linux-kernel - Re: [PATCH 26/30] Lock down ftrace

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Message-ID: <nycvar.YFH.7.76.1711101122190.32604@cbobk.fhfr.pm>
Date:   Fri, 10 Nov 2017 11:23:52 +0100 (CET)
From:   Jiri Kosina <jikos@...nel.org>
To:     David Howells <dhowells@...hat.com>
cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        linux-security-module@...r.kernel.org, gnomes@...rguk.ukuu.org.uk,
        linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org,
        jforbes@...hat.com, Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH 26/30] Lock down ftrace

On Fri, 10 Nov 2017, David Howells wrote:

> That would be fine by me.  I have a patch that locks down kprobes in this
> series.  

Which AFAICS renders locking down ftrace as-is unnecessary ...

> Steven says that ftrace might acquire the ability to dump registers in 
> the future.

... and even if that happens, locking down only that particular feature of 
ftrace would be needed.

Thanks,

-- 
Jiri Kosina
SUSE Labs