Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753014Ab3GILYp (ORCPT ); Tue, 9 Jul 2013 07:24:45 -0400 Received: from mail-oa0-f48.google.com ([209.85.219.48]:61170 "EHLO mail-oa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751176Ab3GILYn (ORCPT ); Tue, 9 Jul 2013 07:24:43 -0400 MIME-Version: 1.0 In-Reply-To: References: Date: Tue, 9 Jul 2013 07:24:42 -0400 Message-ID: Subject: Re: sending SEGV to qemu crashes host kernel in Fedora 19 From: Josh Boyer To: Dave Airlie Cc: qemu-devel@nongnu.org, LKML Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1473 Lines: 39 On Mon, Jul 8, 2013 at 9:11 PM, Dave Airlie wrote: > On Tue, Jul 9, 2013 at 10:35 AM, Dave Airlie wrote: >> Hi, >> >> F19 >> kernel-3.9.8-300.fc19.x86_64 >> qemu-kvm-1.4.2-4.fc19.x86_64 >> >> If I start a complete F19 install in the guest and send the qemu >> process a SEGV signal, the host kernel starts giving me random kmalloc >> errors soon after, if I send a normal kill signal things seem fine. >> >> CPU is Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz, on a HP 220z workstation. >> >> I initially blamed bad RAM but this reproduces everytime, and I >> swapped DIMMs around >> >> I haven't tested with upstream kernel/qemu yet, but I wondered if >> anyone else has seen this. >> >> I noticed this because some work I was doing was segfaulting my qemu >> and then my machine would die a few mins later. > > Of course now I read my fedora kernel emails and notice vhost_net does > bad things, > > disabling vhost_net seems to make it work fine, hopefully the next > Fedora kernel will bring the magic fixes. We hope so too. 3.9.9-302.fc19 in koji should contain the fixes we know about. There's still another bug open that's tracking issues with Windows guest VMs and vhost-net. josh -- 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/