From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:36482 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752238AbdIVKOm (ORCPT ); Fri, 22 Sep 2017 06:14:42 -0400 Subject: Patch "scsi: storvsc: fix memory leak on ring buffer busy" has been added to the 4.13-stable tree To: longli@microsoft.com, gregkh@linuxfoundation.org, martin.petersen@oracle.com Cc: , From: Date: Fri, 22 Sep 2017 12:14:41 +0200 Message-ID: <150607528111711@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled scsi: storvsc: fix memory leak on ring buffer busy to the 4.13-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-storvsc-fix-memory-leak-on-ring-buffer-busy.patch and it can be found in the queue-4.13 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 0208eeaa650c5c866a3242201678a19e6dc4a14e Mon Sep 17 00:00:00 2001 From: Long Li Date: Mon, 28 Aug 2017 17:43:59 -0700 Subject: scsi: storvsc: fix memory leak on ring buffer busy From: Long Li commit 0208eeaa650c5c866a3242201678a19e6dc4a14e upstream. When storvsc is sending I/O to Hyper-v, it may allocate a bigger buffer descriptor for large data payload that can't fit into a pre-allocated buffer descriptor. This bigger buffer is freed on return path. If I/O request to Hyper-v fails due to ring buffer busy, the storvsc allocated buffer descriptor should also be freed. [mkp: applied by hand] Fixes: be0cf6ca301c ("scsi: storvsc: Set the tablesize based on the information given by the host") Signed-off-by: Long Li Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/storvsc_drv.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/scsi/storvsc_drv.c +++ b/drivers/scsi/storvsc_drv.c @@ -1640,6 +1640,8 @@ static int storvsc_queuecommand(struct S put_cpu(); if (ret == -EAGAIN) { + if (payload_sz > sizeof(cmd_request->mpb)) + kfree(payload); /* no more space */ return SCSI_MLQUEUE_DEVICE_BUSY; } Patches currently in stable-queue which might be from longli@microsoft.com are queue-4.13/scsi-storvsc-fix-memory-leak-on-ring-buffer-busy.patch