Re: Security patch for /proc
Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 1 Apr 1998 11:16:38 +0100 (BST)
> Alan Cox wrote:
> > mkdir("x");
> > chroot("x");
> > chdir("../../../../../../../..");
> > chroot(".");
>
> Huh? What are you saying here, Alan? /.. == /, regardless of whether
> its the real / or a chroot /.
/ is the point defined by chroot()
.. is the directory above you.
When you mkdir x, chroot x you now have . above / and ../../.. moves
above / to the true root
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