Originally Posted by unSpawn
Giving something in a chroot direct access to "Real World" resources is one of the four ways to break out of it. By populating the chroot instead of loop-mounting whole subtrees you'll find stuff Just Works.
Thanks for answer!
In Debian, Arch and Gentoo presented command block works fine. I think, it's a problem of mini linux distros.
May misconfigured kernel chroot setting led to this bug?
PS> last tested on Arch x86 2009.08