Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753602AbdDJOPR (ORCPT ); Mon, 10 Apr 2017 10:15:17 -0400 Received: from szxga01-in.huawei.com ([45.249.212.187]:5320 "EHLO dggrg01-dlp.huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753366AbdDJOPQ (ORCPT ); Mon, 10 Apr 2017 10:15:16 -0400 Message-ID: <58EB92A0.2090509@huawei.com> Date: Mon, 10 Apr 2017 22:11:44 +0800 From: zhong jiang User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Mel Gorman CC: Michal Hocko , Johannes Weiner , , Vlastimil Babka , "Linux Memory Management List" , LKML Subject: Re: NULL pointer dereference in the kernel 3.10 References: <58E8E81E.6090304@huawei.com> <20170410085604.zpenj6ggc3dsbgxw@techsingularity.net> <58EB761E.9040002@huawei.com> <20170410140646.hyfbzc5367442hty@techsingularity.net> In-Reply-To: <20170410140646.hyfbzc5367442hty@techsingularity.net> Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.29.68] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020206.58EB92AF.0060,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: f71a8482e51a4bced812ad5fc79a857f Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1652 Lines: 32 On 2017/4/10 22:06, Mel Gorman wrote: > On Mon, Apr 10, 2017 at 08:10:06PM +0800, zhong jiang wrote: >> On 2017/4/10 16:56, Mel Gorman wrote: >>> On Sat, Apr 08, 2017 at 09:39:42PM +0800, zhong jiang wrote: >>>> when runing the stabile docker cases in the vm. The following issue will come up. >>>> >>>> #40 [ffff8801b57ffb30] async_page_fault at ffffffff8165c9f8 >>>> [exception RIP: down_read_trylock+5] >>>> RIP: ffffffff810aca65 RSP: ffff8801b57ffbe8 RFLAGS: 00010202 >>>> RAX: 0000000000000000 RBX: ffff88018ae858c1 RCX: 0000000000000000 >>>> RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000008 >>>> RBP: ffff8801b57ffc10 R8: ffffea0006903de0 R9: ffff8800b3c61810 >>>> R10: 00000000000022cb R11: 0000000000000000 R12: ffff88018ae858c0 >>>> R13: ffffea0006903dc0 R14: 0000000000000008 R15: ffffea0006903dc0 >>>> ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000 >>> Post the full report including the kernel version and state whether any >>> additional patches to 3.10 are applied. >>> >> Hi, Mel >> >> Our kernel from RHEL 7.2, Addtional patches all from upstream -- include Bugfix and CVE. >> >> Commit 624483f3ea8 ("mm: rmap: fix use-after-free in __put_anon_vma") exclude in >> the RHEL 7.2. it looks seems to the issue. but I don't know how it triggered. >> or it is not the correct fix. Any suggestion? Thanks >> > I'm afraid you'll need to bring it up with RHEL support as it contains > a number of backported patches from them that cannot be meaningfully > evaluated outside of RedHat and they may have additional questions on the > patches applied on top. > Thanks