug Report
### tar --listed-incremental does not store symbolic links pointing outside the 
filsystem
#
### This is the directoty which was backed up
### it has several symbolic links pointing outside the filesystem
#
#   total 13
#   drwxr-xr-x   7 root root    480 Jun 17 14:58 .
#   drwxr-xr-x  36 root root    880 Jun 17 14:56 ..
#   drwxr-xr-x   5 win  users   200 Jun 17 14:59 familie
#   lrwxrwxrwx   1 root root      7 Jun 17 14:59 mbin -> sw/mbin
#   drwxr-xr-x  31 win  users 12680 Jun 17 14:59 midi
#   lrwxrwxrwx   1 root root      7 Jun 17 14:59 mp3 -> /mm/mp3
#   lrwxrwxrwx   1 root root     11 Jun 17 14:59 mp3_all -> /mm/mp3_all
#   lrwxrwxrwx   1 root root     15 Jun 17 14:59 mp3_deutsch -> /mm/mp3_deutsch
#   lrwxrwxrwx   1 root root     17 Jun 17 14:59 mp3_sonstiges -> 
/mm/mp3_sonstiges
#   lrwxrwxrwx   1 root root     16 Jun 17 14:59 mp3_unsorted -> 
/mm/mp3_unsorted
#   lrwxrwxrwx   1 root root     14 Jun 17 14:59 mp3_videos -> /mm/mp3_videos
#   lrwxrwxrwx   1 root root     12 Jun 17 14:59 pcbackup -> /nb/pcbackup
#   drwxr-xr-x   3 win  users   200 Jun 17 14:59 system
#   lrwxrwxrwx   1 root root      8 Jun 17 14:59 tools -> sw/tools
#   lrwxrwxrwx   1 root root      7 Jun 17 14:59 vcd -> /nb/vcd
#   lrwxrwxrwx   1 root root     10 Jun 17 14:59 videos -> /mm/videos
#   lrwxrwxrwx   1 root root     16 Jun 17 14:59 videos_sonst -> 
/mm/videos_sonst
#
#
### This is the directory restored
### All the links pointig outside the filsystems are broken
### links pointing into the filesystem are ok
#
#   total 41
#   drwxr-xr-x   23 root root    960 Jun 17 15:38 .
#   drwxr-xr-x   36 root root    880 Jun 17 14:56 ..
#   drwxr-xr-x    5 win  users   200 Jun 17 15:38 familie
#   lrwxrwxrwx    1 root root      7 Jun 17 15:38 mbin -> sw/mbin
#   drwxr-xr-x   31 win  users   832 Jun 13  2003 midi
#   ----------    1 root root      0 Jun 17 15:38 mp3
#   ----------    1 root root      0 Jun 17 15:38 mp3_all
#   ----------    1 root root      0 Jun 17 15:38 mp3_deutsch
#   ----------    1 root root      0 Jun 17 15:38 mp3_sonstiges
#   ----------    1 root root      0 Jun 17 15:38 mp3_unsorted
#   ----------    1 root root      0 Jun 17 15:38 mp3_videos
#   ----------    1 root root      0 Jun 17 15:38 pcbackup
#   drwxr-xr-x    3 win  users    72 Jan 14 09:38 system
#   lrwxrwxrwx    1 root root      8 Jun 17 15:38 tools -> sw/tools
#   ----------    1 root root      0 Jun 17 15:38 vcd
#   ----------    1 root root      0 Jun 17 15:38 videos
#   ----------    1 root root      0 Jun 17 15:38 videos_sonst


### this is the backup script:
#
### Save the filsystem
rm -f /voll/u.0.tar /voll/u.0.snap
cd /u
tar -cf /voll/u.0.tar -g /voll/u.0.snap .

### Read the backup
cd /new_u 
tar -xf /voll/u.0.tar

:w