Re: Chroot bug

From: David Newall
Date: Wed Sep 26 2007 - 07:07:08 EST

Alan Cox wrote:
The dot-dot entry in the root directory is interpreted to mean the root directory itself. Thus, dot-dot cannot be used to access files outside the subtree rooted at the root directory.

Which is behaviour chroot preserves properly.

And yet it is the dot-dot entry which is used to access files outside the root.

The specification says explicitly

"The process working directory is unaffected by chroot()."

Do you believe that when those words were first written, the hidden conflict, namely that it permits dot-dot to access files outside the subtree, was understood? They would have said so if that were the case.
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