From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35862 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756280AbdAFO32 (ORCPT ); Fri, 6 Jan 2017 09:29:28 -0500 Subject: Patch "hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels()" has been added to the 4.8-stable tree To: vkuznets@redhat.com, gregkh@linuxfoundation.org, kys@microsoft.com Cc: , From: Date: Fri, 06 Jan 2017 15:27:49 +0100 Message-ID: <14837128695847@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 hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels() to the 4.8-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: hv-acquire-vmbus_connection.channel_mutex-in-vmbus_free_channels.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From abd1026da4a7700a8db370947f75cd17b6ae6f76 Mon Sep 17 00:00:00 2001 From: Vitaly Kuznetsov Date: Sat, 3 Dec 2016 12:34:32 -0800 Subject: hv: acquire vmbus_connection.channel_mutex in vmbus_free_channels() From: Vitaly Kuznetsov commit abd1026da4a7700a8db370947f75cd17b6ae6f76 upstream. "kernel BUG at drivers/hv/channel_mgmt.c:350!" is observed when hv_vmbus module is unloaded. BUG_ON() was introduced in commit 85d9aa705184 ("Drivers: hv: vmbus: add an API vmbus_hvsock_device_unregister()") as vmbus_free_channels() codepath was apparently forgotten. Fixes: 85d9aa705184 ("Drivers: hv: vmbus: add an API vmbus_hvsock_device_unregister()") Signed-off-by: Vitaly Kuznetsov Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman --- drivers/hv/channel_mgmt.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/hv/channel_mgmt.c +++ b/drivers/hv/channel_mgmt.c @@ -348,6 +348,7 @@ void vmbus_free_channels(void) { struct vmbus_channel *channel, *tmp; + mutex_lock(&vmbus_connection.channel_mutex); list_for_each_entry_safe(channel, tmp, &vmbus_connection.chn_list, listentry) { /* hv_process_channel_removal() needs this */ @@ -355,6 +356,7 @@ void vmbus_free_channels(void) vmbus_device_unregister(channel->device_obj); } + mutex_unlock(&vmbus_connection.channel_mutex); } /* Patches currently in stable-queue which might be from vkuznets@redhat.com are queue-4.8/hv-acquire-vmbus_connection.channel_mutex-in-vmbus_free_channels.patch