From mboxrd@z Thu Jan 1 00:00:00 1970 From: Radim =?utf-8?B?S3LEjW3DocWZ?= Subject: Re: [RFH] NULL pointer dereference oops occurs when running kvm VM Date: Tue, 16 Aug 2016 18:49:32 +0200 Message-ID: <20160816164931.GA22826@potion> References: <20160815125011.GA16471@potion> <787289f9-ef25-5b25-6b01-e557db57cb44@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org, guangrong.xiao@linux.intel.com, pbonzini@redhat.com To: Xiexiangyou Return-path: Received: from mx1.redhat.com ([209.132.183.28]:51560 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751292AbcHPQue (ORCPT ); Tue, 16 Aug 2016 12:50:34 -0400 Content-Disposition: inline In-Reply-To: <787289f9-ef25-5b25-6b01-e557db57cb44@huawei.com> Sender: kvm-owner@vger.kernel.org List-ID: 2016-08-16 16:25+0800, Xiexiangyou: > Thanks for your reply :) > > I'm confused that it throw an exception "NULL pointer dereference" when > implement "mov 0x45114(%rip),%rax" instruction. Because "0x45114(%rip)" couldn't be NULL. > Will thread stack overflow result in Oops which is hard to explain like this? Probably not, but it is easy to rule out. Can't trust anything in a corrupted system ...