From: Ingo Molnar <mingo@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: "Luck, Tony" <tony.luck@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@amacapital.net>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Brian Gerst <brgerst@gmail.com>,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: [RFC] Dump interesting arch/platform info
Date: Wed, 3 Feb 2016 11:48:23 +0100 [thread overview]
Message-ID: <20160203104823.GA21257@gmail.com> (raw)
In-Reply-To: <20160202094147.GA3778@pd.tnic>
* Borislav Petkov <bp@alien8.de> wrote:
> On Mon, Feb 01, 2016 at 11:29:03PM +0000, Luck, Tony wrote:
> > On a high core count, multi-socket, machine I see almost 10K lines
> > of output from this. If you add other things it will become a bit
> > of a jumble to parse.
>
> Always thinking big... :-)
>
> > Perhaps the module name "archinfo" is fine, but each separate thing
> > it shows should get its own file. Starting with:
> >
> > /sys/kernel/debug/x86/gdtinfo
> >
> > for the current output?
>
> Right, or put everything under a directory "archinfo":
>
> /sys/kernel/debug/x86/archinfo/ ... gdt
> ... msrs
>
> ...
>
> and so on.
>
> Yap, sounds better. Thanks!
Agreed. We used to have something like this but then removed it due to various
problems - but the concept itself is fine.
Note that these can be pretty security sensitive pieces of information, and can
also expose ASLR/KASLR details, so the VFS interface needs to be a strictly
root-only thing.
Thanks,
Ingo
next prev parent reply other threads:[~2016-02-03 10:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 11:56 [RFC] Dump interesting arch/platform info Borislav Petkov
2016-02-01 23:29 ` Luck, Tony
2016-02-02 9:41 ` Borislav Petkov
2016-02-03 10:48 ` Ingo Molnar [this message]
2016-02-03 11:00 ` Borislav Petkov
2016-02-04 15:22 ` [PATCH -v2] x86: Add an archinfo dumper module Borislav Petkov
2016-02-04 19:07 ` Luck, Tony
2016-02-07 10:51 ` Borislav Petkov
2016-02-09 19:17 ` Luck, Tony
2016-02-09 19:46 ` Borislav Petkov
2016-02-05 19:51 ` Luck, Tony
2016-02-05 22:24 ` Luck, Tony
2016-02-08 0:01 ` H. Peter Anvin
2016-02-08 7:50 ` Boris Petkov
2016-02-09 12:23 ` Ingo Molnar
2016-02-09 14:01 ` Borislav Petkov
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