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SubjectRe: Chroot bug
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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