linux-kernel - Re: [PATCH 1/5] proc: make /proc/*/cmdline go through LSM

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Message-Id: <20180419170217.0418b519a269003fd950a291@linux-foundation.org>
Date:   Thu, 19 Apr 2018 17:02:17 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] proc: make /proc/*/cmdline go through LSM

On Wed, 21 Feb 2018 22:23:39 +0300 Alexey Dobriyan <adobriyan@...il.com> wrote:

> /proc/*/cmdline is not different from /proc/*/environ as it accesses
> target task's memory (and can access the very same region of memory)
> but it doesn't go through ptrace_may_access() and thus doesn't go through LSM.

This change can cause existing code to break, no?

I'd like to see, in the changelog, a full explanation of why this won't
break any existing setup?