[Karmic] file corruption on ext3 filesystem?

[Tetsuo Handa]

Tetsuo Handa wrote:
> I'm experiencing file corruption problem.
> I don't know whether this is a bug of kernel or not.
It turned out that this was because Karmic mounts ext3 filesystem with
data=writeback mode.

CONFIG_EXT3_DEFAULTS_TO_ORDERED says

  The use of "data=writeback" can cause
  unwritten data to appear in files after an system crash or
  power failure, which can be a security issue.

and I think that "unprivileged user can steal the content of deleted files
(e.g. /etc/shadow deleted by /usr/bin/passwd) when power failure occurred"
is a security problem.

http://valhenson.livejournal.com/37921.html

Thanks.