Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756866Ab2HGV6p (ORCPT ); Tue, 7 Aug 2012 17:58:45 -0400 Received: from e31.co.us.ibm.com ([32.97.110.149]:35298 "EHLO e31.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755525Ab2HGV6o (ORCPT ); Tue, 7 Aug 2012 17:58:44 -0400 Message-ID: <50218F7E.1060004@linaro.org> Date: Tue, 07 Aug 2012 14:58:22 -0700 From: John Stultz User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0 MIME-Version: 1.0 To: Paul Moore CC: lkml , "Serge E. Hallyn" , James Morris , selinux@tycho.nsa.gov Subject: Re: NULL pointer dereference in selinux_ip_postroute_compat References: <50215A7E.8000701@linaro.org> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12080721-7282-0000-0000-00000BBE4C0D Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1481 Lines: 40 On 08/07/2012 02:50 PM, Paul Moore wrote: > On Tue, Aug 7, 2012 at 2:12 PM, John Stultz wrote: >> Hi, >> With my kvm environment using 3.6-rc1+, I'm seeing NULL pointer >> dereferences in selinux_ip_postroute_compat(). It looks like the sksec value >> is null and we die in the following line: >> >> if (selinux_xfrm_postroute_last(sksec->sid, skb, &ad, proto)) >> >> This triggers every time I shutdown the machine, but has also triggered >> randomly after a few hours. >> >> This is on an ubuntu 12.04 image, not using selinux. > NOTE: Adding the SELinux list to the CC line Thanks! > > Hi, > > I'm trying to understand this and I was hoping you could you clarify a > few things for me: > > * Is the panic in the Ubuntu 12.04 guest, or the host? If the host, > could you share what distribution you are using? Sorry, its a 12.04 guest. I think the host is Ubuntu 12.04 as well. > * When you say you are not using SELinux, could you be more specific? > It seems odd that you are not using SELinux but the panic is happening > in a SELinux hook. I just mean that, being Ubuntu, the system (userland) isn't configured to use selinux. SELinux is just enabled in the kernel config. thanks -john -- 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/