From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933158AbaHYOxh (ORCPT ); Mon, 25 Aug 2014 10:53:37 -0400 Received: from mail-bn1blp0184.outbound.protection.outlook.com ([207.46.163.184]:41706 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932667AbaHYOxg (ORCPT ); Mon, 25 Aug 2014 10:53:36 -0400 From: KY Srinivasan To: Richard Weinberger , Sitsofe Wheeler CC: Haiyang Zhang , Greg Kroah-Hartman , "devel@linuxdriverproject.org" , "linux-kernel@vger.kernel.org" , Jason Wang , "Daniel Borkmann" , "David S. Miller" , "netdev@vger.kernel.org" Subject: RE: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU Thread-Topic: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU Thread-Index: AQHPu6pIm2pwB6mvJU2s1pqxWk+oepvYcg4AgABn54CACFLTAIAAQ+1w Date: Mon, 25 Aug 2014 14:53:32 +0000 Message-ID: <2c4d3b36d8be4fbf884d78c7507a29af@BY2PR0301MB0711.namprd03.prod.outlook.com> References: <20140819123655.GC12160@sucs.org> <8dcf334714c44eeda54ecb129479719b@DFM-DB3MBX15-06.exchange.corp.microsoft.com> <20140820034116.GA3407@sucs.org> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [50.135.110.52] x-microsoft-antispam: BCL:0;PCL:0;RULEID:;UriScan:; x-forefront-prvs: 03142412E2 x-forefront-antispam-report: SFV:NSPM;SFS:(6009001)(13464003)(51704005)(199003)(189002)(377454003)(164054003)(24454002)(83322001)(19580405001)(81342001)(21056001)(19580395003)(81542001)(101416001)(99396002)(76176999)(77096002)(74316001)(83072002)(85852003)(87936001)(76576001)(106356001)(86362001)(33646002)(92566001)(105586002)(80022001)(106116001)(66066001)(64706001)(99286002)(108616004)(20776003)(95666004)(74662001)(31966008)(74502001)(76482001)(85306004)(90102001)(77982001)(79102001)(86612001)(54356999)(50986999)(107046002)(93886004)(4396001)(2656002)(46102001)(24736002);DIR:OUT;SFP:;SCL:1;SRVR:BY2PR0301MB0709;H:BY2PR0301MB0711.namprd03.prod.outlook.com;FPR:;MLV:sfv;PTR:InfoNoRecords;A:1;MX:1;LANG:en; Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 X-OriginatorOrg: microsoft.onmicrosoft.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id s7PErhCf027425 > -----Original Message----- > From: Richard Weinberger [mailto:richard.weinberger@gmail.com] > Sent: Monday, August 25, 2014 3:48 AM > To: Sitsofe Wheeler > Cc: Haiyang Zhang; KY Srinivasan; Greg Kroah-Hartman; > devel@linuxdriverproject.org; linux-kernel@vger.kernel.org; Jason Wang; > Daniel Borkmann; David S. Miller; netdev@vger.kernel.org > Subject: Re: [hyperv] BUG at drivers/hv/channel.c:462 while changing MTU > > via > > > On Wed, Aug 20, 2014 at 5:41 AM, Sitsofe Wheeler > wrote: > > Aug 20 04:04:41 ubuntuhv kernel: [ 9.230399] random: nonblocking pool is > initialized > > Aug 20 04:04:41 ubuntuhv kernel: [ 10.338487] EXT4-fs (sda1): re- > mounted. Opts: errors=remount-ro > > Aug 20 04:04:41 ubuntuhv kernel: [ 11.099094] hv_storvsc vmbus_0_1: > cmd 0x85 scsi status 0x2 srb status 0x6 > > Aug 20 04:04:41 ubuntuhv kernel: [ 11.099901] hv_storvsc vmbus_0_1: > cmd 0x85 scsi status 0x2 srb status 0x6 > > Aug 20 04:04:43 ubuntuhv kernel: [ 12.999830] psmouse serio1: trackpoint: > IBM TrackPoint firmware: 0x01, buttons: 0/0 > > Aug 20 03:55:47 ubuntuhv kernel: [ 13.003659] input: TPPS/2 IBM > TrackPoint as /devices/platform/i8042/serio1/input/input4 > > Aug 20 03:57:28 ubuntuhv kernel: [ 113.711832] hv_netvsc vmbus_0_14: > > net device safe to remove Aug 20 03:57:28 ubuntuhv kernel: [ > > 113.713882] hv_netvsc: hv_netvsc channel opened successfully Aug 20 > > 03:57:29 ubuntuhv kernel: [ 114.961312] hv_netvsc vmbus_0_14: Send > > section size: 6144, Section count:2560 Aug 20 03:57:29 ubuntuhv > > kernel: [ 114.962711] hv_netvsc vmbus_0_14: Device MAC > > 00:15:5d:6f:02:af link state up Aug 20 03:57:34 ubuntuhv kernel: [ > > 120.027718] hv_netvsc vmbus_0_14: net device safe to remove Aug 20 > > 03:57:34 ubuntuhv kernel: [ 120.030047] hv_netvsc: hv_netvsc channel > > opened successfully Aug 20 03:57:34 ubuntuhv kernel: [ 120.035422] > hv_netvsc vmbus_0_14 eth0: unable to establish receive buffer's gpadl Aug > 20 03:57:34 ubuntuhv kernel: [ 120.039778] hv_netvsc vmbus_0_14 eth0: > unable to connect to NetVSP - 4 Aug 20 03:57:34 ubuntuhv kernel: [ > 120.039818] ------------[ cut here ]------------ Aug 20 03:57:34 ubuntuhv kernel: > [ 120.039832] kernel BUG at drivers/hv/channel.c:504! > > This is one is also a rude BUG_ON: > ret = vmbus_post_msg(msg, sizeof(struct > vmbus_channel_close_channel)); > > BUG_ON(ret != 0); > > vmbus_post_msg() hv_post_message() can easily return !0. > i.e. if this kmalloc() fails: > addr = (unsigned long)kmalloc(sizeof(struct aligned_input), > GFP_ATOMIC); > if (!addr) > return -ENOMEM; I will submit a patch to handle this case. I suspect though that the original ASSERT at channel.c (line 504) is not related to kmalloc failing in vmbus_post_msg(). I will also look at that issue as well. Regards, K. Y > > -- > Thanks, > //richard {.n++%ݶw{.n+{G{ayʇڙ,jfhz_(階ݢj"mG?&~iOzv^m ?I