From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8ACFC7618B for ; Mon, 29 Jul 2019 14:51:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7B381206E0 for ; Mon, 29 Jul 2019 14:51:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728446AbfG2Ova (ORCPT ); Mon, 29 Jul 2019 10:51:30 -0400 Received: from mga04.intel.com ([192.55.52.120]:48143 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727318AbfG2Ova (ORCPT ); Mon, 29 Jul 2019 10:51:30 -0400 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga104.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jul 2019 07:51:29 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,323,1559545200"; d="scan'208";a="371086756" Received: from sjchrist-coffee.jf.intel.com (HELO linux.intel.com) ([10.54.74.41]) by fmsmga006.fm.intel.com with ESMTP; 29 Jul 2019 07:51:29 -0700 Date: Mon, 29 Jul 2019 07:51:29 -0700 From: Sean Christopherson To: Thomas Gleixner Cc: LKML , x86@kernel.org, Andy Lutomirski , Vincenzo Frascino , Kees Cook , Paul Bolle , Will Deacon Subject: Re: [patch 4/5] x86/vdso/32: Use 32bit syscall fallback Message-ID: <20190729145128.GB21120@linux.intel.com> References: <20190728131251.622415456@linutronix.de> <20190728131648.879156507@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190728131648.879156507@linutronix.de> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Jul 28, 2019 at 03:12:55PM +0200, Thomas Gleixner wrote: > The generic VDSO implementation uses the Y2038 safe clock_gettime64() and > clock_getres_time64() syscalls as fallback for 32bit VDSO. This breaks > seccomp setups because these syscalls might be not (yet) allowed. > > Implement the 32bit variants which use the legacy syscalls and select the > variant in the core library. > > The 64bit time variants are not removed because they are required for the > time64 based vdso accessors. > > Reported-by: Sean Christopherson > Reported-by: Paul Bolle > Suggested-by: Andy Lutomirski > Fixes: 7ac870747988 ("x86/vdso: Switch to generic vDSO implementation") > Signed-off-by: Thomas Gleixner > --- Reviewed-and-tested-by: Sean Christopherson