linux-kernel - Re: [RFC][PATCH] Lock down kprobes

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Message-Id: <20171108163148.GA8882@in.ibm.com>
Date:   Wed, 8 Nov 2017 22:01:48 +0530
From:   Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>
To:     David Howells <dhowells@...hat.com>
Cc:     Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] Lock down kprobes

On Wed, Nov 08, 2017 at 04:21:33PM +0000, David Howells wrote:
> Hi,
> 
> I need to lock down kprobes under secure boot conditions as part of the patch
> series that can be found here:
> 
> 	https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git/log/?h=efi-lock-down
> 
> Can you tell me that if the attached patch is sufficient to the cause?

This will not prevent the raw kprobe events from working. If your
intention is to prevent *any* kprobe registration, the best place to do
that is in register_kprobe() in kernel/probes.c

Ananth