linux-kernel - Re: Documenting ptrace access mode checking

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Message-ID: <20160622215142.GA14751@redhat.com>
Date:	Wed, 22 Jun 2016 23:51:42 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>,
	Jann Horn <jann@...jh.net>, James Morris <jmorris@...ei.org>,
	linux-man <linux-man@...r.kernel.org>,
	Stephen Smalley <sds@...ho.nsa.gov>,
	lkml <linux-kernel@...r.kernel.org>,
	Kees Cook <keescook@...omium.org>,
	linux-security-module <linux-security-module@...r.kernel.org>,
	Linux API <linux-api@...r.kernel.org>
Subject: Re: Documenting ptrace access mode checking

On 06/21, Eric W. Biederman wrote:
>
> Adding Oleg just because he seems to do most of the ptrace related
> maintenance these days.

so I have to admit that I never even tried to actually understand
ptrace_may_access ;)

> We certainly need something that gives a high level view so people
> reading the man page can know what to expect.   If you get down into the
> weeds we run the danger of people beginning to think they can depend
> upon bugs in the implementation.

Personally I agree. I think "man ptrace" shouldn't not tell too much
about kernel internals.

Perhaps Documentation/security/ makes more sense?

Oleg.