Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754350AbaDMDBR (ORCPT ); Sat, 12 Apr 2014 23:01:17 -0400 Received: from terminus.zytor.com ([198.137.202.10]:59290 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754100AbaDMDBQ (ORCPT ); Sat, 12 Apr 2014 23:01:16 -0400 User-Agent: K-9 Mail for Android In-Reply-To: References: <53483487.6030103@zytor.com> <53485BB8.1000106@mit.edu> <53485D95.9030301@zytor.com> <1397345179.1772.105823721.224E1140@webmail.messagingengine.com> <5349CCE3.3000003@zytor.com> <1397346568.13490.105824481.72FA2B8D@webmail.messagingengine.com> <5349D44C.9070105@zytor.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: [tip:x86/urgent] x86-64, modify_ldt: Ban 16-bit segments on 64-bit kernels From: "H. Peter Anvin" Date: Sat, 12 Apr 2014 20:00:46 -0700 To: Andy Lutomirski CC: Alexander van Heukelum , Brian Gerst , Ingo Molnar , Linux Kernel Mailing List , Linus Torvalds , Thomas Gleixner , stable@jasper.es Message-ID: <767784e4-73ca-4631-9fbe-16db3e94bbe5@email.android.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I would think any sensible application with 16-bit segments would be using sigaltstack. Does anyone know what Wine does? On April 12, 2014 6:29:11 PM PDT, Andy Lutomirski wrote: >On Sat, Apr 12, 2014 at 6:25 PM, Andy Lutomirski >wrote: >> On Sat, Apr 12, 2014 at 5:03 PM, H. Peter Anvin >wrote: >>> A signal arriving while in the user space trampoline could seriously >>> complicate life. >> >> Agreed. > >Maybe I don't agree. Have signals ever worked sensibly when delivered >to a task running on an unexpected stack or code segment? > >--Andy -- Sent from my mobile phone. Please pardon brevity and lack of formatting. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/