Re: [PATCH 12/18] shared mount handling: bind and rbind

From: Miklos Szeredi
Date: Wed Nov 16 2005 - 11:36:57 EST

> > > Shouldn't chroot jail you?
> >
> > No, chroot should just change the root.
> >
> > If you don't want to be able to get back the old root, just close all
> > file descriptors _in addition_ to chroot() and chdir().
> hah. As long as you're running as root, chroot() again to a directory
> below you, and you effectively broken the chroot and can make a relative
> path to the old root. :)

... AND do 'setuid(nonroot)'. Root can get out of a chroot() jail in
much more interesting ways.

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