From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 6FA707D087 for ; Thu, 11 Oct 2018 17:01:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730572AbeJLA36 (ORCPT ); Thu, 11 Oct 2018 20:29:58 -0400 Received: from mga11.intel.com ([192.55.52.93]:36745 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725984AbeJLA36 (ORCPT ); Thu, 11 Oct 2018 20:29:58 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Oct 2018 10:01:52 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,369,1534834800"; d="scan'208";a="80687194" Received: from smile.fi.intel.com (HELO smile) ([10.237.72.86]) by orsmga008.jf.intel.com with ESMTP; 11 Oct 2018 10:01:49 -0700 Received: from andy by smile with local (Exim 4.91) (envelope-from ) id 1gAeLM-0004iL-Ip; Thu, 11 Oct 2018 20:01:48 +0300 Date: Thu, 11 Oct 2018 20:01:48 +0300 From: Andy Shevchenko To: Geert Uytterhoeven Cc: Petr Mladek , "Tobin C . Harding" , Andrew Morton , Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 0/3] lib/vsprintf: Hash remaining raw addresses Message-ID: <20181011170148.GM15943@smile.fi.intel.com> References: <20181011084249.4520-1-geert+renesas@glider.be> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20181011084249.4520-1-geert+renesas@glider.be> Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Thu, Oct 11, 2018 at 10:42:46AM +0200, Geert Uytterhoeven wrote: > Hi all, > > There are still two format specifiers that print unhanced kernel > addresses, potentially leaking sensitive information regarding the > kernel layout in memory. > > This patch series fixes this by printing hashed addresses instead. Looks nice! Reviewed-by: Andy Shevchenko > > Changes compared to v1: > - Get rid of the forward declaration for ptr_to_id(), > - Add Reviewed-by. > > Thanks! > > Geert Uytterhoeven (3): > lib/vsprintf: Prepare for more general use of ptr_to_id() > lib/vsprintf: Hash legacy clock addresses > lib/vsprintf: Hash printed address for netdev bits fallback > > Documentation/core-api/printk-formats.rst | 5 +- > lib/vsprintf.c | 216 +++++++++++----------- > 2 files changed, 110 insertions(+), 111 deletions(-) > > -- > 2.17.1 > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds -- With Best Regards, Andy Shevchenko