bug report: reiser4 kernel oops

[Christian K <christian.andi@aon.at>]

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Hello reiser4 team!

First, thanks for this great file system, i use it for all my files and
its really fast!
There is only a little problem using sparse files. When you create a big
sparse file on an reiser4 filesystem (parse file size must be greater
than filesystem size), create an filesystem at this sparse file (doesn't
matter which filesystem), mount the virtual filesystem and copy some
files to it, linux drops an reiser4 kernel oops and hangs when diskspace
is exhausted on the reiser4 filesystem(some sysreq keys keep functional)

I created a small script for reconstructing the problem on your own
system, be aware the system will possibly stop to work using it!
r4script expects 4 parameters:
1: partition where you would like to create the reiser4 filesystem (for
example /dev/sda2)
2: mount directory for reiser4 filesystem (for example /mnt/sda2),
3: mount directory of new reiserfs filesystem (for example /mnt/test)
4: directory containing files which should be copied to new filesystem ,
whole filesize (including all subdirectory files) should be greater than
reiser4 filesystem size. (for example /home)
If we use for example a sparse file on reiserfs filesystem the copy
process aborts only with the error "cp: cannot create regular file
`FILENAME': No space left on device"

Attachment zip contains necessary script files and screen photo showing
kernel oops message and register states.
Hope I could help you, feel free to contact me if you have any questions
or a solution for this problem!

Best regards
Christian



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