Re: Unable to write files greater than 1GB to udf-filesystem after kernel update (Sarge)

[Omer Canitez <hoschi@canitez.net>]

On Thursday 14 December 2006 12:45, Jan Kara wrote:
>   Hello,
>
> > > beginning with kernel-image-2.6.8-3-k7_2.6.8-16sarge5, I am no longer
> > > able to write files to a DVD-RAM with udf-filesystem which are bigger
> > > than 1G. When copying files greater than the mentioned size to the
> > > DVD-RAM, I get the error message "File size exceeded". Copying smaller
> > > files works.
> > >
> > > This problem also exists after upgrading to the latest kernel-image
> > > 2.6.8-15sarge6.
> > >
> > > When reverting back to the old kernel
> > > (kernel-image-2.6.8-3-k7_2.6.8-16sarge4) or when formatting the medium
> > > with an ext2-filesystem, the problem disappears, so this problem seems
> > > to be related to the udf-filesystem.
> > >
> > > I did a Google search and found a posting with the same problem which
> > > seems to affect Debian Etch testing only:
> > > http://groups.google.com/group/linux.debian.user/browse_thread/thread/1
> > >eab67989a25fe8a/b3c075459da58131?lnk=gst&q=file+size+exceeded+1GB
> > >
> > > I did not find anything related in the Debian Bug-tracker.
> > >
> > > Am I missing a parameter or option to be able to write files greater
> > > than 1GB to an udf-filesystem after upgrading?
> >
> > hey Omer,
> >   Upstream's solution[1] to handle this security problem was to
> > disable extents > 1G in UDF, so that is what we backported for a
> > security update.
> >
> > Does the UDF filesystem only allow 1 extent per file? If not, is it
> > possible to change the patch to actually limit extent sizes instead of
> > the overall size of the file?
>
>   Yes it is possible. It just requires non-trivial work (rewriting
> several places in UDF code). Anyone is welcome to do this. Eric Sandeen
> from RedHat may be working on it (or me if I find time but it won't be
> before Christmas).
>
> 								Honza

Thank you very much. Until a fix is available, I will use strip as workaround 
to circumvent the limitiation.


Best regards
Omer Canitez