From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753154AbcEaKgK (ORCPT ); Tue, 31 May 2016 06:36:10 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50714 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751825AbcEaKgG (ORCPT ); Tue, 31 May 2016 06:36:06 -0400 Subject: Re: kvm: GPF in kvm_lapic_latched_init To: Dmitry Vyukov , Gleb Natapov , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "x86@kernel.org" , kvm@vger.kernel.org, LKML References: Cc: syzkaller , Kostya Serebryany , Alexander Potapenko , Eric Dumazet , Sasha Levin From: Paolo Bonzini Message-ID: Date: Tue, 31 May 2016 12:35:59 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.1.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.30]); Tue, 31 May 2016 10:36:05 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/01/2016 19:42, Dmitry Vyukov wrote: > Hello, > > The following program triggers GPF in kvm_lapic_latched_init if run in > a parallel loop: > https://gist.githubusercontent.com/dvyukov/524b398f379440b21115/raw/9627095f57a72501fb51bf7565471d31732beeee/gistfile1.txt I've noticed that the program here tends to segfault a lot, even before reaching the kernel. Is this intended? Thanks, Paolo