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Date: Mon, 10 Jan 2022 14:30:17 +0100
From: Florian Weimer <fweimer@...hat.com>
To: Rich Felker <dalias@...c.org>
Cc: Nihal Jere <nihal@...aljere.xyz>, musl@...ts.openwall.com
Subject: Re: Dynamic linker segfault
* Rich Felker:
> By my understanding, p_align implies an understanding by the creator
> of the program that the load segment may be "over-mapped" (extra file
> contents visible and possibly executable) up to that alignment
> boundary due to page granularity. This isn't really a correctness
> contract but a security/hardening contract for folks who consider
> anti-ROP measures a boundary that should be enforced.
Not sure if I follow. Do you mean p_align is purely for documenting
layout decisions by the link editor? I suspect that the necessary
overlap would be visible by other means, too.
Thanks,
Florian
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