Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752346AbdC0UmC convert rfc822-to-8bit (ORCPT ); Mon, 27 Mar 2017 16:42:02 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:55240 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751801AbdC0Ulx (ORCPT ); Mon, 27 Mar 2017 16:41:53 -0400 To: longli@microsoft.com Cc: KY Srinivasan , "Martin K. Petersen" , Haiyang Zhang , sthemmin@microsoft.com, "jejb@linux.vnet.ibm.com" , devel@linuxdriverproject.org, linux-scsi , LKML , "stable@vger.kernel.org" , Greg KH From: Joseph Salisbury Subject: [REGRESSION][Stable][v3.12.y][v4.4.y][v4.9.y][v4.10.y][v4.11-rc1] scsi: storvsc: properly set residual data length on errors Message-ID: <5df6cd65-92d5-e4c5-56e3-771643f86861@canonical.com> Date: Mon, 27 Mar 2017 16:22:09 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.7.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 859 Lines: 30 Hi Long Li, A kernel bug report was opened against Ubuntu [0]. After a kernel bisect, it was found that reverting the following commit resolved this bug: commit 40630f462824ee24bc00d692865c86c3828094e0 Author: Long Li Date: Wed Dec 14 18:46:03 2016 -0800 scsi: storvsc: properly set residual data length on errors The regression was introduced in mainline as of v4.11-rc1. It was also cc'd to stable and has landed in v3.12.y, v4.4.y, v4.9.y and v4.10.y. This regression seems pretty severe since it's preventing virtual machines from booting. It's affecting a couple of users so far. I was hoping to get your feedback, since you are the patch author. Do you think gathering any additional data will help diagnose this issue, or would it be best to submit a revert request? Thanks, Joe [0] http://pad.lv/1674635